Merge branch 'fix-search' of https://github.com/mauriciocolli/NewPipe into fix-search

.travis.yml

@@ -5,7 +5,7 @@ android:
   components:
     # The BuildTools version used by NewPipe
     - tools
-    - build-tools-25.0.0
+    - build-tools-25.0.2
 
     # The SDK version used to compile NewPipe
     - android-25

app/build.gradle

@@ -39,14 +39,16 @@ dependencies {
     compile 'com.android.support:support-v4:25.3.1'
     compile 'com.android.support:design:25.3.1'
     compile 'com.android.support:recyclerview-v7:25.3.1'
+
+    compile 'com.google.code.gson:gson:2.7'
     compile 'org.jsoup:jsoup:1.8.3'
     compile 'org.mozilla:rhino:1.7.7'
-    compile 'info.guardianproject.netcipher:netcipher:1.2'
-    compile 'de.hdodenhof:circleimageview:2.0.0'
-    compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
-    compile 'com.github.nirhart:parallaxscroll:1.0'
-    compile 'com.google.code.gson:gson:2.7'
-    compile 'com.nononsenseapps:filepicker:3.0.0'
     compile 'ch.acra:acra:4.9.0'
+    compile 'info.guardianproject.netcipher:netcipher:1.2'
+
+    compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
+    compile 'de.hdodenhof:circleimageview:2.0.0'
+    compile 'com.github.nirhart:parallaxscroll:1.0'
+    compile 'com.nononsenseapps:filepicker:3.0.0'
     compile 'com.google.android.exoplayer:exoplayer:r2.3.1'
 }

app/src/main/java/org/schabi/newpipe/App.java

@@ -15,6 +15,7 @@ import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.report.AcraReportSenderFactory;
 import org.schabi.newpipe.report.ErrorActivity;
 import org.schabi.newpipe.settings.SettingsActivity;
+import org.schabi.newpipe.util.ThemeHelper;
 
 import info.guardianproject.netcipher.NetCipher;
 import info.guardianproject.netcipher.proxy.OrbotHelper;
@@ -82,6 +83,8 @@ public class App extends Application {
         // DO NOT REMOVE THIS FUNCTION!!!
         // Otherwise downloadPathPreference has invalid value.
         SettingsActivity.initSettings(this);
+
+        ThemeHelper.setTheme(getApplicationContext());
     }
 
     /**

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -21,19 +21,23 @@
 package org.schabi.newpipe;
 
 import android.content.Intent;
-import android.media.AudioManager;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
+import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
+import android.view.View;
 
 import com.nostra13.universalimageloader.core.ImageLoader;
 
 import org.schabi.newpipe.download.DownloadActivity;
 import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.fragments.MainFragment;
 import org.schabi.newpipe.fragments.OnItemSelectedListener;
 import org.schabi.newpipe.fragments.channel.ChannelFragment;
 import org.schabi.newpipe.fragments.detail.VideoDetailFragment;
@@ -45,7 +49,8 @@ import org.schabi.newpipe.util.PermissionHelper;
 import org.schabi.newpipe.util.ThemeHelper;
 
 public class MainActivity extends AppCompatActivity implements OnItemSelectedListener {
-    //private static final String TAG = "MainActivity";
+    private static final String TAG = "MainActivity";
+    public static final boolean DEBUG = false;
 
     /*//////////////////////////////////////////////////////////////////////////
     // Activity's LifeCycle
@@ -53,18 +58,22 @@ public class MainActivity extends AppCompatActivity implements OnItemSelectedLis
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        ThemeHelper.setTheme(this, true);
+        if (DEBUG) Log.d(TAG, "onCreate() called with: savedInstanceState = [" + savedInstanceState + "]");
+        ThemeHelper.setTheme(this);
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
-        setVolumeControlStream(AudioManager.STREAM_MUSIC);
 
         if (getSupportFragmentManager() != null && getSupportFragmentManager().getBackStackEntryCount() == 0) {
             initFragments();
         }
+
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
     }
 
     @Override
     protected void onNewIntent(Intent intent) {
+        if (DEBUG) Log.d(TAG, "onNewIntent() called with: intent = [" + intent + "]");
         if (intent != null) {
             // Return if launched from a launcher (e.g. Nova Launcher, Pixel Launcher ...)
             // to not destroy the already created backstack
@@ -79,22 +88,11 @@ public class MainActivity extends AppCompatActivity implements OnItemSelectedLis
 
     @Override
     public void onBackPressed() {
+        if (DEBUG) Log.d(TAG, "onBackPressed() called");
         Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.fragment_holder);
         if (fragment instanceof VideoDetailFragment) if (((VideoDetailFragment) fragment).onActivityBackPressed()) return;
 
-        if (getSupportFragmentManager().getBackStackEntryCount() >= 2) {
-            getSupportFragmentManager().popBackStackImmediate();
-        } else {
-            if (fragment instanceof SearchFragment) {
-                SearchFragment searchFragment = (SearchFragment) fragment;
-                if (!searchFragment.isMainBgVisible()) {
-                    getSupportFragmentManager().beginTransaction().remove(fragment).commitNow();
-                    NavigationHelper.openMainActivity(this);
-                    return;
-                }
-            }
-            finish();
-        }
+        super.onBackPressed();
     }
 
     /*//////////////////////////////////////////////////////////////////////////
@@ -103,14 +101,32 @@ public class MainActivity extends AppCompatActivity implements OnItemSelectedLis
 
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
+        if (DEBUG) Log.d(TAG, "onCreateOptionsMenu() called with: menu = [" + menu + "]");
         super.onCreateOptionsMenu(menu);
-        MenuInflater inflater = getMenuInflater();
-        inflater.inflate(R.menu.main_menu, menu);
+
+        Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.fragment_holder);
+        if (!(fragment instanceof VideoDetailFragment)) {
+            findViewById(R.id.toolbar).findViewById(R.id.toolbar_spinner).setVisibility(View.GONE);
+        }
+
+        if (!(fragment instanceof SearchFragment)) {
+            findViewById(R.id.toolbar).findViewById(R.id.toolbar_search_container).setVisibility(View.GONE);
+
+            MenuInflater inflater = getMenuInflater();
+            inflater.inflate(R.menu.main_menu, menu);
+        }
+
+        ActionBar actionBar = getSupportActionBar();
+        if (actionBar != null) {
+            actionBar.setDisplayShowTitleEnabled(false);
+            actionBar.setDisplayHomeAsUpEnabled(false);
+        }
         return true;
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
+        if (DEBUG) Log.d(TAG, "onOptionsItemSelected() called with: item = [" + item + "]");
         int id = item.getItemId();
 
         switch (id) {
@@ -144,9 +160,10 @@ public class MainActivity extends AppCompatActivity implements OnItemSelectedLis
     //////////////////////////////////////////////////////////////////////////*/
 
     private void initFragments() {
+        openMainFragment();
         if (getIntent() != null && getIntent().hasExtra(Constants.KEY_URL)) {
             handleIntent(getIntent());
-        } else openSearchFragment();
+        }
     }
 
     /*//////////////////////////////////////////////////////////////////////////
@@ -170,6 +187,13 @@ public class MainActivity extends AppCompatActivity implements OnItemSelectedLis
     //////////////////////////////////////////////////////////////////////////*/
 
     private void handleIntent(Intent intent) {
+        if (intent.hasExtra(Constants.KEY_THEME_CHANGE) && intent.getBooleanExtra(Constants.KEY_THEME_CHANGE, false)) {
+            this.recreate();
+            Intent setI = new Intent(this, SettingsActivity.class);
+            startActivity(setI);
+            return;
+        }
+
         if (intent.hasExtra(Constants.KEY_LINK_TYPE)) {
             String url = intent.getStringExtra(Constants.KEY_URL);
             int serviceId = intent.getIntExtra(Constants.KEY_SERVICE_ID, 0);
@@ -187,24 +211,34 @@ public class MainActivity extends AppCompatActivity implements OnItemSelectedLis
             } catch (Exception e) {
                 e.printStackTrace();
             }
+        } else if (intent.hasExtra(Constants.KEY_OPEN_SEARCH)) {
+            String searchQuery = intent.getStringExtra(Constants.KEY_QUERY);
+            if (searchQuery == null) searchQuery = "";
+            int serviceId = intent.getIntExtra(Constants.KEY_SERVICE_ID, 0);
+            openSearchFragment(serviceId, searchQuery);
         } else {
             getSupportFragmentManager().popBackStackImmediate(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
-            openSearchFragment();
+            openMainFragment();//openSearchFragment();
         }
     }
 
-    private void openSearchFragment() {
+    private void openMainFragment() {
         ImageLoader.getInstance().clearMemoryCache();
         getSupportFragmentManager().beginTransaction()
                 .setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out, android.R.anim.fade_in, android.R.anim.fade_out)
-                .replace(R.id.fragment_holder, new SearchFragment())
+                .replace(R.id.fragment_holder, new MainFragment())
+                .commit();
+    }
+
+    private void openSearchFragment(int serviceId, String query) {
+        getSupportFragmentManager().beginTransaction()
+                .setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out, android.R.anim.fade_in, android.R.anim.fade_out)
+                .replace(R.id.fragment_holder, SearchFragment.getInstance(serviceId, query))
                 .addToBackStack(null)
                 .commit();
     }
 
     private void openVideoDetailFragment(int serviceId, String url, String title, boolean autoPlay) {
-        ImageLoader.getInstance().clearMemoryCache();
-
         Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.fragment_holder);
         if (title == null) title = "";
 
@@ -226,11 +260,10 @@ public class MainActivity extends AppCompatActivity implements OnItemSelectedLis
     }
 
     private void openChannelFragment(int serviceId, String url, String name) {
-        ImageLoader.getInstance().clearMemoryCache();
         if (name == null) name = "";
         getSupportFragmentManager().beginTransaction()
                 .setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out, android.R.anim.fade_in, android.R.anim.fade_out)
-                .replace(R.id.fragment_holder, ChannelFragment.newInstance(serviceId, url, name))
+                .replace(R.id.fragment_holder, ChannelFragment.getInstance(serviceId, url, name))
                 .addToBackStack(null)
                 .commit();
     }

app/src/main/java/org/schabi/newpipe/ReCaptchaActivity.java

@@ -8,6 +8,7 @@ import android.os.Bundle;
 import android.support.v4.app.NavUtils;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
 import android.view.MenuItem;
 import android.webkit.CookieManager;
 import android.webkit.ValueCallback;
@@ -48,10 +49,15 @@ public class ReCaptchaActivity extends AppCompatActivity {
         // Set return to Cancel by default
         setResult(RESULT_CANCELED);
 
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
         ActionBar actionBar = getSupportActionBar();
-        actionBar.setDisplayHomeAsUpEnabled(true);
-        actionBar.setTitle(R.string.reCaptcha_title);
-        actionBar.setDisplayShowTitleEnabled(true);
+        if (actionBar != null) {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+            actionBar.setTitle(R.string.reCaptcha_title);
+            actionBar.setDisplayShowTitleEnabled(true);
+        }
 
         WebView myWebView = (WebView) findViewById(R.id.reCaptchaWebView);
 

app/src/main/java/org/schabi/newpipe/download/DownloadActivity.java

@@ -8,7 +8,6 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
-import android.support.v4.app.NavUtils;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
@@ -26,13 +25,11 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import org.schabi.newpipe.R;
-import org.schabi.newpipe.report.ErrorActivity;
 import org.schabi.newpipe.settings.NewPipeSettings;
 import org.schabi.newpipe.settings.SettingsActivity;
 import org.schabi.newpipe.util.ThemeHelper;
 
 import java.io.File;
-import java.util.Vector;
 
 import us.shandian.giga.service.DownloadManagerService;
 import us.shandian.giga.ui.fragment.AllMissionsFragment;
@@ -64,17 +61,19 @@ public class DownloadActivity extends AppCompatActivity implements AdapterView.O
         i.setClass(this, DownloadManagerService.class);
         startService(i);
 
+        ThemeHelper.setTheme(this);
         super.onCreate(savedInstanceState);
-        ThemeHelper.setTheme(this, true);
         setContentView(R.layout.activity_downloader);
 
-        //noinspection ConstantConditions
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
 
-        // its ok if this fails, we will catch that error later, and send it as report
         ActionBar actionBar = getSupportActionBar();
-        actionBar.setDisplayHomeAsUpEnabled(true);
-        actionBar.setTitle(R.string.downloads_title);
-        actionBar.setDisplayShowTitleEnabled(true);
+        if (actionBar != null) {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+            actionBar.setTitle(R.string.downloads_title);
+            actionBar.setDisplayShowTitleEnabled(true);
+        }
 
         mPrefs = PreferenceManager.getDefaultSharedPreferences(this);
 
@@ -159,7 +158,7 @@ public class DownloadActivity extends AppCompatActivity implements AdapterView.O
         name.setText(getIntent().getStringExtra("fileName"));
 
         toolbar.setTitle(R.string.add);
-        toolbar.setNavigationIcon(R.drawable.ic_arrow_back_black_24dp);
+        toolbar.setNavigationIcon(ThemeHelper.isLightThemeSelected(this) ? R.drawable.ic_arrow_back_black_24dp : R.drawable.ic_arrow_back_white_24dp);
         toolbar.inflateMenu(R.menu.dialog_url);
 
         // Show the dialog
@@ -183,7 +182,7 @@ public class DownloadActivity extends AppCompatActivity implements AdapterView.O
                 if (item.getItemId() == R.id.okay) {
 
                     String location;
-                    if(audioButton.isChecked()) {
+                    if (audioButton.isChecked()) {
                         location = NewPipeSettings.getAudioDownloadPath(DownloadActivity.this);
                     } else {
                         location = NewPipeSettings.getVideoDownloadPath(DownloadActivity.this);
@@ -201,7 +200,7 @@ public class DownloadActivity extends AppCompatActivity implements AdapterView.O
                                 audioButton.isChecked(), threads.getProgress() + 1);
                         mFragment.notifyChange();
 
-                        mPrefs.edit().putInt(THREADS, threads.getProgress() + 1).commit();
+                        mPrefs.edit().putInt(THREADS, threads.getProgress() + 1).apply();
                         mPendingUrl = null;
                         dialog.dismiss();
                     }

app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java

@@ -1,14 +1,11 @@
 package org.schabi.newpipe.download;
 
 import android.Manifest;
-import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
-import android.content.ServiceConnection;
 import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.os.Bundle;
-import android.os.IBinder;
 import android.support.annotation.Nullable;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.app.DialogFragment;
@@ -26,34 +23,32 @@ import android.widget.TextView;
 
 import org.schabi.newpipe.App;
 import org.schabi.newpipe.R;
-import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.settings.NewPipeSettings;
+import org.schabi.newpipe.util.ThemeHelper;
 
 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 
-import us.shandian.giga.get.DownloadManager;
-import us.shandian.giga.get.DownloadMission;
 import us.shandian.giga.service.DownloadManagerService;
 
 
 /**
  * Created by Christian Schabesberger on 21.09.15.
- *
+ * <p>
  * Copyright (C) Christian Schabesberger 2015 <chris.schabesberger@mailbox.org>
  * DownloadDialog.java is part of NewPipe.
- *
+ * <p>
  * NewPipe is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
+ * <p>
  * NewPipe is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
+ * <p>
  * You should have received a copy of the GNU General Public License
  * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
  */
@@ -71,8 +66,7 @@ public class DownloadDialog extends DialogFragment {
 
     }
 
-    public static DownloadDialog newInstance(Bundle args)
-    {
+    public static DownloadDialog newInstance(Bundle args) {
         DownloadDialog dialog = new DownloadDialog();
         dialog.setArguments(args);
         dialog.setStyle(DialogFragment.STYLE_NO_TITLE, 0);
@@ -100,7 +94,7 @@ public class DownloadDialog extends DialogFragment {
         final SeekBar threads = (SeekBar) view.findViewById(R.id.threads);
 
         toolbar.setTitle(R.string.download_dialog_title);
-        toolbar.setNavigationIcon(R.drawable.ic_arrow_back_black_24dp);
+        toolbar.setNavigationIcon(ThemeHelper.isLightThemeSelected(getActivity()) ? R.drawable.ic_arrow_back_black_24dp : R.drawable.ic_arrow_back_white_24dp);
         toolbar.inflateMenu(R.menu.dialog_url);
         toolbar.setNavigationOnClickListener(new View.OnClickListener() {
             @Override
@@ -151,16 +145,16 @@ public class DownloadDialog extends DialogFragment {
 
     }
 
-    protected void checkDownloadOptions(){
+    protected void checkDownloadOptions() {
         View view = getView();
         Bundle arguments = getArguments();
         RadioButton audioButton = (RadioButton) view.findViewById(R.id.audio_button);
         RadioButton videoButton = (RadioButton) view.findViewById(R.id.video_button);
 
-        if(arguments.getString(AUDIO_URL) == null) {
+        if (arguments.getString(AUDIO_URL) == null) {
             audioButton.setVisibility(View.GONE);
             videoButton.setChecked(true);
-        } else if(arguments.getString(VIDEO_URL) == null) {
+        } else if (arguments.getString(VIDEO_URL) == null) {
             videoButton.setVisibility(View.GONE);
             audioButton.setChecked(true);
         }
@@ -169,11 +163,11 @@ public class DownloadDialog extends DialogFragment {
     /**
      * #143 #44 #42 #22: make shure that the filename does not contain illegal chars.
      * This should fix some of the "cannot download" problems.
-     * */
+     */
     private String createFileName(String fName) {
         // from http://eng-przemelek.blogspot.de/2009/07/how-to-create-valid-file-name.html
 
-        List<String> forbiddenCharsPatterns = new ArrayList<> ();
+        List<String> forbiddenCharsPatterns = new ArrayList<>();
         forbiddenCharsPatterns.add("[:]+"); // Mac OS, but it looks that also Windows XP
         forbiddenCharsPatterns.add("[\\*\"/\\\\\\[\\]\\:\\;\\|\\=\\,]+");  // Windows
         forbiddenCharsPatterns.add("[^\\w\\d\\.]+");  // last chance... only latin letters and digits
@@ -186,8 +180,7 @@ public class DownloadDialog extends DialogFragment {
 
 
     //download audio, video or both?
-    private void download()
-    {
+    private void download() {
         View view = getView();
         Bundle arguments = getArguments();
         final EditText name = (EditText) view.findViewById(R.id.file_name);
@@ -199,7 +192,7 @@ public class DownloadDialog extends DialogFragment {
 
         boolean isAudio = audioButton.isChecked();
         String url, location, filename;
-        if(isAudio) {
+        if (isAudio) {
             url = arguments.getString(AUDIO_URL);
             location = NewPipeSettings.getAudioDownloadPath(getContext());
             filename = fName + arguments.getString(FILE_SUFFIX_AUDIO);
@@ -218,11 +211,11 @@ public class DownloadDialog extends DialogFragment {
     private void download(String url, String title,
                           String fileSuffix, File downloadDir, Context context) {
 
-        File saveFilePath = new File(downloadDir,createFileName(title) + fileSuffix);
+        File saveFilePath = new File(downloadDir, createFileName(title) + fileSuffix);
 
         long id = 0;
 
-        Log.i(TAG,"Started downloading '" + url +
+        Log.i(TAG, "Started downloading '" + url +
                 "' => '" + saveFilePath + "' #" + id);
 
         if (App.isUsingTor()) {

app/src/main/java/org/schabi/newpipe/fragments/BaseFragment.java

@@ -0,0 +1,243 @@
+package org.schabi.newpipe.fragments;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Rect;
+import android.os.Bundle;
+import android.support.annotation.AttrRes;
+import android.support.v4.app.Fragment;
+import android.support.v4.view.ViewCompat;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.util.Log;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.Button;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.nostra13.universalimageloader.core.DisplayImageOptions;
+import com.nostra13.universalimageloader.core.ImageLoader;
+import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
+
+import org.schabi.newpipe.MainActivity;
+import org.schabi.newpipe.R;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public abstract class BaseFragment extends Fragment {
+    protected final String TAG = "BaseFragment@" + Integer.toHexString(hashCode());
+    protected static final boolean DEBUG = MainActivity.DEBUG;
+
+    protected AppCompatActivity activity;
+    protected OnItemSelectedListener onItemSelectedListener;
+
+    protected AtomicBoolean isLoading = new AtomicBoolean(false);
+    protected AtomicBoolean wasLoading = new AtomicBoolean(false);
+
+    protected static final ImageLoader imageLoader = ImageLoader.getInstance();
+    protected static final DisplayImageOptions displayImageOptions =
+            new DisplayImageOptions.Builder().displayer(new FadeInBitmapDisplayer(400)).cacheInMemory(false).build();
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Views
+    //////////////////////////////////////////////////////////////////////////*/
+
+    protected Toolbar toolbar;
+
+    protected View errorPanel;
+    protected Button errorButtonRetry;
+    protected TextView errorTextView;
+    protected ProgressBar loadingProgressBar;
+    //protected SwipeRefreshLayout swipeRefreshLayout;
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Fragment's Lifecycle
+    //////////////////////////////////////////////////////////////////////////*/
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        if (DEBUG) Log.d(TAG, "onAttach() called with: context = [" + context + "]");
+
+        activity = (AppCompatActivity) context;
+        onItemSelectedListener = (OnItemSelectedListener) context;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (DEBUG) Log.d(TAG, "onCreate() called with: savedInstanceState = [" + savedInstanceState + "]");
+
+        isLoading.set(false);
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public void onViewCreated(View rootView, Bundle savedInstanceState) {
+        if (DEBUG) Log.d(TAG, "onViewCreated() called with: rootView = [" + rootView + "], savedInstanceState = [" + savedInstanceState + "]");
+        initViews(rootView, savedInstanceState);
+        initListeners();
+        wasLoading.set(false);
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        if (DEBUG) Log.d(TAG, "onDestroyView() called");
+        toolbar = null;
+
+        errorPanel = null;
+        errorButtonRetry = null;
+        errorTextView = null;
+    }
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Init
+    //////////////////////////////////////////////////////////////////////////*/
+
+    protected void initViews(View rootView, Bundle savedInstanceState) {
+        toolbar = (Toolbar) activity.findViewById(R.id.toolbar);
+
+        loadingProgressBar = (ProgressBar) rootView.findViewById(R.id.loading_progress_bar);
+        //swipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.swipe_refresh);
+
+        errorPanel = rootView.findViewById(R.id.error_panel);
+        errorButtonRetry = (Button) rootView.findViewById(R.id.error_button_retry);
+        errorTextView = (TextView) rootView.findViewById(R.id.error_message_view);
+    }
+
+    protected void initListeners() {
+        errorButtonRetry.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                onRetryButtonClicked();
+            }
+        });
+    }
+
+    protected abstract void reloadContent();
+
+    protected void onRetryButtonClicked() {
+        if (DEBUG) Log.d(TAG, "onRetryButtonClicked() called");
+        reloadContent();
+    }
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Utils
+    //////////////////////////////////////////////////////////////////////////*/
+
+    public void animateView(final View view, final boolean enterOrExit, long duration) {
+        animateView(view, enterOrExit, duration, 0, null);
+    }
+
+    public void animateView(final View view, final boolean enterOrExit, long duration, final Runnable execOnEnd) {
+        animateView(view, enterOrExit, duration, 0, execOnEnd);
+    }
+
+    public void animateView(final View view, final boolean enterOrExit, long duration, long delay) {
+        animateView(view, enterOrExit, duration, delay, null);
+    }
+
+    /**
+     * Animate the view
+     *
+     * @param view        view that will be animated
+     * @param enterOrExit true to enter, false to exit
+     * @param duration    how long the animation will take, in milliseconds
+     * @param delay       how long the animation will take to start, in milliseconds
+     * @param execOnEnd   runnable that will be executed when the animation ends
+     */
+    public void animateView(final View view, final boolean enterOrExit, long duration, long delay, final Runnable execOnEnd) {
+        if (DEBUG) Log.d(TAG, "animateView() called with: view = [" + view + "], enterOrExit = [" + enterOrExit + "], duration = [" + duration + "], execOnEnd = [" + execOnEnd + "]");
+        if (view == null) return;
+
+        if (view.getVisibility() == View.VISIBLE && enterOrExit) {
+            view.animate().setListener(null).cancel();
+            view.setVisibility(View.VISIBLE);
+            view.setAlpha(1f);
+            if (execOnEnd != null) execOnEnd.run();
+            return;
+        } else if ((view.getVisibility() == View.GONE || view.getVisibility() == View.INVISIBLE) && !enterOrExit) {
+            view.animate().setListener(null).cancel();
+            view.setVisibility(View.GONE);
+            view.setAlpha(0f);
+            if (execOnEnd != null) execOnEnd.run();
+            return;
+        }
+
+        view.animate().setListener(null).cancel();
+        view.setVisibility(View.VISIBLE);
+
+        if (enterOrExit) {
+            view.animate().alpha(1f).setDuration(duration).setStartDelay(delay)
+                    .setListener(new AnimatorListenerAdapter() {
+                        @Override
+                        public void onAnimationEnd(Animator animation) {
+                            if (execOnEnd != null) execOnEnd.run();
+                        }
+                    }).start();
+        } else {
+            view.animate().alpha(0f)
+                    .setDuration(duration).setStartDelay(delay)
+                    .setListener(new AnimatorListenerAdapter() {
+                        @Override
+                        public void onAnimationEnd(Animator animation) {
+                            view.setVisibility(View.GONE);
+                            if (execOnEnd != null) execOnEnd.run();
+                        }
+                    })
+                    .start();
+        }
+    }
+
+    protected void setErrorMessage(String message, boolean showRetryButton) {
+        if (errorTextView == null || activity == null) return;
+
+        errorTextView.setText(message);
+        if (showRetryButton) animateView(errorButtonRetry, true, 300);
+        else animateView(errorButtonRetry, false, 0);
+
+        animateView(errorPanel, true, 300);
+        isLoading.set(false);
+
+        animateView(loadingProgressBar, false, 200);
+    }
+
+    protected int getResourceIdFromAttr(@AttrRes int attr) {
+        TypedArray a = activity.getTheme().obtainStyledAttributes(new int[]{attr});
+        int attributeResourceId = a.getResourceId(0, 0);
+        a.recycle();
+        return attributeResourceId;
+    }
+
+    public static void showMenuTooltip(View v, String message) {
+        final int[] screenPos = new int[2];
+        final Rect displayFrame = new Rect();
+        v.getLocationOnScreen(screenPos);
+        v.getWindowVisibleDisplayFrame(displayFrame);
+
+        final Context context = v.getContext();
+        final int width = v.getWidth();
+        final int height = v.getHeight();
+        final int midy = screenPos[1] + height / 2;
+        int referenceX = screenPos[0] + width / 2;
+        if (ViewCompat.getLayoutDirection(v) == View.LAYOUT_DIRECTION_LTR) {
+            final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
+            referenceX = screenWidth - referenceX; // mirror
+        }
+        Toast cheatSheet = Toast.makeText(context, message, Toast.LENGTH_SHORT);
+        if (midy < displayFrame.height()) {
+            // Show along the top; follow action buttons
+            cheatSheet.setGravity(Gravity.TOP | Gravity.END, referenceX,
+                    screenPos[1] + height - displayFrame.top);
+        } else {
+            // Show along the bottom center
+            cheatSheet.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, height);
+        }
+        cheatSheet.show();
+    }
+}

app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java

@@ -0,0 +1,76 @@
+package org.schabi.newpipe.fragments;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.support.v7.app.ActionBar;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.schabi.newpipe.MainActivity;
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.util.NavigationHelper;
+
+public class MainFragment extends Fragment {
+    private final String TAG = "MainFragment@" + Integer.toHexString(hashCode());
+    private static final boolean DEBUG = MainActivity.DEBUG;
+
+    private AppCompatActivity activity;
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Fragment's LifeCycle
+    //////////////////////////////////////////////////////////////////////////*/
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        if (DEBUG) Log.d(TAG, "onAttach() called with: context = [" + context + "]");
+        activity = ((AppCompatActivity) context);
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (DEBUG) Log.d(TAG, "onCreate() called with: savedInstanceState = [" + savedInstanceState + "]");
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        if (DEBUG) Log.d(TAG, "onCreateView() called with: inflater = [" + inflater + "], container = [" + container + "], savedInstanceState = [" + savedInstanceState + "]");
+        return inflater.inflate(R.layout.fragment_main, container, false);
+    }
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Menu
+    //////////////////////////////////////////////////////////////////////////*/
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        super.onCreateOptionsMenu(menu, inflater);
+        if (DEBUG) Log.d(TAG, "onCreateOptionsMenu() called with: menu = [" + menu + "], inflater = [" + inflater + "]");
+        inflater.inflate(R.menu.main_fragment_menu, menu);
+
+        ActionBar supportActionBar = activity.getSupportActionBar();
+        if (supportActionBar != null) {
+            supportActionBar.setDisplayShowTitleEnabled(false);
+            supportActionBar.setDisplayHomeAsUpEnabled(false);
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.action_search:
+                NavigationHelper.openSearch(activity, 0, "");
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+}

app/src/main/java/org/schabi/newpipe/fragments/channel/ChannelFragment.java

@@ -1,6 +1,5 @@
 package org.schabi.newpipe.fragments.channel;
 
-import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
@@ -8,9 +7,9 @@ import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
 import android.support.v4.content.ContextCompat;
 import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
+import android.text.TextUtils;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -20,222 +19,144 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.ImageView;
-import android.widget.ProgressBar;
 import android.widget.TextView;
-import android.widget.Toast;
-
-import com.nostra13.universalimageloader.core.ImageLoader;
 
 import org.schabi.newpipe.ImageErrorLoadingListener;
 import org.schabi.newpipe.R;
-import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.channel.ChannelInfo;
-import org.schabi.newpipe.fragments.OnItemSelectedListener;
+import org.schabi.newpipe.fragments.BaseFragment;
 import org.schabi.newpipe.info_list.InfoItemBuilder;
 import org.schabi.newpipe.info_list.InfoListAdapter;
-import org.schabi.newpipe.report.ErrorActivity;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.workers.ChannelExtractorWorker;
 
+import java.io.Serializable;
 import java.text.NumberFormat;
+import java.util.ArrayList;
 
-import static android.os.Build.VERSION.SDK_INT;
+public class ChannelFragment extends BaseFragment implements ChannelExtractorWorker.OnChannelInfoReceive {
+    private final String TAG = "ChannelFragment@" + Integer.toHexString(hashCode());
 
+    private static final String INFO_LIST_KEY = "info_list_key";
+    private static final String CHANNEL_INFO_KEY = "channel_info_key";
+    private static final String PAGE_NUMBER_KEY = "page_number_key";
 
-/**
- * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
- * ChannelFragment.java is part of NewPipe.
- * <p>
- * NewPipe is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * <p>
- * NewPipe is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * <p>
- * You should have received a copy of the GNU General Public License
- * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-public class ChannelFragment extends Fragment implements ChannelExtractorWorker.OnChannelInfoReceive {
-    private static final String TAG = "ChannelFragment";
-
-    private AppCompatActivity activity;
-    private OnItemSelectedListener onItemSelectedListener;
     private InfoListAdapter infoListAdapter;
 
-    private ChannelExtractorWorker currentExtractorWorker;
+    private ChannelExtractorWorker currentChannelWorker;
     private ChannelInfo currentChannelInfo;
     private int serviceId = -1;
     private String channelName = "";
     private String channelUrl = "";
-
-    private boolean isLoading = false;
     private int pageNumber = 0;
     private boolean hasNextPage = true;
 
-    private ImageLoader imageLoader = ImageLoader.getInstance();
-
     /*//////////////////////////////////////////////////////////////////////////
     // Views
     //////////////////////////////////////////////////////////////////////////*/
 
-    private View rootView = null;
-
     private RecyclerView channelVideosList;
-    private LinearLayoutManager layoutManager;
-    private ProgressBar loadingProgressBar;
 
     private View headerRootLayout;
     private ImageView headerChannelBanner;
     private ImageView headerAvatarView;
     private TextView headerTitleView;
-    private TextView headerSubscriberView;
-    private Button headerSubscriberButton;
-    private View headerSubscriberLayout;
+    private TextView headerSubscribersTextView;
+    private Button headerRssButton;
 
     /*////////////////////////////////////////////////////////////////////////*/
 
     public ChannelFragment() {
     }
 
-    public static ChannelFragment newInstance(int serviceId, String url, String name) {
-        ChannelFragment instance = newInstance();
-
-        Bundle bundle = new Bundle();
-        bundle.putString(Constants.KEY_URL, url);
-        bundle.putString(Constants.KEY_TITLE, name);
-        bundle.putInt(Constants.KEY_SERVICE_ID, serviceId);
-
-        instance.setArguments(bundle);
+    public static Fragment getInstance(int serviceId, String channelUrl, String name) {
+        ChannelFragment instance = new ChannelFragment();
+        instance.setChannel(serviceId, channelUrl, name);
         return instance;
     }
 
-    public static ChannelFragment newInstance() {
-        return new ChannelFragment();
-    }
-
     /*//////////////////////////////////////////////////////////////////////////
     // Fragment's LifeCycle
     //////////////////////////////////////////////////////////////////////////*/
 
-    @Override
-    public void onAttach(Context context) {
-        super.onAttach(context);
-        activity = ((AppCompatActivity) context);
-        onItemSelectedListener = ((OnItemSelectedListener) context);
-    }
-
     @Override
     public void onCreate(Bundle savedInstanceState) {
+        if (DEBUG) Log.d(TAG, "onCreate() called with: savedInstanceState = [" + savedInstanceState + "]");
         super.onCreate(savedInstanceState);
         setHasOptionsMenu(true);
-        isLoading = false;
         if (savedInstanceState != null) {
             channelUrl = savedInstanceState.getString(Constants.KEY_URL);
             channelName = savedInstanceState.getString(Constants.KEY_TITLE);
             serviceId = savedInstanceState.getInt(Constants.KEY_SERVICE_ID, -1);
-        } else {
-            try {
-                Bundle args = getArguments();
-                if (args != null) {
-                    channelUrl = args.getString(Constants.KEY_URL);
-                    channelName = args.getString(Constants.KEY_TITLE);
-                    serviceId = args.getInt(Constants.KEY_SERVICE_ID, 0);
-                }
-            } catch (Exception e) {
-                e.printStackTrace();
-                ErrorActivity.reportError(getActivity(), e, null,
-                        getActivity().findViewById(android.R.id.content),
-                        ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                                NewPipe.getNameOfService(serviceId),
-                                "", R.string.general_error));
-            }
+
+            pageNumber = savedInstanceState.getInt(PAGE_NUMBER_KEY, 0);
+            Serializable serializable = savedInstanceState.getSerializable(CHANNEL_INFO_KEY);
+            if (serializable instanceof ChannelInfo) currentChannelInfo = (ChannelInfo) serializable;
         }
     }
 
     @Override
     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
-        rootView = inflater.inflate(R.layout.fragment_channel, container, false);
-        return rootView;
+        if (DEBUG) Log.d(TAG, "onCreateView() called with: inflater = [" + inflater + "], container = [" + container + "], savedInstanceState = [" + savedInstanceState + "]");
+        return inflater.inflate(R.layout.fragment_channel, container, false);
     }
 
     @Override
     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
-        loadingProgressBar = (ProgressBar) view.findViewById(R.id.loading_progress_bar);
-        channelVideosList = (RecyclerView) view.findViewById(R.id.channel_streams_view);
+        super.onViewCreated(view, savedInstanceState);
 
-        infoListAdapter = new InfoListAdapter(activity, rootView);
-        layoutManager = new LinearLayoutManager(activity);
-        channelVideosList.setLayoutManager(layoutManager);
-
-        headerRootLayout = activity.getLayoutInflater().inflate(R.layout.channel_header, channelVideosList, false);
-        infoListAdapter.setHeader(headerRootLayout);
-        infoListAdapter.setFooter(activity.getLayoutInflater().inflate(R.layout.pignate_footer, channelVideosList, false));
-        channelVideosList.setAdapter(infoListAdapter);
-
-        headerChannelBanner = (ImageView) headerRootLayout.findViewById(R.id.channel_banner_image);
-        headerAvatarView = (ImageView) headerRootLayout.findViewById(R.id.channel_avatar_view);
-        headerTitleView = (TextView) headerRootLayout.findViewById(R.id.channel_title_view);
-        headerSubscriberView = (TextView) headerRootLayout.findViewById(R.id.channel_subscriber_view);
-        headerSubscriberButton = (Button) headerRootLayout.findViewById(R.id.channel_subscribe_button);
-        headerSubscriberLayout = headerRootLayout.findViewById(R.id.channel_subscriber_layout);
-
-        initListeners();
-
-        isLoading = true;
+        if (currentChannelInfo == null) loadPage(0);
+        else handleChannelInfo(currentChannelInfo, false, false);
     }
 
     @Override
     public void onDestroyView() {
-        super.onDestroyView();
+        if (DEBUG) Log.d(TAG, "onDestroyView() called");
         headerAvatarView.setImageBitmap(null);
         headerChannelBanner.setImageBitmap(null);
         channelVideosList.removeAllViews();
 
-        rootView = null;
         channelVideosList = null;
-        layoutManager = null;
-        loadingProgressBar = null;
         headerRootLayout = null;
         headerChannelBanner = null;
         headerAvatarView = null;
         headerTitleView = null;
-        headerSubscriberView = null;
-        headerSubscriberButton = null;
-        headerSubscriberLayout = null;
+        headerSubscribersTextView = null;
+        headerRssButton = null;
+
+        super.onDestroyView();
     }
 
     @Override
     public void onResume() {
+        if (DEBUG) Log.d(TAG, "onResume() called");
         super.onResume();
-        if (isLoading) {
-            requestData(false);
+        if (wasLoading.getAndSet(false) && (currentChannelWorker == null || !currentChannelWorker.isRunning())) {
+            loadPage(pageNumber);
         }
     }
 
     @Override
     public void onStop() {
+        if (DEBUG) Log.d(TAG, "onStop() called");
         super.onStop();
-        if (currentExtractorWorker != null) currentExtractorWorker.cancel();
-    }
-
-    @Override
-    public void onDestroy() {
-        super.onDestroy();
-        imageLoader.clearMemoryCache();
+        wasLoading.set(currentChannelWorker != null && currentChannelWorker.isRunning());
+        if (currentChannelWorker != null && currentChannelWorker.isRunning()) currentChannelWorker.cancel();
     }
 
     @Override
     public void onSaveInstanceState(Bundle outState) {
+        if (DEBUG) Log.d(TAG, "onSaveInstanceState() called with: outState = [" + outState + "]");
         super.onSaveInstanceState(outState);
         outState.putString(Constants.KEY_URL, channelUrl);
         outState.putString(Constants.KEY_TITLE, channelName);
         outState.putInt(Constants.KEY_SERVICE_ID, serviceId);
+
+        outState.putSerializable(INFO_LIST_KEY, ((ArrayList<InfoItem>) infoListAdapter.getItemsList()));
+        outState.putSerializable(CHANNEL_INFO_KEY, currentChannelInfo);
+        outState.putInt(PAGE_NUMBER_KEY, pageNumber);
     }
 
     /*//////////////////////////////////////////////////////////////////////////
@@ -243,6 +164,7 @@ public class ChannelFragment extends Fragment implements ChannelExtractorWorker.
     //////////////////////////////////////////////////////////////////////////*/
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        if (DEBUG) Log.d(TAG, "onCreateOptionsMenu() called with: menu = [" + menu + "], inflater = [" + inflater + "]");
         super.onCreateOptionsMenu(menu, inflater);
         inflater.inflate(R.menu.menu_channel, menu);
 
@@ -250,20 +172,18 @@ public class ChannelFragment extends Fragment implements ChannelExtractorWorker.
         if (supportActionBar != null) {
             supportActionBar.setDisplayShowTitleEnabled(true);
             supportActionBar.setDisplayHomeAsUpEnabled(true);
-            //noinspection deprecation
-            supportActionBar.setNavigationMode(0);
         }
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
+        if (DEBUG) Log.d(TAG, "onOptionsItemSelected() called with: item = [" + item + "]");
         super.onOptionsItemSelected(item);
         switch (item.getItemId()) {
             case R.id.menu_item_openInBrowser: {
                 Intent intent = new Intent();
                 intent.setAction(Intent.ACTION_VIEW);
                 intent.setData(Uri.parse(channelUrl));
-
                 startActivity(Intent.createChooser(intent, getString(R.string.choose_browser)));
                 return true;
             }
@@ -283,79 +203,185 @@ public class ChannelFragment extends Fragment implements ChannelExtractorWorker.
     // Init's
     //////////////////////////////////////////////////////////////////////////*/
 
-    private void initListeners() {
+    @Override
+    protected void initViews(View rootView, Bundle savedInstanceState) {
+        super.initViews(rootView, savedInstanceState);
+
+        channelVideosList = (RecyclerView) rootView.findViewById(R.id.channel_streams_view);
+
+        channelVideosList.setLayoutManager(new LinearLayoutManager(activity));
+        if (infoListAdapter == null) {
+            infoListAdapter = new InfoListAdapter(activity, rootView);
+            if (savedInstanceState != null) {
+                //noinspection unchecked
+                ArrayList<InfoItem> serializable = (ArrayList<InfoItem>) savedInstanceState.getSerializable(INFO_LIST_KEY);
+                infoListAdapter.addInfoItemList(serializable);
+            }
+        }
+
+        channelVideosList.setAdapter(infoListAdapter);
+        headerRootLayout = activity.getLayoutInflater().inflate(R.layout.channel_header, channelVideosList, false);
+        infoListAdapter.setHeader(headerRootLayout);
+        infoListAdapter.setFooter(activity.getLayoutInflater().inflate(R.layout.pignate_footer, channelVideosList, false));
+
+        headerChannelBanner = (ImageView) headerRootLayout.findViewById(R.id.channel_banner_image);
+        headerAvatarView = (ImageView) headerRootLayout.findViewById(R.id.channel_avatar_view);
+        headerTitleView = (TextView) headerRootLayout.findViewById(R.id.channel_title_view);
+        headerSubscribersTextView = (TextView) headerRootLayout.findViewById(R.id.channel_subscriber_view);
+        headerRssButton = (Button) headerRootLayout.findViewById(R.id.channel_rss_button);
+    }
+
+    protected void initListeners() {
+        super.initListeners();
+
         infoListAdapter.setOnStreamInfoItemSelectedListener(new InfoItemBuilder.OnInfoItemSelectedListener() {
             @Override
             public void selected(int serviceId, String url, String title) {
+                if (DEBUG) Log.d(TAG, "selected() called with: serviceId = [" + serviceId + "], url = [" + url + "], title = [" + title + "]");
                 NavigationHelper.openVideoDetail(onItemSelectedListener, serviceId, url, title);
             }
         });
 
-        // detect if list has ben scrolled to the bottom
-        channelVideosList.setOnScrollListener(new RecyclerView.OnScrollListener() {
+        channelVideosList.clearOnScrollListeners();
+        channelVideosList.addOnScrollListener(new RecyclerView.OnScrollListener() {
             @Override
             public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                 int pastVisiblesItems, visibleItemCount, totalItemCount;
                 super.onScrolled(recyclerView, dx, dy);
                 //check for scroll down
                 if (dy > 0) {
+                    LinearLayoutManager layoutManager = (LinearLayoutManager) channelVideosList.getLayoutManager();
+
                     visibleItemCount = layoutManager.getChildCount();
                     totalItemCount = layoutManager.getItemCount();
                     pastVisiblesItems = layoutManager.findFirstVisibleItemPosition();
 
-                    if ((visibleItemCount + pastVisiblesItems) >= totalItemCount && !currentExtractorWorker.isRunning() && hasNextPage) {
+                    if ((visibleItemCount + pastVisiblesItems) >= totalItemCount && (currentChannelWorker == null || !currentChannelWorker.isRunning()) && hasNextPage && !isLoading.get()) {
                         pageNumber++;
-                        requestData(true);
+                        loadMoreVideos();
                     }
                 }
             }
         });
 
-        headerSubscriberButton.setOnClickListener(new View.OnClickListener() {
+        headerRssButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
-                Log.d(TAG, currentChannelInfo.feed_url);
+                if (DEBUG) Log.d(TAG, "onClick() called with: view = [" + view + "] feed url > " + currentChannelInfo.feed_url);
                 Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(currentChannelInfo.feed_url));
                 startActivity(i);
             }
         });
     }
 
+    @Override
+    protected void reloadContent() {
+        if (DEBUG) Log.d(TAG, "reloadContent() called");
+        currentChannelInfo = null;
+        infoListAdapter.clearStreamItemList();
+        loadPage(0);
+    }
+
     /*//////////////////////////////////////////////////////////////////////////
     // Utils
     //////////////////////////////////////////////////////////////////////////*/
+
     private String buildSubscriberString(long count) {
         String out = NumberFormat.getNumberInstance().format(count);
         out += " " + getString(count > 1 ? R.string.subscriber_plural : R.string.subscriber);
         return out;
     }
 
-    private void requestData(boolean onlyVideos) {
-        if (currentExtractorWorker != null && currentExtractorWorker.isRunning()) currentExtractorWorker.cancel();
+    private void loadPage(int page) {
+        if (DEBUG) Log.d(TAG, "loadPage() called with: page = [" + page + "]");
+        if (currentChannelWorker != null && currentChannelWorker.isRunning()) currentChannelWorker.cancel();
+        isLoading.set(true);
+        pageNumber = page;
+        infoListAdapter.showFooter(false);
 
-        isLoading = true;
-        if (!onlyVideos) {
-            //delete already displayed content
-            loadingProgressBar.setVisibility(View.VISIBLE);
-            infoListAdapter.clearSteamItemList();
-            pageNumber = 0;
-            headerSubscriberLayout.setVisibility(View.GONE);
-            headerTitleView.setText(channelName != null ? channelName : "");
-            if (activity.getSupportActionBar() != null) activity.getSupportActionBar().setTitle(channelName != null ? channelName : "");
-            if (SDK_INT >= 21) {
-                headerChannelBanner.setImageDrawable(ContextCompat.getDrawable(activity, R.drawable.channel_banner));
-                headerAvatarView.setImageDrawable(ContextCompat.getDrawable(activity, R.drawable.buddy));
-            }
-            infoListAdapter.showFooter(false);
-        }
+        animateView(loadingProgressBar, true, 200);
+        animateView(errorPanel, false, 200);
 
-        currentExtractorWorker = new ChannelExtractorWorker(activity, serviceId, channelUrl, pageNumber, this);
-        currentExtractorWorker.setOnlyVideos(onlyVideos);
-        currentExtractorWorker.start();
+        imageLoader.cancelDisplayTask(headerChannelBanner);
+        imageLoader.cancelDisplayTask(headerAvatarView);
+
+        headerRssButton.setVisibility(View.GONE);
+        headerSubscribersTextView.setVisibility(View.GONE);
+
+        headerTitleView.setText(channelName != null ? channelName : "");
+        headerChannelBanner.setImageDrawable(ContextCompat.getDrawable(activity, R.drawable.channel_banner));
+        headerAvatarView.setImageDrawable(ContextCompat.getDrawable(activity, R.drawable.buddy));
+        if (activity.getSupportActionBar() != null) activity.getSupportActionBar().setTitle(channelName != null ? channelName : "");
+
+        currentChannelWorker = new ChannelExtractorWorker(activity, serviceId, channelUrl, page, false, this);
+        currentChannelWorker.start();
     }
 
-    private void addVideos(ChannelInfo info) {
-        infoListAdapter.addInfoItemList(info.related_streams);
+    private void loadMoreVideos() {
+        if (DEBUG) Log.d(TAG, "loadMoreVideos() called");
+        if (currentChannelWorker != null && currentChannelWorker.isRunning()) currentChannelWorker.cancel();
+        isLoading.set(true);
+        currentChannelWorker = new ChannelExtractorWorker(activity, serviceId, channelUrl, pageNumber, true, this);
+        currentChannelWorker.start();
+    }
+
+    private void setChannel(int serviceId, String channelUrl, String name) {
+        this.serviceId = serviceId;
+        this.channelUrl = channelUrl;
+        this.channelName = name;
+    }
+
+    private void handleChannelInfo(ChannelInfo info, boolean onlyVideos, boolean addVideos) {
+        currentChannelInfo = info;
+
+        animateView(errorPanel, false, 300);
+        animateView(channelVideosList, true, 200);
+        animateView(loadingProgressBar, false, 200);
+
+        if (!onlyVideos) {
+            headerRootLayout.setVisibility(View.VISIBLE);
+            //animateView(loadingProgressBar, false, 200, null);
+
+            if (!TextUtils.isEmpty(info.channel_name)) {
+                if (activity.getSupportActionBar() != null) activity.getSupportActionBar().setTitle(info.channel_name);
+                headerTitleView.setText(info.channel_name);
+                channelName = info.channel_name;
+            } else channelName = "";
+
+            if (!TextUtils.isEmpty(info.banner_url)) {
+                imageLoader.displayImage(info.banner_url, headerChannelBanner, displayImageOptions,  new ImageErrorLoadingListener(activity, getView(), info.service_id));
+            }
+
+            if (!TextUtils.isEmpty(info.avatar_url)) {
+                headerAvatarView.setVisibility(View.VISIBLE);
+                imageLoader.displayImage(info.avatar_url, headerAvatarView, displayImageOptions, new ImageErrorLoadingListener(activity, getView(), info.service_id));
+            }
+
+            if (info.subscriberCount != -1) {
+                headerSubscribersTextView.setText(buildSubscriberString(info.subscriberCount));
+                headerSubscribersTextView.setVisibility(View.VISIBLE);
+            } else headerSubscribersTextView.setVisibility(View.GONE);
+
+            if (!TextUtils.isEmpty(info.feed_url)) headerRssButton.setVisibility(View.VISIBLE);
+            else headerRssButton.setVisibility(View.INVISIBLE);
+
+            infoListAdapter.showFooter(true);
+        }
+
+        hasNextPage = info.hasNextPage;
+        if (!hasNextPage) infoListAdapter.showFooter(false);
+
+        //if (!listRestored) {
+        if (addVideos) infoListAdapter.addInfoItemList(info.related_streams);
+        //}
+    }
+
+    @Override
+    protected void setErrorMessage(String message, boolean showRetryButton) {
+        super.setErrorMessage(message, showRetryButton);
+
+        animateView(channelVideosList, false, 200);
+        currentChannelInfo = null;
     }
 
     /*//////////////////////////////////////////////////////////////////////////
@@ -363,59 +389,23 @@ public class ChannelFragment extends Fragment implements ChannelExtractorWorker.
     //////////////////////////////////////////////////////////////////////////*/
 
     @Override
-    public void onReceive(ChannelInfo info) {
+    public void onReceive(ChannelInfo info, boolean onlyVideos) {
+        if (DEBUG) Log.d(TAG, "onReceive() called with: info = [" + info + "]");
         if (info == null || isRemoving() || !isVisible()) return;
 
-        currentChannelInfo = info;
-
-        if (!currentExtractorWorker.isOnlyVideos()) {
-            headerRootLayout.setVisibility(View.VISIBLE);
-            loadingProgressBar.setVisibility(View.GONE);
-
-            if (info.channel_name != null && !info.channel_name.isEmpty()) {
-                if (activity.getSupportActionBar() != null) activity.getSupportActionBar().setTitle(info.channel_name);
-                headerTitleView.setText(info.channel_name);
-                channelName = info.channel_name;
-            } else channelName = "";
-
-            if (info.banner_url != null && !info.banner_url.isEmpty()) {
-                imageLoader.displayImage(info.banner_url, headerChannelBanner,
-                        new ImageErrorLoadingListener(activity, rootView, info.service_id));
-            }
-
-            if (info.avatar_url != null && !info.avatar_url.isEmpty()) {
-                headerAvatarView.setVisibility(View.VISIBLE);
-                imageLoader.displayImage(info.avatar_url, headerAvatarView,
-                        new ImageErrorLoadingListener(activity, rootView, info.service_id));
-            }
-
-            if (info.subscriberCount != -1) {
-                headerSubscriberView.setText(buildSubscriberString(info.subscriberCount));
-            }
-
-            if ((info.feed_url != null && !info.feed_url.isEmpty()) || (info.subscriberCount != -1)) {
-                headerSubscriberLayout.setVisibility(View.VISIBLE);
-            }
-
-            if (info.feed_url == null || info.feed_url.isEmpty()) {
-                headerSubscriberButton.setVisibility(View.INVISIBLE);
-            }
-
-            infoListAdapter.showFooter(true);
-        }
-        hasNextPage = info.hasNextPage;
-        if (!hasNextPage) infoListAdapter.showFooter(false);
-        addVideos(info);
-        isLoading = false;
+        handleChannelInfo(info, onlyVideos, true);
+        isLoading.set(false);
     }
 
     @Override
     public void onError(int messageId) {
-        Toast.makeText(activity, messageId, Toast.LENGTH_LONG).show();
+        if (DEBUG) Log.d(TAG, "onError() called with: messageId = [" + messageId + "]");
+        setErrorMessage(getString(messageId), true);
     }
 
     @Override
     public void onUnrecoverableError(Exception exception) {
+        if (DEBUG) Log.d(TAG, "onUnrecoverableError() called with: exception = [" + exception + "]");
         activity.finish();
     }
 }

app/src/main/java/org/schabi/newpipe/fragments/detail/ActionBarHandler.java

@@ -2,13 +2,15 @@ package org.schabi.newpipe.fragments.detail;
 
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
-import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
+import android.view.View;
+import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
+import android.widget.Spinner;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.extractor.MediaFormat;
@@ -19,27 +21,27 @@ import java.util.List;
 
 /**
  * Created by Christian Schabesberger on 18.08.15.
- *
+ * <p>
  * Copyright (C) Christian Schabesberger 2015 <chris.schabesberger@mailbox.org>
  * DetailsMenuHandler.java is part of NewPipe.
- *
+ * <p>
  * NewPipe is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
+ * <p>
  * NewPipe is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
+ * <p>
  * You should have received a copy of the GNU General Public License
  * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 
 class ActionBarHandler {
-    private static final String TAG = ActionBarHandler.class.toString();
+    private static final String TAG = "ActionBarHandler";
 
     private AppCompatActivity activity;
     private int selectedVideoStream = -1;
@@ -52,11 +54,8 @@ class ActionBarHandler {
     // those are edited directly. Typically VideoDetailFragment will implement those callbacks.
     private OnActionListener onShareListener;
     private OnActionListener onOpenInBrowserListener;
-    private OnActionListener onOpenInPopupListener;
     private OnActionListener onDownloadListener;
     private OnActionListener onPlayWithKodiListener;
-    private OnActionListener onPlayAudioListener;
-
 
     // Triggered when a stream related action is triggered.
     public interface OnActionListener {
@@ -67,46 +66,32 @@ class ActionBarHandler {
         this.activity = activity;
     }
 
-    @SuppressWarnings({"deprecation", "ConstantConditions"})
-    public void setupNavMenu(AppCompatActivity activity) {
-        this.activity = activity;
-        try {
-            activity.getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
-        } catch (NullPointerException e) {
-            e.printStackTrace();
+    public void setupStreamList(final List<VideoStream> videoStreams, Spinner toolbarSpinner) {
+        if (activity == null) return;
+        selectedVideoStream = 0;
+
+        // this array will be shown in the dropdown menu for selecting the stream/resolution.
+        String[] itemArray = new String[videoStreams.size()];
+        for (int i = 0; i < videoStreams.size(); i++) {
+            VideoStream item = videoStreams.get(i);
+            itemArray[i] = MediaFormat.getNameById(item.format) + " " + item.resolution;
         }
-    }
 
-    public void setupStreamList(final List<VideoStream> videoStreams) {
-        if (activity != null) {
-            selectedVideoStream = 0;
-
-
-            // this array will be shown in the dropdown menu for selecting the stream/resolution.
-            String[] itemArray = new String[videoStreams.size()];
-            for (int i = 0; i < videoStreams.size(); i++) {
-                VideoStream item = videoStreams.get(i);
-                itemArray[i] = MediaFormat.getNameById(item.format) + " " + item.resolution;
+        int defaultResolutionIndex = Utils.getDefaultResolution(activity, videoStreams);
+        ArrayAdapter<String> itemAdapter = new ArrayAdapter<>(activity.getBaseContext(), android.R.layout.simple_spinner_dropdown_item, itemArray);
+        toolbarSpinner.setAdapter(itemAdapter);
+        toolbarSpinner.setSelection(defaultResolutionIndex);
+        toolbarSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+                selectedVideoStream = position;
             }
-            int defaultResolution = Utils.getDefaultResolution(activity, videoStreams);
 
-            ArrayAdapter<String> itemAdapter = new ArrayAdapter<>(activity.getBaseContext(),
-                    android.R.layout.simple_spinner_dropdown_item, itemArray);
+            @Override
+            public void onNothingSelected(AdapterView<?> parent) {
+            }
+        });
 
-            ActionBar ab = activity.getSupportActionBar();
-            //todo: make this throwsable
-            assert ab != null : "Could not get actionbar";
-            ab.setListNavigationCallbacks(itemAdapter
-                    , new ActionBar.OnNavigationListener() {
-                @Override
-                public boolean onNavigationItemSelected(int itemPosition, long itemId) {
-                    selectedVideoStream = (int) itemId;
-                    return true;
-                }
-            });
-
-            ab.setSelectedNavigationItem(defaultResolution);
-        }
     }
 
     public void setupMenu(Menu menu, MenuInflater inflater) {
@@ -116,55 +101,36 @@ class ActionBarHandler {
         // appcompat itemsinflater.inflate(R.menu.videoitem_detail, menu);
 
         defaultPreferences = PreferenceManager.getDefaultSharedPreferences(activity);
-        inflater.inflate(R.menu.videoitem_detail, menu);
+        inflater.inflate(R.menu.video_detail_menu, menu);
 
-        showPlayWithKodiAction(defaultPreferences
-                .getBoolean(activity.getString(R.string.show_play_with_kodi_key), false));
+        showPlayWithKodiAction(defaultPreferences.getBoolean(activity.getString(R.string.show_play_with_kodi_key), false));
     }
 
     public boolean onItemSelected(MenuItem item) {
         int id = item.getItemId();
         switch (id) {
             case R.id.menu_item_share: {
-                    /*
-                    Intent intent = new Intent();
-                    intent.setAction(Intent.ACTION_SEND);
-                    intent.putExtra(Intent.EXTRA_TEXT, websiteUrl);
-                    intent.setType("text/plain");
-                    activity.startActivity(Intent.createChooser(intent, activity.getString(R.string.share_dialog_title)));
-                    */
-                if(onShareListener != null) {
+                if (onShareListener != null) {
                     onShareListener.onActionSelected(selectedVideoStream);
                 }
                 return true;
             }
             case R.id.menu_item_openInBrowser: {
-                if(onOpenInBrowserListener != null) {
+                if (onOpenInBrowserListener != null) {
                     onOpenInBrowserListener.onActionSelected(selectedVideoStream);
                 }
+                return true;
             }
-            return true;
             case R.id.menu_item_download:
-                if(onDownloadListener != null) {
+                if (onDownloadListener != null) {
                     onDownloadListener.onActionSelected(selectedVideoStream);
                 }
                 return true;
             case R.id.action_play_with_kodi:
-                if(onPlayWithKodiListener != null) {
+                if (onPlayWithKodiListener != null) {
                     onPlayWithKodiListener.onActionSelected(selectedVideoStream);
                 }
                 return true;
-            case R.id.menu_item_play_audio:
-                if(onPlayAudioListener != null) {
-                    onPlayAudioListener.onActionSelected(selectedVideoStream);
-                }
-                return true;
-            case R.id.menu_item_popup: {
-                if(onOpenInPopupListener != null) {
-                    onOpenInPopupListener.onActionSelected(selectedVideoStream);
-                }
-                return true;
-            }
             default:
                 Log.e(TAG, "Menu Item not known");
         }
@@ -183,10 +149,6 @@ class ActionBarHandler {
         onOpenInBrowserListener = listener;
     }
 
-    public void setOnOpenInPopupListener(OnActionListener listener) {
-        onOpenInPopupListener = listener;
-    }
-
     public void setOnDownloadListener(OnActionListener listener) {
         onDownloadListener = listener;
     }
@@ -195,14 +157,6 @@ class ActionBarHandler {
         onPlayWithKodiListener = listener;
     }
 
-    public void setOnPlayAudioListener(OnActionListener listener) {
-        onPlayAudioListener = listener;
-    }
-
-    public void showAudioAction(boolean visible) {
-        menu.findItem(R.id.menu_item_play_audio).setVisible(visible);
-    }
-
     public void showDownloadAction(boolean visible) {
         menu.findItem(R.id.menu_item_download).setVisible(visible);
     }

app/src/main/java/org/schabi/newpipe/fragments/detail/StackItem.java

@@ -1,11 +1,14 @@
 package org.schabi.newpipe.fragments.detail;
 
+import org.schabi.newpipe.extractor.stream_info.StreamInfo;
+
 import java.io.Serializable;
 
 
 @SuppressWarnings("WeakerAccess")
 public class StackItem implements Serializable {
     private String title, url;
+    private StreamInfo info;
 
     public StackItem(String url, String title) {
         this.title = title;
@@ -24,6 +27,14 @@ public class StackItem implements Serializable {
         return url;
     }
 
+    public void setInfo(StreamInfo info) {
+        this.info = info;
+    }
+
+    public StreamInfo getInfo() {
+        return info;
+    }
+
     @Override
     public String toString() {
         return getUrl() + " > " + getTitle();

app/src/main/java/org/schabi/newpipe/fragments/detail/StreamInfoCache.java

@@ -0,0 +1,85 @@
+package org.schabi.newpipe.fragments.detail;
+
+import android.support.annotation.NonNull;
+import android.text.TextUtils;
+import android.util.Log;
+
+import org.schabi.newpipe.MainActivity;
+import org.schabi.newpipe.extractor.stream_info.StreamInfo;
+
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+
+
+@SuppressWarnings("WeakerAccess")
+public class StreamInfoCache {
+    private static String TAG = "StreamInfoCache@";
+    private static final boolean DEBUG = MainActivity.DEBUG;
+    private static final StreamInfoCache instance = new StreamInfoCache();
+    private static final int MAX_ITEMS_ON_CACHE = 20;
+
+    private final LinkedHashMap<String, StreamInfo> myCache = new LinkedHashMap<>();
+
+    private StreamInfoCache() {
+        TAG += "" + Integer.toHexString(hashCode());
+    }
+
+    public static StreamInfoCache getInstance() {
+        if (DEBUG) Log.d(TAG, "getInstance() called");
+        return instance;
+    }
+
+    public boolean hasKey(@NonNull String url) {
+        if (DEBUG) Log.d(TAG, "hasKey() called with: url = [" + url + "]");
+        return !TextUtils.isEmpty(url) && myCache.containsKey(url) && myCache.get(url) != null;
+    }
+
+    public StreamInfo getFromKey(@NonNull String url) {
+        if (DEBUG) Log.d(TAG, "getFromKey() called with: url = [" + url + "]");
+        return myCache.get(url);
+    }
+
+    public void putInfo(@NonNull StreamInfo info) {
+        if (DEBUG) Log.d(TAG, "putInfo() called with: info = [" + info + "]");
+        putInfo(info.webpage_url, info);
+    }
+
+    public void putInfo(@NonNull String url, @NonNull StreamInfo info) {
+        if (DEBUG) Log.d(TAG, "putInfo() called with: url = [" + url + "], info = [" + info + "]");
+        myCache.put(url, info);
+    }
+
+    public void removeInfo(@NonNull StreamInfo info) {
+        if (DEBUG) Log.d(TAG, "removeInfo() called with: info = [" + info + "]");
+        myCache.remove(info.webpage_url);
+    }
+
+    public void removeInfo(@NonNull String url) {
+        if (DEBUG) Log.d(TAG, "removeInfo() called with: url = [" + url + "]");
+        myCache.remove(url);
+    }
+
+    @SuppressWarnings("unused")
+    public void clearCache() {
+        if (DEBUG) Log.d(TAG, "clearCache() called");
+        myCache.clear();
+    }
+
+    public void removeOldEntries() {
+        if (DEBUG) Log.d(TAG, "removeOldEntries() called , size = " + getSize());
+        if (getSize() > MAX_ITEMS_ON_CACHE) {
+            Iterator<String> iterator = myCache.keySet().iterator();
+            while (iterator.hasNext()) {
+                iterator.next();
+                iterator.remove();
+                if (DEBUG) Log.d(TAG, "getSize() = " + getSize());
+                if (getSize() <= MAX_ITEMS_ON_CACHE) break;
+            }
+        }
+    }
+
+    public int getSize() {
+        return myCache.size();
+    }
+
+}

app/src/main/java/org/schabi/newpipe/fragments/search/SearchFragment.java

@@ -3,245 +3,189 @@ package org.schabi.newpipe.fragments.search;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
+import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
-import android.support.v4.app.Fragment;
 import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
-import android.support.v7.widget.SearchView;
+import android.text.Editable;
+import android.text.TextUtils;
+import android.text.TextWatcher;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.animation.DecelerateInterpolator;
+import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputMethodManager;
-import android.widget.ProgressBar;
+import android.widget.AdapterView;
+import android.widget.AutoCompleteTextView;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.ReCaptchaActivity;
-import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.search.SearchEngine;
 import org.schabi.newpipe.extractor.search.SearchResult;
-import org.schabi.newpipe.fragments.OnItemSelectedListener;
+import org.schabi.newpipe.fragments.BaseFragment;
 import org.schabi.newpipe.info_list.InfoItemBuilder;
 import org.schabi.newpipe.info_list.InfoListAdapter;
-import org.schabi.newpipe.report.ErrorActivity;
 import org.schabi.newpipe.util.NavigationHelper;
+import org.schabi.newpipe.workers.SearchWorker;
+import org.schabi.newpipe.workers.SuggestionWorker;
 
+import java.util.ArrayList;
 import java.util.EnumSet;
+import java.util.List;
 
-import static android.app.Activity.RESULT_OK;
-import static org.schabi.newpipe.ReCaptchaActivity.RECAPTCHA_REQUEST;
-
-/**
- * Created by Christian Schabesberger on 02.08.16.
- * <p>
- * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
- * SearchFragment.java is part of NewPipe.
- * <p>
- * NewPipe is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * <p>
- * NewPipe is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * <p>
- * You should have received a copy of the GNU General Public License
- * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-public class SearchFragment extends Fragment implements SearchView.OnQueryTextListener, SearchWorker.SearchWorkerResultListener {
-
-    private static final String TAG = SearchFragment.class.toString();
-
+public class SearchFragment extends BaseFragment implements SuggestionWorker.OnSuggestionResult, SearchWorker.OnSearchResult {
+    private final String TAG = "SearchFragment@" + Integer.toHexString(hashCode());
     // savedInstanceBundle arguments
-    private static final String QUERY = "query";
-    private static final String STREAMING_SERVICE = "streaming_service";
+    private static final String QUERY_KEY = "query_key";
+    private static final String PAGE_NUMBER_KEY = "page_number_key";
+    private static final String SERVICE_KEY = "service_key";
+    private static final String INFO_LIST_KEY = "info_list_key";
+    private static final String WAS_LOADING_KEY = "was_loading_key";
+    private static final String ERROR_KEY = "error_key";
+    private static final String FILTER_CHECKED_ID_KEY = "filter_checked_id_key";
 
-    private int streamingServiceId = -1;
+    /*//////////////////////////////////////////////////////////////////////////
+    // Search
+    //////////////////////////////////////////////////////////////////////////*/
+
+    private int filterItemCheckedId = -1;
+    private EnumSet<SearchEngine.Filter> filter = EnumSet.of(SearchEngine.Filter.CHANNEL, SearchEngine.Filter.STREAM);
+
+    private int serviceId = -1;
     private String searchQuery = "";
-    private boolean isLoading = false;
-
-    @SuppressWarnings("FieldCanBeLocal")
-    private SearchView searchView;
-    private RecyclerView recyclerView;
-    private ProgressBar loadingIndicator;
     private int pageNumber = 0;
+
+    private SearchWorker curSearchWorker;
+    private SuggestionWorker curSuggestionWorker;
     private SuggestionListAdapter suggestionListAdapter;
     private InfoListAdapter infoListAdapter;
-    private LinearLayoutManager streamInfoListLayoutManager;
 
-    private EnumSet<SearchEngine.Filter> filter = EnumSet.of(SearchEngine.Filter.CHANNEL, SearchEngine.Filter.STREAM);
-    private OnItemSelectedListener onItemSelectedListener;
+    /*//////////////////////////////////////////////////////////////////////////
+    // Views
+    //////////////////////////////////////////////////////////////////////////*/
 
-    /**
-     * Mandatory empty constructor for the fragment manager to instantiate the
-     * fragment (e.g. upon screen orientation changes).
-     */
-    public SearchFragment() {
-    }
+    private View searchToolbarContainer;
+    private AutoCompleteTextView searchEditText;
+    private View searchClear;
 
-    @SuppressWarnings("unused")
-    public static SearchFragment newInstance(int streamingServiceId, String searchQuery) {
-        Bundle args = new Bundle();
-        args.putInt(STREAMING_SERVICE, streamingServiceId);
-        args.putString(QUERY, searchQuery);
-        SearchFragment fragment = new SearchFragment();
-        fragment.setArguments(args);
-        return fragment;
+    private RecyclerView resultRecyclerView;
+
+    /*////////////////////////////////////////////////////////////////////////*/
+
+    public static SearchFragment getInstance(int serviceId, String query) {
+        SearchFragment searchFragment = new SearchFragment();
+        searchFragment.setQuery(serviceId, query);
+        return searchFragment;
     }
 
     /*//////////////////////////////////////////////////////////////////////////
     // Fragment's LifeCycle
     //////////////////////////////////////////////////////////////////////////*/
 
-    @Override
-    public void onAttach(Context context) {
-        super.onAttach(context);
-        onItemSelectedListener = ((OnItemSelectedListener) context);
-    }
-
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        searchQuery = "";
-        isLoading = false;
-        if (savedInstanceState != null) {
-            searchQuery = savedInstanceState.getString(QUERY);
-            streamingServiceId = savedInstanceState.getInt(STREAMING_SERVICE);
-        } else {
-            try {
-                Bundle args = getArguments();
-                if (args != null) {
-                    searchQuery = args.getString(QUERY);
-                    streamingServiceId = args.getInt(STREAMING_SERVICE);
-                } else {
-                    streamingServiceId = NewPipe.getIdOfService("Youtube");
-                }
-            } catch (Exception e) {
-                e.printStackTrace();
-                ErrorActivity.reportError(getActivity(), e, null,
-                        getActivity().findViewById(android.R.id.content),
-                        ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                                NewPipe.getNameOfService(streamingServiceId),
-                                "", R.string.general_error));
-            }
-        }
-
+        if (DEBUG) Log.d(TAG, "onCreate() called with: savedInstanceState = [" + savedInstanceState + "]");
         setHasOptionsMenu(true);
-
-        SearchWorker sw = SearchWorker.getInstance();
-        sw.setSearchWorkerResultListener(this);
-    }
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-        View view = inflater.inflate(R.layout.fragment_search, container, false);
-
-        Context context = view.getContext();
-        loadingIndicator = (ProgressBar) view.findViewById(R.id.loading_progress_bar);
-        recyclerView = (RecyclerView) view.findViewById(R.id.list);
-        streamInfoListLayoutManager = new LinearLayoutManager(context);
-        recyclerView.setLayoutManager(streamInfoListLayoutManager);
-
-        infoListAdapter = new InfoListAdapter(getActivity(),
-                getActivity().findViewById(android.R.id.content));
-        infoListAdapter.setFooter(inflater.inflate(R.layout.pignate_footer, recyclerView, false));
-        infoListAdapter.showFooter(false);
-        infoListAdapter.setOnStreamInfoItemSelectedListener(new InfoItemBuilder.OnInfoItemSelectedListener() {
-            @Override
-            public void selected(int serviceId, String url, String title) {
-                NavigationHelper.openVideoDetail(onItemSelectedListener, serviceId, url, title);
-            }
-        });
-        infoListAdapter.setOnChannelInfoItemSelectedListener(new InfoItemBuilder.OnInfoItemSelectedListener() {
-            @Override
-            public void selected(int serviceId, String url, String title) {
-                NavigationHelper.openChannel(onItemSelectedListener, serviceId, url, title);
-            }
-        });
-        recyclerView.setAdapter(infoListAdapter);
-        recyclerView.clearOnScrollListeners();
-        recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
-            @Override
-            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
-                int pastVisiblesItems, visibleItemCount, totalItemCount;
-                super.onScrolled(recyclerView, dx, dy);
-                if (dy > 0) //check for scroll down
-                {
-                    visibleItemCount = streamInfoListLayoutManager.getChildCount();
-                    totalItemCount = streamInfoListLayoutManager.getItemCount();
-                    pastVisiblesItems = streamInfoListLayoutManager.findFirstVisibleItemPosition();
-
-                    if ((visibleItemCount + pastVisiblesItems) >= totalItemCount && !isLoading) {
-                        pageNumber++;
-                        recyclerView.post(new Runnable() {
-                            @Override
-                            public void run() {
-                                infoListAdapter.showFooter(true);
-
-                            }
-                        });
-                        search(searchQuery, pageNumber);
-                    }
-                }
-            }
-        });
-
-        return view;
-    }
-
-    @Override
-    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
-        super.onViewCreated(view, savedInstanceState);
-        if (!searchQuery.isEmpty()) {
-            search(searchQuery);
+        if (savedInstanceState != null) {
+            searchQuery = savedInstanceState.getString(QUERY_KEY);
+            serviceId = savedInstanceState.getInt(SERVICE_KEY, 0);
+            pageNumber = savedInstanceState.getInt(PAGE_NUMBER_KEY, 0);
+            wasLoading.set(savedInstanceState.getBoolean(WAS_LOADING_KEY, false));
+            filterItemCheckedId = savedInstanceState.getInt(FILTER_CHECKED_ID_KEY, 0);
         }
     }
 
     @Override
-    public void onDestroyView() {
-        super.onDestroyView();
-        recyclerView.removeAllViews();
-        infoListAdapter.clearSteamItemList();
-        recyclerView = null;
+    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        if (DEBUG) Log.d(TAG, "onCreateView() called with: inflater = [" + inflater + "], container = [" + container + "], savedInstanceState = [" + savedInstanceState + "]");
+        return inflater.inflate(R.layout.fragment_search, container, false);
+    }
+
+    @Override
+    public void onViewCreated(View rootView, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(rootView, savedInstanceState);
+        if (DEBUG) Log.d(TAG, "onViewCreated() called with: rootView = [" + rootView + "], savedInstanceState = [" + savedInstanceState + "]");
+
+        if (savedInstanceState != null && savedInstanceState.getBoolean(ERROR_KEY, false)) {
+            search(searchQuery, 0, true);
+        }
+
     }
 
     @Override
     public void onResume() {
         super.onResume();
-        if (isLoading && !searchQuery.isEmpty()) {
-            search(searchQuery);
+        if (DEBUG) Log.d(TAG, "onResume() called");
+        if (wasLoading.getAndSet(false) && !TextUtils.isEmpty(searchQuery)) {
+            if (pageNumber > 0) search(searchQuery, pageNumber);
+            else search(searchQuery, 0, true);
         }
     }
 
     @Override
     public void onStop() {
         super.onStop();
-        SearchWorker.getInstance().terminate();
+        if (DEBUG) Log.d(TAG, "onStop() called");
+
+        hideSoftKeyboard(searchEditText);
+
+        wasLoading.set(curSearchWorker != null && curSearchWorker.isRunning());
+        if (curSearchWorker != null && curSearchWorker.isRunning()) curSearchWorker.cancel();
+        if (curSuggestionWorker != null && curSuggestionWorker.isRunning()) curSuggestionWorker.cancel();
+    }
+
+    @Override
+    public void onDestroyView() {
+        if (DEBUG) Log.d(TAG, "onDestroyView() called");
+        unsetSearchListeners();
+
+        resultRecyclerView.removeAllViews();
+
+        searchToolbarContainer = null;
+        searchEditText = null;
+        searchClear = null;
+
+        resultRecyclerView = null;
+
+        super.onDestroyView();
     }
 
     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
-        outState.putString(QUERY, searchQuery);
-        outState.putInt(STREAMING_SERVICE, streamingServiceId);
+        if (DEBUG) Log.d(TAG, "onSaveInstanceState() called with: outState = [" + outState + "]");
+
+        String query = searchEditText != null && !TextUtils.isEmpty(searchEditText.getText().toString())
+                ? searchEditText.getText().toString() : searchQuery;
+        outState.putString(QUERY_KEY, query);
+        outState.putInt(SERVICE_KEY, serviceId);
+        outState.putInt(PAGE_NUMBER_KEY, pageNumber);
+        outState.putSerializable(INFO_LIST_KEY, ((ArrayList<InfoItem>) infoListAdapter.getItemsList()));
+        outState.putBoolean(WAS_LOADING_KEY, curSearchWorker != null && curSearchWorker.isRunning());
+
+        if (errorPanel != null && errorPanel.getVisibility() == View.VISIBLE) outState.putBoolean(ERROR_KEY, true);
+        if (filterItemCheckedId != -1) outState.putInt(FILTER_CHECKED_ID_KEY, filterItemCheckedId);
     }
 
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         switch (requestCode) {
-            case RECAPTCHA_REQUEST:
-                if (resultCode == RESULT_OK && searchQuery.length() != 0) {
-                    search(searchQuery);
+            case ReCaptchaActivity.RECAPTCHA_REQUEST:
+                if (resultCode == Activity.RESULT_OK && searchQuery.length() != 0) {
+                    search(searchQuery, pageNumber, true);
                 } else Log.e(TAG, "ReCaptcha failed");
                 break;
 
@@ -251,6 +195,88 @@ public class SearchFragment extends Fragment implements SearchView.OnQueryTextLi
         }
     }
 
+    /*//////////////////////////////////////////////////////////////////////////
+    // Init's
+    //////////////////////////////////////////////////////////////////////////*/
+
+    @Override
+    protected void initViews(View rootView, Bundle savedInstanceState) {
+        super.initViews(rootView, savedInstanceState);
+        resultRecyclerView = ((RecyclerView) rootView.findViewById(R.id.result_list_view));
+        resultRecyclerView.setLayoutManager(new LinearLayoutManager(activity));
+
+        if (infoListAdapter == null) {
+            infoListAdapter = new InfoListAdapter(getActivity(), getActivity().findViewById(android.R.id.content));
+            if (savedInstanceState != null) {
+                //noinspection unchecked
+                ArrayList<InfoItem> serializable = (ArrayList<InfoItem>) savedInstanceState.getSerializable(INFO_LIST_KEY);
+                infoListAdapter.addInfoItemList(serializable);
+            }
+
+            infoListAdapter.setFooter(activity.getLayoutInflater().inflate(R.layout.pignate_footer, resultRecyclerView, false));
+            infoListAdapter.showFooter(false);
+            infoListAdapter.setOnStreamInfoItemSelectedListener(new InfoItemBuilder.OnInfoItemSelectedListener() {
+                @Override
+                public void selected(int serviceId, String url, String title) {
+                    NavigationHelper.openVideoDetail(onItemSelectedListener, serviceId, url, title);
+                }
+            });
+            infoListAdapter.setOnChannelInfoItemSelectedListener(new InfoItemBuilder.OnInfoItemSelectedListener() {
+                @Override
+                public void selected(int serviceId, String url, String title) {
+                    NavigationHelper.openChannel(onItemSelectedListener, serviceId, url, title);
+                }
+            });
+        }
+
+        resultRecyclerView.setAdapter(infoListAdapter);
+    }
+
+    @Override
+    protected void initListeners() {
+        super.initListeners();
+        resultRecyclerView.clearOnScrollListeners();
+        resultRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
+            @Override
+            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
+                int pastVisiblesItems, visibleItemCount, totalItemCount;
+                super.onScrolled(recyclerView, dx, dy);
+                //check for scroll down
+                if (dy > 0) {
+                    LinearLayoutManager layoutManager = (LinearLayoutManager) resultRecyclerView.getLayoutManager();
+                    visibleItemCount = resultRecyclerView.getLayoutManager().getChildCount();
+                    totalItemCount = resultRecyclerView.getLayoutManager().getItemCount();
+                    pastVisiblesItems = layoutManager.findFirstVisibleItemPosition();
+
+                    if ((visibleItemCount + pastVisiblesItems) >= totalItemCount && !isLoading.get()) {
+                        pageNumber++;
+                        recyclerView.post(new Runnable() {
+                            @Override
+                            public void run() {
+                                infoListAdapter.showFooter(true);
+                            }
+                        });
+                        search(searchQuery, pageNumber);
+                    }
+                }
+            }
+        });
+    }
+
+    @Override
+    protected void reloadContent() {
+        if (DEBUG) Log.d(TAG, "reloadContent() called");
+        if (!TextUtils.isEmpty(searchQuery) || (searchEditText != null && !TextUtils.isEmpty(searchEditText.getText()))) {
+            search(!TextUtils.isEmpty(searchQuery) ? searchQuery : searchEditText.getText().toString(), 0, true);
+        } else {
+            if (searchEditText != null) {
+                searchEditText.setText("");
+                showSoftKeyboard(searchEditText);
+            }
+            animateView(errorPanel, false, 200);
+        }
+    }
+
     /*//////////////////////////////////////////////////////////////////////////
     // Menu
     //////////////////////////////////////////////////////////////////////////*/
@@ -258,22 +284,47 @@ public class SearchFragment extends Fragment implements SearchView.OnQueryTextLi
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         super.onCreateOptionsMenu(menu, inflater);
-        ActionBar supportActionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
-        if (supportActionBar != null) {
-            supportActionBar.setDisplayHomeAsUpEnabled(false);
-            supportActionBar.setDisplayShowTitleEnabled(false);
-            //noinspection deprecation
-            supportActionBar.setNavigationMode(0);
-        }
+        if (DEBUG) Log.d(TAG, "onCreateOptionsMenu() called with: menu = [" + menu + "], inflater = [" + inflater + "]");
         inflater.inflate(R.menu.search_menu, menu);
 
-        MenuItem searchItem = menu.findItem(R.id.action_search);
-        searchView = (SearchView) searchItem.getActionView();
-        setupSearchView(searchView);
+        ActionBar supportActionBar = activity.getSupportActionBar();
+        if (supportActionBar != null) {
+            supportActionBar.setDisplayShowTitleEnabled(false);
+            supportActionBar.setDisplayHomeAsUpEnabled(true);
+        }
+
+        searchToolbarContainer = activity.findViewById(R.id.toolbar_search_container);
+        searchEditText = (AutoCompleteTextView) searchToolbarContainer.findViewById(R.id.toolbar_search_edit_text);
+        searchClear = searchToolbarContainer.findViewById(R.id.toolbar_search_clear);
+        setupSearchView();
+
+        restoreFilterChecked(menu, filterItemCheckedId);
+    }
+
+    private void restoreFilterChecked(Menu menu, int itemId) {
+        if (itemId != -1) {
+            MenuItem item = menu.findItem(itemId);
+            if (item == null) return;
+
+            item.setChecked(true);
+            switch (itemId) {
+                case R.id.menu_filter_all:
+                    filter = EnumSet.of(SearchEngine.Filter.STREAM, SearchEngine.Filter.CHANNEL);
+                    break;
+                case R.id.menu_filter_video:
+                    filter = EnumSet.of(SearchEngine.Filter.STREAM);
+                    break;
+                case R.id.menu_filter_channel:
+                    filter = EnumSet.of(SearchEngine.Filter.CHANNEL);
+                    break;
+            }
+        }
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
+        if (DEBUG) Log.d(TAG, "onOptionsItemSelected() called with: item = [" + item + "]");
+
         switch (item.getItemId()) {
             case R.id.menu_filter_all:
                 changeFilter(item, EnumSet.of(SearchEngine.Filter.STREAM, SearchEngine.Filter.CHANNEL));
@@ -289,119 +340,238 @@ public class SearchFragment extends Fragment implements SearchView.OnQueryTextLi
         }
     }
 
+    /*//////////////////////////////////////////////////////////////////////////
+    // Search
+    //////////////////////////////////////////////////////////////////////////*/
+
+    private TextWatcher textWatcher;
+
+    private void setupSearchView() {
+        searchEditText.setText(searchQuery != null ? searchQuery : "");
+        searchEditText.setHint(getString(R.string.search) + "...");
+        ////searchEditText.setCursorVisible(true);
+
+        suggestionListAdapter = new SuggestionListAdapter(activity);
+        searchEditText.setAdapter(suggestionListAdapter);
+
+
+        if (TextUtils.isEmpty(searchQuery) || TextUtils.isEmpty(searchEditText.getText())) {
+            searchToolbarContainer.setTranslationX(100);
+            searchToolbarContainer.setAlpha(0f);
+            searchToolbarContainer.setVisibility(View.VISIBLE);
+            searchToolbarContainer.animate().translationX(0).alpha(1f).setDuration(400).setInterpolator(new DecelerateInterpolator()).start();
+        } else {
+            searchToolbarContainer.setTranslationX(0);
+            searchToolbarContainer.setAlpha(1f);
+            searchToolbarContainer.setVisibility(View.VISIBLE);
+        }
+
+        //
+        initSearchListeners();
+
+        if (TextUtils.isEmpty(searchQuery)) showSoftKeyboard(searchEditText);
+        else hideSoftKeyboard(searchEditText);
+
+        if (!TextUtils.isEmpty(searchQuery) && searchQuery.length() > 2 && suggestionListAdapter != null && suggestionListAdapter.isEmpty()) {
+            searchSuggestions(searchQuery);
+        }
+    }
+
+    private void initSearchListeners() {
+        searchClear.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (DEBUG) Log.d(TAG, "onClick() called with: v = [" + v + "]");
+                if (TextUtils.isEmpty(searchEditText.getText())) {
+                    NavigationHelper.openMainActivity(activity);
+                    return;
+                }
+
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+                    searchEditText.setText("", false);
+                } else searchEditText.setText("");
+                suggestionListAdapter.updateAdapter(new ArrayList<String>());
+                showSoftKeyboard(searchEditText);
+            }
+        });
+
+        searchClear.setOnLongClickListener(new View.OnLongClickListener() {
+            @Override
+            public boolean onLongClick(View v) {
+                if (DEBUG) Log.d(TAG, "onLongClick() called with: v = [" + v + "]");
+                showMenuTooltip(v, getString(R.string.clear));
+                return true;
+            }
+        });
+
+        searchEditText.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                searchEditText.showDropDown();
+            }
+        });
+
+        searchEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
+            @Override
+            public void onFocusChange(View v, boolean hasFocus) {
+                if (hasFocus) searchEditText.showDropDown();
+            }
+        });
+
+        searchEditText.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                if (DEBUG) Log.d(TAG, "onItemClick() called with: parent = [" + parent + "], view = [" + view + "], position = [" + position + "], id = [" + id + "]");
+                String s = suggestionListAdapter.getSuggestion(position);
+                if (DEBUG) Log.d(TAG, "onItemClick text = " + s);
+                submitQuery(s);
+            }
+        });
+
+
+        if (textWatcher != null) searchEditText.removeTextChangedListener(textWatcher);
+        textWatcher = new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+            }
+
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+            }
+
+            @Override
+            public void afterTextChanged(Editable s) {
+                String newText = searchEditText.getText().toString();
+                if (!TextUtils.isEmpty(newText) && newText.length() > 1) onQueryTextChange(newText);
+            }
+        };
+        searchEditText.addTextChangedListener(textWatcher);
+
+        searchEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
+            @Override
+            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+                if (DEBUG) Log.d(TAG, "onEditorAction() called with: v = [" + v + "], actionId = [" + actionId + "], event = [" + event + "]");
+                if (event != null && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER || event.getAction() == EditorInfo.IME_ACTION_SEARCH)) {
+                    submitQuery(searchEditText.getText().toString());
+                    return true;
+                }
+                return false;
+            }
+        });
+    }
+
+    private void unsetSearchListeners() {
+        searchClear.setOnClickListener(null);
+        searchClear.setOnLongClickListener(null);
+        if (textWatcher != null) searchEditText.removeTextChangedListener(textWatcher);
+        searchEditText.setOnClickListener(null);
+        searchEditText.setOnItemClickListener(null);
+        searchEditText.setOnFocusChangeListener(null);
+        searchEditText.setOnEditorActionListener(null);
+
+        textWatcher = null;
+    }
+
+    public void showSoftKeyboard(View view) {
+        if (DEBUG) Log.d(TAG, "showSoftKeyboard() called with: view = [" + view + "]");
+        if (view == null) return;
+
+        if (view.requestFocus()) {
+            InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
+            imm.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT);
+        }
+    }
+
+    public void hideSoftKeyboard(View view) {
+        if (DEBUG) Log.d(TAG, "hideSoftKeyboard() called with: view = [" + view + "]");
+        if (view == null) return;
+
+        InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
+        imm.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
+
+        view.clearFocus();
+    }
+
     /*//////////////////////////////////////////////////////////////////////////
     // Utils
     //////////////////////////////////////////////////////////////////////////*/
 
     private void changeFilter(MenuItem item, EnumSet<SearchEngine.Filter> filter) {
         this.filter = filter;
+        this.filterItemCheckedId = item.getItemId();
         item.setChecked(true);
-        if (searchQuery != null && !searchQuery.isEmpty()) {
-            Log.e(TAG, "Fuck+ " + searchQuery);
-            search(searchQuery);
-        }
+        if (searchQuery != null && !searchQuery.isEmpty()) search(searchQuery, 0, true);
     }
 
-    private void setupSearchView(SearchView searchView) {
-        suggestionListAdapter = new SuggestionListAdapter(getActivity());
-        searchView.setSuggestionsAdapter(suggestionListAdapter);
-        searchView.setOnSuggestionListener(new SearchSuggestionListener(searchView, suggestionListAdapter));
-        searchView.setOnQueryTextListener(this);
-        if (searchQuery != null && !searchQuery.isEmpty()) {
-            searchView.setQuery(searchQuery, false);
-            searchView.setIconifiedByDefault(false);
-        }
-    }
-
-    private void search(String query) {
-        infoListAdapter.clearSteamItemList();
-        infoListAdapter.showFooter(false);
-        pageNumber = 0;
+    public void submitQuery(String query) {
+        if (DEBUG) Log.d(TAG, "submitQuery() called with: query = [" + query + "]");
+        if (query.isEmpty()) return;
+        search(query, 0, true);
         searchQuery = query;
-        search(query, pageNumber);
-        hideBackground();
-        loadingIndicator.setVisibility(View.VISIBLE);
     }
 
-    private void search(String query, int page) {
-        isLoading = true;
-        SearchWorker sw = SearchWorker.getInstance();
-        sw.search(streamingServiceId,
-                query,
-                page,
-                getActivity(),
-                filter);
+    public void onQueryTextChange(String newText) {
+        if (DEBUG) Log.d(TAG, "onQueryTextChange() called with: newText = [" + newText + "]");
+        if (!newText.isEmpty()) searchSuggestions(newText);
     }
 
-    private void setDoneLoading() {
-        isLoading = false;
-        loadingIndicator.setVisibility(View.GONE);
-        infoListAdapter.showFooter(false);
-    }
-
-    /**
-     * Hides the "dummy" background when no results are shown
-     */
-    private void hideBackground() {
-        View view = getView();
-        if (view == null) return;
-        view.findViewById(R.id.mainBG).setVisibility(View.GONE);
+    private void setQuery(int serviceId, String searchQuery) {
+        this.serviceId = serviceId;
+        this.searchQuery = searchQuery;
     }
 
     private void searchSuggestions(String query) {
-        SuggestionSearchRunnable suggestionSearchRunnable =
-                new SuggestionSearchRunnable(streamingServiceId, query, getActivity(), suggestionListAdapter);
-        Thread suggestionThread = new Thread(suggestionSearchRunnable);
-        suggestionThread.start();
+        if (DEBUG) Log.d(TAG, "searchSuggestions() called with: query = [" + query + "]");
+        if (curSuggestionWorker != null && curSuggestionWorker.isRunning()) curSuggestionWorker.cancel();
+        curSuggestionWorker = SuggestionWorker.startForQuery(activity, serviceId, query, this);
     }
 
-    public boolean isMainBgVisible() {
-        return getActivity().findViewById(R.id.mainBG).getVisibility() == View.VISIBLE;
+    private void search(String query, int pageNumber) {
+        if (DEBUG) Log.d(TAG, "search() called with: query = [" + query + "], pageNumber = [" + pageNumber + "]");
+        search(query, pageNumber, false);
+    }
+
+    private void search(String query, int pageNumber, boolean clearList) {
+        if (DEBUG) Log.d(TAG, "search() called with: query = [" + query + "], pageNumber = [" + pageNumber + "], clearList = [" + clearList + "]");
+        isLoading.set(true);
+        hideSoftKeyboard(searchEditText);
+
+        searchQuery = query;
+        this.pageNumber = pageNumber;
+
+        if (clearList) {
+            animateView(resultRecyclerView, false, 50);
+            infoListAdapter.clearStreamItemList();
+            infoListAdapter.showFooter(false);
+            animateView(loadingProgressBar, true, 200);
+        }
+        animateView(errorPanel, false, 200);
+
+        if (curSearchWorker != null && curSearchWorker.isRunning()) curSearchWorker.cancel();
+        curSearchWorker = SearchWorker.startForQuery(activity, serviceId, query, pageNumber, filter, this);
+    }
+
+    protected void setErrorMessage(String message, boolean showRetryButton) {
+        super.setErrorMessage(message, showRetryButton);
+
+        animateView(resultRecyclerView, false, 400);
+        hideSoftKeyboard(searchEditText);
     }
 
     /*//////////////////////////////////////////////////////////////////////////
-    // OnQueryTextListener
+    // OnSuggestionResult
     //////////////////////////////////////////////////////////////////////////*/
 
     @Override
-    public boolean onQueryTextSubmit(String query) {
-        Activity a = getActivity();
-        try {
-            search(query);
-
-            // hide virtual keyboard
-            InputMethodManager inputManager =
-                    (InputMethodManager) a.getSystemService(Context.INPUT_METHOD_SERVICE);
-            try {
-                //noinspection ConstantConditions
-                inputManager.hideSoftInputFromWindow(
-                        a.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
-            } catch (NullPointerException e) {
-                e.printStackTrace();
-                ErrorActivity.reportError(a, e, null,
-                        a.findViewById(android.R.id.content),
-                        ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                                NewPipe.getNameOfService(streamingServiceId),
-                                "Could not get widget with focus", R.string.general_error));
-            }
-            // clear focus
-            // 1. to not open up the keyboard after switching back to this
-            // 2. It's a workaround to a seeming bug by the Android OS it self, causing
-            //    onQueryTextSubmit to trigger twice when focus is not cleared.
-            // See: http://stackoverflow.com/questions/17874951/searchview-onquerytextsubmit-runs-twice-while-i-pressed-once
-            a.getCurrentFocus().clearFocus();
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-        return true;
+    public void onSuggestionResult(@NonNull List<String> suggestions) {
+        if (DEBUG) Log.d(TAG, "onSuggestionResult() called with: suggestions = [" + suggestions + "]");
+        suggestionListAdapter.updateAdapter(suggestions);
     }
 
     @Override
-    public boolean onQueryTextChange(String newText) {
-        if (!newText.isEmpty()) {
-            searchSuggestions(newText);
-        }
-        return true;
+    public void onSuggestionError(int messageId) {
+        if (DEBUG) Log.d(TAG, "onSuggestionError() called with: messageId = [" + messageId + "]");
+        setErrorMessage(getString(messageId), true);
     }
 
     /*//////////////////////////////////////////////////////////////////////////
@@ -409,32 +579,35 @@ public class SearchFragment extends Fragment implements SearchView.OnQueryTextLi
     //////////////////////////////////////////////////////////////////////////*/
 
     @Override
-    public void onResult(SearchResult result) {
+    public void onSearchResult(SearchResult result) {
+        if (DEBUG) Log.d(TAG, "onSearchResult() called with: result = [" + result + "]");
         infoListAdapter.addInfoItemList(result.resultList);
-        setDoneLoading();
+        animateView(resultRecyclerView, true, 400);
+        animateView(loadingProgressBar, false, 200);
+        isLoading.set(false);
     }
 
     @Override
-    public void onNothingFound(int stringResource) {
-        //setListShown(true);
-        Toast.makeText(getActivity(), getString(stringResource), Toast.LENGTH_SHORT).show();
-        setDoneLoading();
+    public void onNothingFound(String message) {
+        if (DEBUG) Log.d(TAG, "onNothingFound() called with: messageId = [" + message + "]");
+        setErrorMessage(message, false);
     }
 
     @Override
-    public void onError(String message) {
-        //setListShown(true);
-        Toast.makeText(getActivity(), message, Toast.LENGTH_LONG).show();
-        setDoneLoading();
+    public void onSearchError(int messageId) {
+        if (DEBUG) Log.d(TAG, "onSearchError() called with: messageId = [" + messageId + "]");
+        //Toast.makeText(getActivity(), messageId, Toast.LENGTH_LONG).show();
+        setErrorMessage(getString(messageId), true);
     }
 
     @Override
     public void onReCaptchaChallenge() {
-        Toast.makeText(getActivity(), "ReCaptcha Challenge requested",
-                Toast.LENGTH_LONG).show();
+        if (DEBUG) Log.d(TAG, "onReCaptchaChallenge() called");
+        Toast.makeText(getActivity(), R.string.recaptcha_request_toast, Toast.LENGTH_LONG).show();
+        setErrorMessage(getString(R.string.recaptcha_request_toast), false);
 
         // Starting ReCaptcha Challenge Activity
-        startActivityForResult(new Intent(getActivity(), ReCaptchaActivity.class), RECAPTCHA_REQUEST);
+        startActivityForResult(new Intent(getActivity(), ReCaptchaActivity.class), ReCaptchaActivity.RECAPTCHA_REQUEST);
     }
 
 }

app/src/main/java/org/schabi/newpipe/fragments/search/SearchWorker.java

@@ -1,216 +0,0 @@
-package org.schabi.newpipe.fragments.search;
-
-import android.app.Activity;
-import android.content.SharedPreferences;
-import android.os.Handler;
-import android.preference.PreferenceManager;
-import android.util.Log;
-import android.view.View;
-
-import org.schabi.newpipe.R;
-import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
-import org.schabi.newpipe.extractor.search.SearchEngine;
-import org.schabi.newpipe.extractor.search.SearchResult;
-import org.schabi.newpipe.report.ErrorActivity;
-
-import java.io.IOException;
-import java.util.EnumSet;
-
-/**
- * Created by Christian Schabesberger on 02.08.16.
- *
- * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
- * SearchWorker.java is part of NewPipe.
- *
- * NewPipe is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * NewPipe is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-
-public class SearchWorker {
-    private static final String TAG = SearchWorker.class.toString();
-
-    public interface SearchWorkerResultListener {
-        void onResult(SearchResult result);
-        void onNothingFound(final int stringResource);
-        void onError(String message);
-        void onReCaptchaChallenge();
-    }
-
-    private class ResultRunnable implements Runnable {
-        private final SearchResult result;
-        private int requestId = 0;
-        public ResultRunnable(SearchResult result, int requestId) {
-            this.result = result;
-            this.requestId = requestId;
-        }
-        @Override
-        public void run() {
-            if(this.requestId == SearchWorker.this.requestId) {
-                searchWorkerResultListener.onResult(result);
-            }
-        }
-    }
-
-    private class SearchRunnable implements Runnable {
-        public static final String YOUTUBE = "Youtube";
-        private final String query;
-        private final int page;
-        private final EnumSet<SearchEngine.Filter> filter;
-        final Handler h = new Handler();
-        private volatile boolean runs = true;
-        private Activity a = null;
-        private int serviceId = -1;
-        public SearchRunnable(int serviceId,
-                              String query,
-                              int page,
-                              EnumSet<SearchEngine.Filter> filter,
-                              Activity activity,
-                              int requestId) {
-            this.serviceId = serviceId;
-            this.query = query;
-            this.page = page;
-            this.filter = filter;
-            this.a = activity;
-        }
-        void terminate() {
-            runs = false;
-        }
-        @Override
-        public void run() {
-            final String serviceName = NewPipe.getNameOfService(serviceId);
-            SearchResult result = null;
-            SearchEngine engine = null;
-
-            try {
-                engine = NewPipe.getService(serviceId)
-                        .getSearchEngineInstance();
-            } catch(ExtractionException e) {
-                ErrorActivity.reportError(h, a, e, null, null,
-                        ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                                Integer.toString(serviceId), query, R.string.general_error));
-                return;
-            }
-
-            try {
-                SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(a);
-                String searchLanguageKey = a.getString(R.string.search_language_key);
-                String searchLanguage = sp.getString(searchLanguageKey,
-                        a.getString(R.string.default_language_value));
-                result = SearchResult
-                        .getSearchResult(engine, query, page, searchLanguage, filter);
-                if(runs) {
-                    h.post(new ResultRunnable(result, requestId));
-                }
-
-                // look for errors during extraction
-                // soft errors:
-                View rootView = a.findViewById(android.R.id.content);
-                if(result != null &&
-                        !result.errors.isEmpty()) {
-                    Log.e(TAG, "OCCURRED ERRORS DURING SEARCH EXTRACTION:");
-                    for(Throwable e : result.errors) {
-                        e.printStackTrace();
-                        Log.e(TAG, "------");
-                    }
-
-                    if(result.resultList.isEmpty()&& !result.errors.isEmpty()) {
-                        // if it compleatly failes dont show snackbar, instead show error directlry
-                        ErrorActivity.reportError(h, a, result.errors, null, null,
-                                ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                                        serviceName, query, R.string.parsing_error));
-                    } else {
-                        // if it partly show snackbar
-                        ErrorActivity.reportError(h, a, result.errors, null, rootView,
-                                ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                                        serviceName, query, R.string.light_parsing_error));
-                    }
-                }
-                // hard errors:
-            } catch (ReCaptchaException e) {
-                h.post(new Runnable() {
-                    @Override
-                    public void run() {
-                        searchWorkerResultListener.onReCaptchaChallenge();
-                    }
-                });
-            } catch(IOException e) {
-                h.post(new Runnable() {
-                    @Override
-                    public void run() {
-                        searchWorkerResultListener.onNothingFound(R.string.network_error);
-                    }
-                });
-                e.printStackTrace();
-            } catch(final SearchEngine.NothingFoundException e) {
-                h.post(new Runnable() {
-                    @Override
-                    public void run() {
-                        searchWorkerResultListener.onError(e.getMessage());
-                    }
-                });
-            } catch(ExtractionException e) {
-                ErrorActivity.reportError(h, a, e, null, null,
-                        ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                                serviceName, query, R.string.parsing_error));
-                //postNewErrorToast(h, R.string.parsing_error);
-                e.printStackTrace();
-
-            } catch(Exception e) {
-                ErrorActivity.reportError(h, a, e, null, null,
-                        ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                        /* todo: this shoudl not be assigned static */ YOUTUBE, query, R.string.general_error));
-
-                e.printStackTrace();
-            }
-        }
-    }
-
-    private static SearchWorker searchWorker = null;
-    private SearchWorkerResultListener searchWorkerResultListener = null;
-    private SearchRunnable runnable = null;
-    private int requestId = 0;     //prevents running requests that have already ben expired
-
-    public static SearchWorker getInstance() {
-        return searchWorker == null ? (searchWorker = new SearchWorker()) : searchWorker;
-    }
-
-    public void setSearchWorkerResultListener(SearchWorkerResultListener listener) {
-        searchWorkerResultListener = listener;
-    }
-
-    private SearchWorker() {
-
-    }
-
-    public void search(int serviceId,
-                       String query,
-                       int page,
-                       Activity a,
-                       EnumSet<SearchEngine.Filter> filter) {
-        if(runnable != null) {
-            terminate();
-        }
-        runnable = new SearchRunnable(serviceId, query, page, filter, a, requestId);
-        Thread thread = new Thread(runnable);
-        thread.start();
-    }
-
-    public void terminate() {
-        if (runnable == null) return;
-        requestId++;
-        runnable.terminate();
-    }
-}

app/src/main/java/org/schabi/newpipe/fragments/search/SuggestionListAdapter.java

@@ -75,6 +75,11 @@ public class SuggestionListAdapter extends ResourceCursorAdapter {
         return ((Cursor) getItem(position)).getString(INDEX_TITLE);
     }
 
+    @Override
+    public CharSequence convertToString(Cursor cursor) {
+        return cursor.getString(INDEX_TITLE);
+    }
+
     private class ViewHolder {
         private final TextView suggestionTitle;
         private ViewHolder(View view) {

app/src/main/java/org/schabi/newpipe/fragments/search/SuggestionSearchRunnable.java

@@ -1,105 +0,0 @@
-package org.schabi.newpipe.fragments.search;
-
-import android.app.Activity;
-import android.content.SharedPreferences;
-import android.os.Handler;
-import android.preference.PreferenceManager;
-import android.widget.Toast;
-
-import org.schabi.newpipe.R;
-import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.SuggestionExtractor;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.report.ErrorActivity;
-
-import java.io.IOException;
-import java.util.List;
-
-/**
- * Created by Christian Schabesberger on 02.08.16.
- *
- * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
- * SuggestionSearchRunnable.java is part of NewPipe.
- *
- * NewPipe is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * NewPipe is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-public class SuggestionSearchRunnable implements Runnable{
-
-    /**
-     * Runnable to update a {@link SuggestionListAdapter}
-     */
-    private class SuggestionResultRunnable implements Runnable{
-
-        private final List<String> suggestions;
-
-        private SuggestionResultRunnable(List<String> suggestions) {
-            this.suggestions = suggestions;
-        }
-
-        @Override
-        public void run() {
-            adapter.updateAdapter(suggestions);
-        }
-    }
-
-    private final int serviceId;
-    private final String query;
-    private final Handler h = new Handler();
-    private final Activity a;
-    private final SuggestionListAdapter adapter;
-    public SuggestionSearchRunnable(int serviceId, String query,
-                                     Activity activity, SuggestionListAdapter adapter) {
-        this.serviceId = serviceId;
-        this.query = query;
-        this.a = activity;
-        this.adapter = adapter;
-    }
-
-    @Override
-    public void run() {
-        try {
-            SuggestionExtractor se =
-                    NewPipe.getService(serviceId).getSuggestionExtractorInstance();
-            SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(a);
-            String searchLanguageKey = a.getString(R.string.search_language_key);
-            String searchLanguage = sp.getString(searchLanguageKey,
-                    a.getString(R.string.default_language_value));
-            List<String> suggestions = se.suggestionList(query, searchLanguage);
-            h.post(new SuggestionResultRunnable(suggestions));
-        } catch (ExtractionException e) {
-            ErrorActivity.reportError(h, a, e, null, a.findViewById(android.R.id.content),
-                    ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                            NewPipe.getNameOfService(serviceId), query, R.string.parsing_error));
-            e.printStackTrace();
-        } catch (IOException e) {
-            postNewErrorToast(h, R.string.network_error);
-            e.printStackTrace();
-        } catch (Exception e) {
-            ErrorActivity.reportError(h, a, e, null, a.findViewById(android.R.id.content),
-                    ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED,
-                            NewPipe.getNameOfService(serviceId), query, R.string.general_error));
-        }
-    }
-
-    private void postNewErrorToast(Handler h, final int stringResource) {
-        h.post(new Runnable() {
-            @Override
-            public void run() {
-                Toast.makeText(a, a.getString(stringResource),
-                        Toast.LENGTH_SHORT).show();
-            }
-        });
-    }
-}

app/src/main/java/org/schabi/newpipe/info_list/ChannelInfoItemHolder.java

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.info_list;
 
 import android.view.View;
-import android.widget.Button;
 import android.widget.TextView;
 
 import org.schabi.newpipe.R;
@@ -35,16 +34,17 @@ public class ChannelInfoItemHolder extends InfoItemHolder {
     public final TextView itemSubscriberCountView;
     public final TextView itemVideoCountView;
     public final TextView itemChannelDescriptionView;
-    public final Button itemButton;
+
+    public final View itemRoot;
 
     ChannelInfoItemHolder(View v) {
         super(v);
+        itemRoot = v.findViewById(R.id.itemRoot);
         itemThumbnailView = (CircleImageView) v.findViewById(R.id.itemThumbnailView);
         itemChannelTitleView = (TextView) v.findViewById(R.id.itemChannelTitleView);
         itemSubscriberCountView = (TextView) v.findViewById(R.id.itemSubscriberCountView);
         itemVideoCountView = (TextView) v.findViewById(R.id.itemVideoCountView);
         itemChannelDescriptionView = (TextView) v.findViewById(R.id.itemChannelDescriptionView);
-        itemButton = (Button) v.findViewById(R.id.item_button);
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/info_list/InfoItemBuilder.java

@@ -1,6 +1,7 @@
 package org.schabi.newpipe.info_list;
 
 import android.content.Context;
+import android.text.TextUtils;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -18,20 +19,20 @@ import org.schabi.newpipe.extractor.stream_info.StreamInfoItem;
 
 /**
  * Created by Christian Schabesberger on 26.09.16.
- *
+ * <p>
  * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
  * InfoItemBuilder.java is part of NewPipe.
- *
+ * <p>
  * NewPipe is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
+ * <p>
  * NewPipe is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
+ * <p>
  * You should have received a copy of the GNU General Public License
  * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
  */
@@ -48,11 +49,13 @@ public class InfoItemBuilder {
     private final String billion;
 
     private static final String TAG = InfoItemBuilder.class.toString();
+
     public interface OnInfoItemSelectedListener {
         void selected(int serviceId, String url, String title);
     }
 
     private Context mContext = null;
+    private LayoutInflater inflater;
     private View rootView = null;
     private ImageLoader imageLoader = ImageLoader.getInstance();
     private DisplayImageOptions displayImageOptions =
@@ -70,6 +73,7 @@ public class InfoItemBuilder {
         thousand = context.getString(R.string.short_thousand);
         million = context.getString(R.string.short_million);
         billion = context.getString(R.string.short_billion);
+        inflater = LayoutInflater.from(context);
     }
 
     public void setOnStreamInfoItemSelectedListener(
@@ -83,9 +87,9 @@ public class InfoItemBuilder {
     }
 
     public void buildByHolder(InfoItemHolder holder, final InfoItem i) {
-        if(i.infoType() != holder.infoType())
+        if (i.infoType() != holder.infoType())
             return;
-        switch(i.infoType()) {
+        switch (i.infoType()) {
             case STREAM:
                 buildStreamInfoItem((StreamInfoItemHolder) holder, (StreamInfoItem) i);
                 break;
@@ -103,15 +107,15 @@ public class InfoItemBuilder {
     public View buildView(ViewGroup parent, final InfoItem info) {
         View itemView = null;
         InfoItemHolder holder = null;
-        switch(info.infoType()) {
+        switch (info.infoType()) {
             case STREAM:
-                itemView = LayoutInflater.from(parent.getContext())
-                        .inflate(R.layout.stream_item, parent, false);
+                //long start = System.nanoTime();
+                itemView = inflater.inflate(R.layout.stream_item, parent, false);
+                //Log.d(TAG, "time to inflate: " + ((System.nanoTime() - start) / 1000000L) + "ms");
                 holder = new StreamInfoItemHolder(itemView);
                 break;
             case CHANNEL:
-                itemView = LayoutInflater.from(parent.getContext())
-                        .inflate(R.layout.channel_item, parent, false);
+                itemView = inflater.inflate(R.layout.channel_item, parent, false);
                 holder = new ChannelInfoItemHolder(itemView);
                 break;
             case PLAYLIST:
@@ -124,43 +128,39 @@ public class InfoItemBuilder {
     }
 
     private void buildStreamInfoItem(StreamInfoItemHolder holder, final StreamInfoItem info) {
-        if(info.infoType() != InfoItem.InfoType.STREAM) {
+        if (info.infoType() != InfoItem.InfoType.STREAM) {
             Log.e("InfoItemBuilder", "Info type not yet supported");
         }
         // fill holder with information
-        holder.itemVideoTitleView.setText(info.title);
-        if(info.uploader != null && !info.uploader.isEmpty()) {
-            holder.itemUploaderView.setText(info.uploader);
-        } else {
-            holder.itemUploaderView.setVisibility(View.INVISIBLE);
-        }
-        if(info.duration > 0) {
+        if (!TextUtils.isEmpty(info.title)) holder.itemVideoTitleView.setText(info.title);
+
+        if (!TextUtils.isEmpty(info.uploader)) holder.itemUploaderView.setText(info.uploader);
+        else holder.itemUploaderView.setVisibility(View.INVISIBLE);
+
+        if (info.duration > 0) {
             holder.itemDurationView.setText(getDurationString(info.duration));
         } else {
-            if(info.stream_type == AbstractStreamInfo.StreamType.LIVE_STREAM) {
+            if (info.stream_type == AbstractStreamInfo.StreamType.LIVE_STREAM) {
                 holder.itemDurationView.setText(R.string.duration_live);
             } else {
                 holder.itemDurationView.setVisibility(View.GONE);
             }
         }
-        if(info.view_count >= 0) {
+        if (info.view_count >= 0) {
             holder.itemViewCountView.setText(shortViewCount(info.view_count));
         } else {
             holder.itemViewCountView.setVisibility(View.GONE);
         }
-        if(info.upload_date != null && !info.upload_date.isEmpty()) {
-            holder.itemUploadDateView.setText(info.upload_date + " • ");
-        }
+        if (!TextUtils.isEmpty(info.upload_date)) holder.itemUploadDateView.setText(info.upload_date + " • ");
 
         holder.itemThumbnailView.setImageResource(R.drawable.dummy_thumbnail);
-        if(info.thumbnail_url != null && !info.thumbnail_url.isEmpty()) {
+        if (!TextUtils.isEmpty(info.thumbnail_url)) {
             imageLoader.displayImage(info.thumbnail_url,
-                    holder.itemThumbnailView,
-                    displayImageOptions,
+                    holder.itemThumbnailView, displayImageOptions,
                     new ImageErrorLoadingListener(mContext, rootView, info.service_id));
         }
 
-        holder.itemButton.setOnClickListener(new View.OnClickListener() {
+        holder.itemRoot.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
                 onStreamInfoItemSelectedListener.selected(info.service_id, info.webpage_url, info.getTitle());
@@ -169,20 +169,20 @@ public class InfoItemBuilder {
     }
 
     private void buildChannelInfoItem(ChannelInfoItemHolder holder, final ChannelInfoItem info) {
-        holder.itemChannelTitleView.setText(info.getTitle());
+        if (!TextUtils.isEmpty(info.getTitle())) holder.itemChannelTitleView.setText(info.getTitle());
         holder.itemSubscriberCountView.setText(shortSubscriber(info.subscriberCount) + " • ");
         holder.itemVideoCountView.setText(info.videoAmount + " " + videosS);
-        holder.itemChannelDescriptionView.setText(info.description);
+        if (!TextUtils.isEmpty(info.description)) holder.itemChannelDescriptionView.setText(info.description);
 
         holder.itemThumbnailView.setImageResource(R.drawable.buddy_channel_item);
-        if(info.thumbnailUrl != null && !info.thumbnailUrl.isEmpty()) {
+        if (!TextUtils.isEmpty(info.thumbnailUrl)) {
             imageLoader.displayImage(info.thumbnailUrl,
                     holder.itemThumbnailView,
                     displayImageOptions,
                     new ImageErrorLoadingListener(mContext, rootView, info.serviceId));
         }
 
-        holder.itemButton.setOnClickListener(new View.OnClickListener() {
+        holder.itemRoot.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
                 onChannelInfoItemSelectedListener.selected(info.serviceId, info.getLink(), info.channelName);
@@ -191,15 +191,15 @@ public class InfoItemBuilder {
     }
 
 
-    public String shortViewCount(Long viewCount){
-        if(viewCount >= 1000000000){
-            return Long.toString(viewCount/1000000000)+ billion + " " + viewsS;
-        }else if(viewCount>=1000000){
-            return Long.toString(viewCount/1000000)+ million + " " + viewsS;
-        }else if(viewCount>=1000){
-            return Long.toString(viewCount/1000)+ thousand + " " + viewsS;
-        }else {
-            return Long.toString(viewCount)+ " " + viewsS;
+    public String shortViewCount(Long viewCount) {
+        if (viewCount >= 1000000000) {
+            return Long.toString(viewCount / 1000000000) + billion + " " + viewsS;
+        } else if (viewCount >= 1000000) {
+            return Long.toString(viewCount / 1000000) + million + " " + viewsS;
+        } else if (viewCount >= 1000) {
+            return Long.toString(viewCount / 1000) + thousand + " " + viewsS;
+        } else {
+            return Long.toString(viewCount) + " " + viewsS;
         }
     }
 
@@ -227,13 +227,13 @@ public class InfoItemBuilder {
         int seconds = duration % 60;
 
         //handle days
-        if(days > 0) {
+        if (days > 0) {
             output = Integer.toString(days) + ":";
         }
         // handle hours
-        if(hours > 0 || !output.isEmpty()) {
-            if(hours > 0) {
-                if(hours >= 10 || output.isEmpty()) {
+        if (hours > 0 || !output.isEmpty()) {
+            if (hours > 0) {
+                if (hours >= 10 || output.isEmpty()) {
                     output += Integer.toString(hours);
                 } else {
                     output += "0" + Integer.toString(hours);
@@ -244,9 +244,9 @@ public class InfoItemBuilder {
             output += ":";
         }
         //handle minutes
-        if(minutes > 0 || !output.isEmpty()) {
-            if(minutes > 0) {
-                if(minutes >= 10 || output.isEmpty()) {
+        if (minutes > 0 || !output.isEmpty()) {
+            if (minutes > 0) {
+                if (minutes >= 10 || output.isEmpty()) {
                     output += Integer.toString(minutes);
                 } else {
                     output += "0" + Integer.toString(minutes);
@@ -258,11 +258,11 @@ public class InfoItemBuilder {
         }
 
         //handle seconds
-        if(output.isEmpty()) {
+        if (output.isEmpty()) {
             output += "0:";
         }
 
-        if(seconds >= 10) {
+        if (seconds >= 10) {
             output += Integer.toString(seconds);
         } else {
             output += "0" + Integer.toString(seconds);

app/src/main/java/org/schabi/newpipe/info_list/InfoListAdapter.java

@@ -10,8 +10,8 @@ import android.view.ViewGroup;
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.extractor.InfoItem;
 
+import java.util.ArrayList;
 import java.util.List;
-import java.util.Vector;
 
 /**
  * Created by Christian Schabesberger on 01.08.16.
@@ -57,7 +57,7 @@ public class InfoListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolde
 
     public InfoListAdapter(Activity a, View rootView) {
         infoItemBuilder = new InfoItemBuilder(a, rootView);
-        infoItemList = new Vector<>();
+        infoItemList = new ArrayList<>();
     }
 
     public void setOnStreamInfoItemSelectedListener
@@ -77,7 +77,7 @@ public class InfoListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolde
         }
     }
 
-    public void clearSteamItemList() {
+    public void clearStreamItemList() {
         infoItemList.clear();
         notifyDataSetChanged();
     }
@@ -92,12 +92,16 @@ public class InfoListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolde
         notifyDataSetChanged();
     }
 
+    public List<InfoItem> getItemsList() {
+        return infoItemList;
+    }
+
     @Override
     public int getItemCount() {
-        int cound = infoItemList.size();
-        if(header != null) cound++;
-        if(footer != null && showFooter) cound++;
-        return cound;
+        int count = infoItemList.size();
+        if(header != null) count++;
+        if(footer != null && showFooter) count++;
+        return count;
     }
 
     // don't ask why we have to do that this way... it's android accept it -.-

app/src/main/java/org/schabi/newpipe/info_list/StreamInfoItemHolder.java

@@ -1,9 +1,6 @@
 package org.schabi.newpipe.info_list;
 
-import android.icu.text.IDNA;
-import android.support.v7.widget.RecyclerView;
 import android.view.View;
-import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.TextView;
 
@@ -12,20 +9,20 @@ import org.schabi.newpipe.extractor.InfoItem;
 
 /**
  * Created by Christian Schabesberger on 01.08.16.
- *
+ * <p>
  * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
  * StreamInfoItemHolder.java is part of NewPipe.
- *
+ * <p>
  * NewPipe is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
- *
+ * <p>
  * NewPipe is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
+ * <p>
  * You should have received a copy of the GNU General Public License
  * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
  */
@@ -38,17 +35,17 @@ public class StreamInfoItemHolder extends InfoItemHolder {
             itemDurationView,
             itemUploadDateView,
             itemViewCountView;
-    public final Button itemButton;
+    public final View itemRoot;
 
     public StreamInfoItemHolder(View v) {
         super(v);
+        itemRoot = v.findViewById(R.id.itemRoot);
         itemThumbnailView = (ImageView) v.findViewById(R.id.itemThumbnailView);
         itemVideoTitleView = (TextView) v.findViewById(R.id.itemVideoTitleView);
         itemUploaderView = (TextView) v.findViewById(R.id.itemUploaderView);
         itemDurationView = (TextView) v.findViewById(R.id.itemDurationView);
         itemUploadDateView = (TextView) v.findViewById(R.id.itemUploadDateView);
         itemViewCountView = (TextView) v.findViewById(R.id.itemViewCountView);
-        itemButton = (Button) v.findViewById(R.id.item_button);
     }
 
     @Override

app/src/main/java/org/schabi/newpipe/player/BackgroundPlayer.java

@@ -78,7 +78,7 @@ public class BackgroundPlayer extends Service {
         powerManager = ((PowerManager) getSystemService(POWER_SERVICE));
         wifiManager = ((WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE));
 
-        ThemeHelper.setTheme(this, false);
+        ThemeHelper.setTheme(this);
         basePlayerImpl = new BasePlayerImpl(this);
         basePlayerImpl.setup();
     }

app/src/main/java/org/schabi/newpipe/player/MainVideoPlayer.java

@@ -55,7 +55,7 @@ public class MainVideoPlayer extends Activity {
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         if (DEBUG) Log.d(TAG, "onCreate() called with: savedInstanceState = [" + savedInstanceState + "]");
-        ThemeHelper.setTheme(this, false);
+        ThemeHelper.setTheme(this);
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) getWindow().setStatusBarColor(Color.BLACK);
         setVolumeControlStream(AudioManager.STREAM_MUSIC);
         audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
@@ -67,7 +67,7 @@ public class MainVideoPlayer extends Activity {
         }
 
         showSystemUi();
-        setContentView(R.layout.activity_exo_player);
+        setContentView(R.layout.activity_main_player);
         playerImpl = new VideoPlayerImpl();
         playerImpl.setup(findViewById(android.R.id.content));
         playerImpl.handleIntent(getIntent());
@@ -474,7 +474,7 @@ public class MainVideoPlayer extends Activity {
         @Override
         public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
             //noinspection PointlessBooleanExpression
-            if (DEBUG && true) Log.d(TAG, "MainVideoPlayer.onScroll = " +
+            if (DEBUG && false) Log.d(TAG, "MainVideoPlayer.onScroll = " +
                     ", e1.getRaw = [" + e1.getRawX() + ", " + e1.getRawY() + "]" +
                     ", e2.getRaw = [" + e2.getRawX() + ", " + e2.getRawY() + "]" +
                     ", distanceXy = [" + distanceX + ", " + distanceY + "]");
@@ -531,12 +531,14 @@ public class MainVideoPlayer extends Activity {
             if (playerImpl.getBrightnessTextView().getVisibility() == View.VISIBLE) playerImpl.animateView(playerImpl.getBrightnessTextView(), false, 200, 200);
 
             if (playerImpl.isControlsVisible() && playerImpl.getCurrentState() == BasePlayer.STATE_PLAYING) {
-                playerImpl.animateView(playerImpl.getControlsRoot(), false, 300, VideoPlayer.DEFAULT_CONTROLS_HIDE_TIME);
+                playerImpl.animateView(playerImpl.getControlsRoot(), false, 300, VideoPlayer.DEFAULT_CONTROLS_HIDE_TIME, true);
             }
         }
 
         @Override
         public boolean onTouch(View v, MotionEvent event) {
+            //noinspection PointlessBooleanExpression
+            if (DEBUG && false) Log.d(TAG, "onTouch() called with: v = [" + v + "], event = [" + event + "]");
             gestureDetector.onTouchEvent(event);
             if (event.getAction() == MotionEvent.ACTION_UP && isMoving) {
                 isMoving = false;

app/src/main/java/org/schabi/newpipe/player/PopupVideoPlayer.java

@@ -89,7 +89,7 @@ public class PopupVideoPlayer extends Service {
         notificationManager = ((NotificationManager) getSystemService(NOTIFICATION_SERVICE));
 
         playerImpl = new VideoPlayerImpl();
-        ThemeHelper.setTheme(this, false);
+        ThemeHelper.setTheme(this);
     }
 
     @Override
@@ -124,7 +124,6 @@ public class PopupVideoPlayer extends Service {
             playerImpl.destroy();
             if (playerImpl.getRootView() != null) windowManager.removeView(playerImpl.getRootView());
         }
-        if (imageLoader != null) imageLoader.clearMemoryCache();
         if (notificationManager != null) notificationManager.cancel(NOTIFICATION_ID);
         if (currentExtractorWorker != null) {
             currentExtractorWorker.cancel();

app/src/main/java/org/schabi/newpipe/player/VideoPlayer.java

@@ -125,7 +125,7 @@ public abstract class VideoPlayer extends BasePlayer implements SimpleExoPlayer.
         this.aspectRatioFrameLayout = (AspectRatioFrameLayout) rootView.findViewById(R.id.aspectRatioLayout);
         this.surfaceView = (SurfaceView) rootView.findViewById(R.id.surfaceView);
         this.surfaceForeground = rootView.findViewById(R.id.surfaceForeground);
-        this.loadingPanel = rootView.findViewById(R.id.loadingPanel);
+        this.loadingPanel = rootView.findViewById(R.id.loading_panel);
         this.endScreen = (ImageView) rootView.findViewById(R.id.endScreen);
         this.controlAnimationView = (ImageView) rootView.findViewById(R.id.controlAnimationView);
         this.controlsRoot = rootView.findViewById(R.id.playbackControlRoot);

app/src/main/java/org/schabi/newpipe/report/ErrorActivity.java

@@ -15,6 +15,7 @@ import android.support.design.widget.Snackbar;
 import android.support.v4.app.NavUtils;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -205,19 +206,19 @@ public class ErrorActivity extends AppCompatActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        ThemeHelper.setTheme(this, true);
+        ThemeHelper.setTheme(this);
         setContentView(R.layout.activity_error);
 
         Intent intent = getIntent();
 
-        try {
-            ActionBar actionBar = getSupportActionBar();
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+
+        ActionBar actionBar = getSupportActionBar();
+        if (actionBar != null) {
             actionBar.setDisplayHomeAsUpEnabled(true);
             actionBar.setTitle(R.string.error_report_title);
             actionBar.setDisplayShowTitleEnabled(true);
-        } catch (Throwable e) {
-            Log.e(TAG, "Error turing exception handling");
-            e.printStackTrace();
         }
 
         reportButton = (Button) findViewById(R.id.errorReportButton);

app/src/main/java/org/schabi/newpipe/settings/SettingsActivity.java

@@ -1,18 +1,11 @@
 package org.schabi.newpipe.settings;
 
 import android.content.Context;
-import android.content.Intent;
-import android.content.res.Configuration;
 import android.os.Bundle;
-import android.preference.PreferenceActivity;
-import android.support.annotation.LayoutRes;
-import android.support.annotation.NonNull;
 import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatDelegate;
-import android.view.MenuInflater;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
 import android.view.MenuItem;
-import android.view.View;
-import android.view.ViewGroup;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.util.ThemeHelper;
@@ -38,9 +31,7 @@ import org.schabi.newpipe.util.ThemeHelper;
  * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-public class SettingsActivity extends PreferenceActivity  {
-    SettingsFragment f = new SettingsFragment();
-    private AppCompatDelegate mDelegate = null;
+public class SettingsActivity extends AppCompatActivity {
 
     public static void initSettings(Context context) {
         NewPipeSettings.initSettings(context);
@@ -48,104 +39,25 @@ public class SettingsActivity extends PreferenceActivity  {
 
     @Override
     protected void onCreate(Bundle savedInstanceBundle) {
-        ThemeHelper.setTheme(this, true);
-        getDelegate().installViewFactory();
-        getDelegate().onCreate(savedInstanceBundle);
+        ThemeHelper.setTheme(this);
         super.onCreate(savedInstanceBundle);
+        setContentView(R.layout.settings_layout);
+
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
 
         ActionBar actionBar = getSupportActionBar();
-        actionBar.setDisplayHomeAsUpEnabled(true);
-        actionBar.setTitle(R.string.settings_title);
-        actionBar.setDisplayShowTitleEnabled(true);
+        if (actionBar != null) {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+            actionBar.setTitle(R.string.settings_title);
+            actionBar.setDisplayShowTitleEnabled(true);
+        }
 
         getFragmentManager().beginTransaction()
-                .replace(android.R.id.content, f)
+                .replace(R.id.fragment_holder,  new SettingsFragment())
                 .commit();
     }
 
-    @Override
-    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
-        super.onActivityResult(requestCode, resultCode, data);
-        f.onActivityResult(requestCode, resultCode, data);
-    }
-
-    @Override
-    protected void onPostCreate(Bundle savedInstanceState) {
-        super.onPostCreate(savedInstanceState);
-        getDelegate().onPostCreate(savedInstanceState);
-    }
-
-    private ActionBar getSupportActionBar() {
-        return getDelegate().getSupportActionBar();
-    }
-
-    @NonNull
-    @Override
-    public MenuInflater getMenuInflater() {
-        return getDelegate().getMenuInflater();
-    }
-
-    @Override
-    public void setContentView(@LayoutRes int layoutResID) {
-        getDelegate().setContentView(layoutResID);
-    }
-
-    @Override
-    public void setContentView(View view) {
-        getDelegate().setContentView(view);
-    }
-
-    @Override
-    public void setContentView(View view, ViewGroup.LayoutParams params) {
-        getDelegate().setContentView(view, params);
-    }
-
-    @Override
-    public void addContentView(View view, ViewGroup.LayoutParams params) {
-        getDelegate().addContentView(view, params);
-    }
-
-    @Override
-    protected void onPostResume() {
-        super.onPostResume();
-        getDelegate().onPostResume();
-    }
-
-    @Override
-    protected void onTitleChanged(CharSequence title, int color) {
-        super.onTitleChanged(title, color);
-        getDelegate().setTitle(title);
-    }
-
-    @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        super.onConfigurationChanged(newConfig);
-        getDelegate().onConfigurationChanged(newConfig);
-    }
-
-    @Override
-    protected void onStop() {
-        super.onStop();
-        getDelegate().onStop();
-    }
-
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-        getDelegate().onDestroy();
-    }
-
-    public void invalidateOptionsMenu() {
-        getDelegate().invalidateOptionsMenu();
-    }
-
-    private AppCompatDelegate getDelegate() {
-        if (mDelegate == null) {
-            mDelegate = AppCompatDelegate.create(this, null);
-        }
-        return mDelegate;
-    }
-
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         int id = item.getItemId();

app/src/main/java/org/schabi/newpipe/settings/SettingsFragment.java

@@ -1,205 +1,84 @@
 package org.schabi.newpipe.settings;
 
 import android.app.Activity;
-import android.content.ClipData;
-import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.net.Uri;
-import android.os.Build;
 import android.os.Bundle;
-import android.preference.ListPreference;
 import android.preference.Preference;
 import android.preference.PreferenceFragment;
 import android.preference.PreferenceManager;
 import android.preference.PreferenceScreen;
-import android.support.v7.app.AlertDialog;
+import android.text.TextUtils;
+import android.util.Log;
 
 import com.nononsenseapps.filepicker.FilePickerActivity;
 
 import org.schabi.newpipe.App;
 import org.schabi.newpipe.MainActivity;
 import org.schabi.newpipe.R;
-
-import java.util.ArrayList;
+import org.schabi.newpipe.util.Constants;
 
 import info.guardianproject.netcipher.proxy.OrbotHelper;
 
-/**
- * Created by david on 15/06/16.
- *
- * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
- * SettingsFragment.java is part of NewPipe.
- *
- * NewPipe is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * NewPipe is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
- */
+public class SettingsFragment extends PreferenceFragment implements SharedPreferences.OnSharedPreferenceChangeListener {
+    private static final int REQUEST_INSTALL_ORBOT = 0x1234;
+    private static final int REQUEST_DOWNLOAD_PATH = 0x1235;
+    private static final int REQUEST_DOWNLOAD_AUDIO_PATH = 0x1236;
 
-public class SettingsFragment  extends PreferenceFragment
-        implements SharedPreferences.OnSharedPreferenceChangeListener
-{
-    public static final int REQUEST_INSTALL_ORBOT = 0x1234;
-    SharedPreferences.OnSharedPreferenceChangeListener prefListener;
-    // get keys
-    String DEFAULT_RESOLUTION_PREFERENCE;
-    String DEFAULT_POPUP_RESOLUTION_PREFERENCE;
-    String PREFERRED_VIDEO_FORMAT_PREFERENCE;
-    String DEFAULT_AUDIO_FORMAT_PREFERENCE;
-    String SEARCH_LANGUAGE_PREFERENCE;
-    String DOWNLOAD_PATH_PREFERENCE;
-    String DOWNLOAD_PATH_AUDIO_PREFERENCE;
-    String USE_TOR_KEY;
-    String THEME;
-    private ListPreference defaultResolutionPreference;
-    private ListPreference defaultPopupResolutionPreference;
-    private ListPreference preferredVideoFormatPreference;
-    private ListPreference defaultAudioFormatPreference;
-    private ListPreference searchLanguagePreference;
-    private Preference downloadPathPreference;
-    private Preference downloadPathAudioPreference;
-    private Preference themePreference;
+    private String DOWNLOAD_PATH_PREFERENCE;
+    private String DOWNLOAD_PATH_AUDIO_PREFERENCE;
+    private String USE_TOR_KEY;
+    private String THEME;
+
+    private String currentTheme;
     private SharedPreferences defaultPreferences;
 
+    private Activity activity;
+
     @Override
     public void onCreate(final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        activity = getActivity();
         addPreferencesFromResource(R.xml.settings);
 
-        final Activity activity = getActivity();
-
         defaultPreferences = PreferenceManager.getDefaultSharedPreferences(activity);
+        initKeys();
+        updatePreferencesSummary();
 
-        // get keys
-        DEFAULT_RESOLUTION_PREFERENCE = getString(R.string.default_resolution_key);
-        DEFAULT_POPUP_RESOLUTION_PREFERENCE = getString(R.string.default_popup_resolution_key);
-        PREFERRED_VIDEO_FORMAT_PREFERENCE = getString(R.string.preferred_video_format_key);
-        DEFAULT_AUDIO_FORMAT_PREFERENCE = getString(R.string.default_audio_format_key);
-        SEARCH_LANGUAGE_PREFERENCE = getString(R.string.search_language_key);
+        currentTheme = defaultPreferences.getString(THEME, getString(R.string.default_theme_value));
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        defaultPreferences.registerOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        defaultPreferences.unregisterOnSharedPreferenceChangeListener(this);
+    }
+
+    private void initKeys() {
         DOWNLOAD_PATH_PREFERENCE = getString(R.string.download_path_key);
         DOWNLOAD_PATH_AUDIO_PREFERENCE = getString(R.string.download_path_audio_key);
         THEME = getString(R.string.theme_key);
         USE_TOR_KEY = getString(R.string.use_tor_key);
-
-        // get pref objects
-        defaultResolutionPreference =
-                (ListPreference) findPreference(DEFAULT_RESOLUTION_PREFERENCE);
-        defaultPopupResolutionPreference =
-                (ListPreference) findPreference(DEFAULT_POPUP_RESOLUTION_PREFERENCE);
-        preferredVideoFormatPreference =
-                (ListPreference) findPreference(PREFERRED_VIDEO_FORMAT_PREFERENCE);
-        defaultAudioFormatPreference =
-                (ListPreference) findPreference(DEFAULT_AUDIO_FORMAT_PREFERENCE);
-        searchLanguagePreference =
-                (ListPreference) findPreference(SEARCH_LANGUAGE_PREFERENCE);
-        downloadPathPreference = findPreference(DOWNLOAD_PATH_PREFERENCE);
-        downloadPathAudioPreference = findPreference(DOWNLOAD_PATH_AUDIO_PREFERENCE);
-        themePreference = findPreference(THEME);
-
-        final String currentTheme = defaultPreferences.getString(THEME, "Light");
-
-        // TODO: Clean this, as the class is already implementing the class
-        // and those double equals...
-
-        prefListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
-            @Override
-            public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
-                                                  String key) {
-                Activity a = getActivity();
-                if(a == null)
-                {
-                    return;
-                }
-                if (key == USE_TOR_KEY)
-                {
-                    if (defaultPreferences.getBoolean(USE_TOR_KEY, false)) {
-                        if (OrbotHelper.isOrbotInstalled(a)) {
-                            App.configureTor(true);
-                            OrbotHelper.requestStartTor(a);
-                        } else {
-                            Intent intent = OrbotHelper.getOrbotInstallIntent(a);
-                            a.startActivityForResult(intent, REQUEST_INSTALL_ORBOT);
-                        }
-                    } else {
-                        App.configureTor(false);
-                    }
-                }
-                else if (key == DOWNLOAD_PATH_PREFERENCE)
-                {
-                    String downloadPath = sharedPreferences
-                            .getString(DOWNLOAD_PATH_PREFERENCE,
-                                    getString(R.string.download_path_summary));
-                    downloadPathPreference
-                            .setSummary(downloadPath);
-                }
-                else if (key == DOWNLOAD_PATH_AUDIO_PREFERENCE)
-                {
-                    String downloadPath = sharedPreferences
-                            .getString(DOWNLOAD_PATH_AUDIO_PREFERENCE,
-                                    getString(R.string.download_path_audio_summary));
-                    downloadPathAudioPreference
-                            .setSummary(downloadPath);
-                }
-                else if (key == THEME)
-                {
-                    String selectedTheme = sharedPreferences.getString(THEME, "Light");
-                    themePreference.setSummary(selectedTheme);
-
-                    if(!selectedTheme.equals(currentTheme)) { // If it's not the current theme
-                        new AlertDialog.Builder(activity)
-                                .setTitle(R.string.restart_title)
-                                .setMessage(R.string.msg_restart)
-                                .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {
-                                    @Override
-                                    public void onClick(DialogInterface dialog, int which) {
-                                        Intent intentToMain = new Intent(activity, MainActivity.class);
-                                        intentToMain.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
-                                        activity.startActivity(intentToMain);
-
-                                        activity.finish();
-                                        Runtime.getRuntime().exit(0);
-                                    }
-                                })
-                                .setNegativeButton(R.string.later, null)
-                                .create().show();
-                    }
-                }
-                updateSummary();
-            }
-        };
-        defaultPreferences.registerOnSharedPreferenceChangeListener(prefListener);
-
-        updateSummary();
     }
 
     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
-
-        if(preference.getKey().equals(downloadPathPreference.getKey()) ||
-                preference.getKey().equals(downloadPathAudioPreference.getKey()))
-        {
-            Activity activity = getActivity();
-            Intent i = new Intent(activity, FilePickerActivity.class);
-
-            i.putExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, false);
-            i.putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_DIR, true);
-            i.putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_DIR);
-            if(preference.getKey().equals(downloadPathPreference.getKey()))
-            {
-                activity.startActivityForResult(i, R.string.download_path_key);
-            }
-            else if (preference.getKey().equals(downloadPathAudioPreference.getKey()))
-            {
-                activity.startActivityForResult(i, R.string.download_path_audio_key);
+        Log.d("TAG", "onPreferenceTreeClick() called with: preferenceScreen = [" + preferenceScreen + "], preference = [" + preference + "]");
+        if (preference.getKey().equals(DOWNLOAD_PATH_PREFERENCE) || preference.getKey().equals(DOWNLOAD_PATH_AUDIO_PREFERENCE)) {
+            Intent i = new Intent(activity, FilePickerActivity.class)
+                    .putExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, false)
+                    .putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_DIR, true)
+                    .putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_DIR);
+            if (preference.getKey().equals(DOWNLOAD_PATH_PREFERENCE)) {
+                startActivityForResult(i, REQUEST_DOWNLOAD_PATH);
+            } else if (preference.getKey().equals(DOWNLOAD_PATH_AUDIO_PREFERENCE)) {
+                startActivityForResult(i, REQUEST_DOWNLOAD_AUDIO_PATH);
             }
         }
         return super.onPreferenceTreeClick(preferenceScreen, preference);
@@ -208,90 +87,56 @@ public class SettingsFragment  extends PreferenceFragment
     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         super.onActivityResult(requestCode, resultCode, data);
-        Activity a = getActivity();
+        Log.d("TAG", "onActivityResult() called with: requestCode = [" + requestCode + "], resultCode = [" + resultCode + "], data = [" + data + "]");
 
-        if ((requestCode == R.string.download_path_audio_key
-                || requestCode == R.string.download_path_key)
-                && resultCode == Activity.RESULT_OK) {
-
-            Uri uri = null;
-            if (data.getBooleanExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, false)) {
-                // For JellyBean and above
-                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
-                    ClipData clip = data.getClipData();
-
-                    if (clip != null) {
-                        for (int i = 0; i < clip.getItemCount(); i++) {
-                            uri = clip.getItemAt(i).getUri();
-                        }
-                    }
-                    // For Ice Cream Sandwich
-                } else {
-                    ArrayList<String> paths = data.getStringArrayListExtra
-                            (FilePickerActivity.EXTRA_PATHS);
-
-                    if (paths != null) {
-                        for (String path: paths) {
-                            uri = Uri.parse(path);
-                        }
-                    }
-                }
-            } else {
-                uri = data.getData();
-            }
-            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(a);
-
-            //requestCode is equal to  R.string.download_path_key or
-            //R.string.download_path_audio_key
-            String key = getString(requestCode);
+        if ((requestCode == REQUEST_DOWNLOAD_PATH || requestCode == REQUEST_DOWNLOAD_AUDIO_PATH) && resultCode == Activity.RESULT_OK) {
+            String key = getString(requestCode == REQUEST_DOWNLOAD_PATH ? R.string.download_path_key : R.string.download_path_audio_key);
             String path = data.getData().toString().substring(7);
-            prefs.edit()
-                    .putString(key, path)
-                    .apply();
-
-        }
-        else if(requestCode == REQUEST_INSTALL_ORBOT)
-        {
+            defaultPreferences.edit().putString(key, path).apply();
+            updatePreferencesSummary();
+        } else if (requestCode == REQUEST_INSTALL_ORBOT) {
             // try to start tor regardless of resultCode since clicking back after
             // installing the app does not necessarily return RESULT_OK
-            App.configureTor(requestCode == REQUEST_INSTALL_ORBOT
-                    && OrbotHelper.requestStartTor(a));
+            App.configureTor(OrbotHelper.requestStartTor(activity));
         }
-
-        updateSummary();
-        super.onActivityResult(requestCode, resultCode, data);
     }
 
-    // This is used to show the status of some preference in the description
-    private void updateSummary() {
-        defaultResolutionPreference.setSummary(
-                defaultPreferences.getString(DEFAULT_RESOLUTION_PREFERENCE,
-                        getString(R.string.default_resolution_value)));
-        defaultPopupResolutionPreference.setSummary(
-                defaultPreferences.getString(DEFAULT_POPUP_RESOLUTION_PREFERENCE,
-                        getString(R.string.default_popup_resolution_value)));
-        preferredVideoFormatPreference.setSummary(
-                defaultPreferences.getString(PREFERRED_VIDEO_FORMAT_PREFERENCE,
-                        getString(R.string.preferred_video_format_default)));
-        defaultAudioFormatPreference.setSummary(
-                defaultPreferences.getString(DEFAULT_AUDIO_FORMAT_PREFERENCE,
-                        getString(R.string.default_audio_format_value)));
-        searchLanguagePreference.setSummary(
-                defaultPreferences.getString(SEARCH_LANGUAGE_PREFERENCE,
-                        getString(R.string.default_language_value)));
-        downloadPathPreference.setSummary(
-                defaultPreferences.getString(DOWNLOAD_PATH_PREFERENCE,
-                        getString(R.string.download_path_summary)));
-        downloadPathAudioPreference.setSummary(
-                defaultPreferences.getString(DOWNLOAD_PATH_AUDIO_PREFERENCE,
-                        getString(R.string.download_path_audio_summary)));
-        themePreference.setSummary(
-                defaultPreferences.getString(THEME,
-                        getString(R.string.light_theme_title)));
+    /**
+     * Update ONLY the summary of some preferences that don't fire in the onSharedPreferenceChanged or CAN'T be update via xml (%s)
+     *
+     * For example, the download_path use the startActivityForResult, firing the onStop of this fragment,
+     * unregistering the listener (unregisterOnSharedPreferenceChangeListener)
+     */
+    private void updatePreferencesSummary() {
+        findPreference(DOWNLOAD_PATH_PREFERENCE).setSummary(defaultPreferences.getString(DOWNLOAD_PATH_PREFERENCE, getString(R.string.download_path_summary)));
+        findPreference(DOWNLOAD_PATH_AUDIO_PREFERENCE).setSummary(defaultPreferences.getString(DOWNLOAD_PATH_AUDIO_PREFERENCE, getString(R.string.download_path_audio_summary)));
     }
 
     @Override
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        Log.d("TAG", "onSharedPreferenceChanged() called with: sharedPreferences = [" + sharedPreferences + "], key = [" + key + "]");
+        String summary = null;
 
+        if (key.equals(USE_TOR_KEY)) {
+            if (defaultPreferences.getBoolean(USE_TOR_KEY, false)) {
+                if (OrbotHelper.isOrbotInstalled(activity)) {
+                    App.configureTor(true);
+                    OrbotHelper.requestStartTor(activity);
+                } else {
+                    Intent intent = OrbotHelper.getOrbotInstallIntent(activity);
+                    startActivityForResult(intent, REQUEST_INSTALL_ORBOT);
+                }
+            } else App.configureTor(false);
+            return;
+        } else if (key.equals(THEME)) {
+            summary = sharedPreferences.getString(THEME, getString(R.string.default_theme_value));
+            if (!summary.equals(currentTheme)) { // If it's not the current theme
+                Intent intentToMain = new Intent(activity, MainActivity.class);
+                intentToMain.putExtra(Constants.KEY_THEME_CHANGE, true);
+                startActivity(intentToMain);
+            }
+        }
+
+        if (!TextUtils.isEmpty(summary)) findPreference(key).setSummary(summary);
     }
 }

app/src/main/java/org/schabi/newpipe/util/Constants.java

@@ -5,4 +5,8 @@ public class Constants {
     public static final String KEY_URL = "key_url";
     public static final String KEY_TITLE = "key_title";
     public static final String KEY_LINK_TYPE = "key_link_type";
+    public static final String KEY_OPEN_SEARCH = "key_open_search";
+    public static final String KEY_QUERY = "key_query";
+
+    public static final String KEY_THEME_CHANGE = "key_theme_change";
 }

app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java

@@ -19,6 +19,10 @@ import org.schabi.newpipe.player.VideoPlayer;
 @SuppressWarnings({"unused", "WeakerAccess"})
 public class NavigationHelper {
 
+    /*//////////////////////////////////////////////////////////////////////////
+    // Players
+    //////////////////////////////////////////////////////////////////////////*/
+
     public static Intent getOpenVideoPlayerIntent(Context context, Class targetClazz, StreamInfo info, int selectedStreamIndex) {
         Intent mIntent = new Intent(context, targetClazz)
                 .putExtra(BasePlayer.VIDEO_TITLE, info.title)
@@ -61,7 +65,6 @@ public class NavigationHelper {
         return mIntent;
     }
 
-
     /*//////////////////////////////////////////////////////////////////////////
     // Through Interface (faster)
     //////////////////////////////////////////////////////////////////////////*/
@@ -115,6 +118,14 @@ public class NavigationHelper {
         context.startActivity(mIntent);
     }
 
+    public static void openSearch(Context context, int serviceId, String query) {
+        Intent mIntent = new Intent(context, MainActivity.class);
+        mIntent.putExtra(Constants.KEY_SERVICE_ID, serviceId);
+        mIntent.putExtra(Constants.KEY_QUERY, query);
+        mIntent.putExtra(Constants.KEY_OPEN_SEARCH, true);
+        context.startActivity(mIntent);
+    }
+
     private static Intent getOpenIntent(Context context, String url, int serviceId, StreamingService.LinkType type) {
         Intent mIntent = new Intent(context, MainActivity.class);
         mIntent.putExtra(Constants.KEY_SERVICE_ID, serviceId);

app/src/main/java/org/schabi/newpipe/util/ThemeHelper.java

@@ -10,25 +10,33 @@ public class ThemeHelper {
     /**
      * Apply the selected theme (on NewPipe settings) in the context
      *
-     * @param context               context that the theme will be applied
-     * @param useActionbarTheme     whether to use an action bar theme or not
+     * @param context context that the theme will be applied
      */
-    public static void setTheme(Context context, boolean useActionbarTheme) {
+    public static void setTheme(Context context) {
+
         String themeKey = context.getString(R.string.theme_key);
         String darkTheme = context.getResources().getString(R.string.dark_theme_title);
         String blackTheme = context.getResources().getString(R.string.black_theme_title);
 
-        String sp = PreferenceManager.getDefaultSharedPreferences(context)
-                .getString(themeKey, context.getResources().getString(R.string.light_theme_title));
+        String sp = PreferenceManager.getDefaultSharedPreferences(context).getString(themeKey, context.getResources().getString(R.string.light_theme_title));
 
-        if (useActionbarTheme) {
-            if (sp.equals(darkTheme)) context.setTheme(R.style.DarkTheme);
-            else if (sp.equals(blackTheme)) context.setTheme(R.style.BlackTheme);
-            else context.setTheme(R.style.AppTheme);
-        } else {
-            if (sp.equals(darkTheme)) context.setTheme(R.style.DarkTheme_NoActionBar);
-            else if (sp.equals(blackTheme)) context.setTheme(R.style.BlackTheme_NoActionBar);
-            else context.setTheme(R.style.AppTheme_NoActionBar);
-        }
+        if (sp.equals(darkTheme)) context.setTheme(R.style.DarkTheme);
+        else if (sp.equals(blackTheme)) context.setTheme(R.style.BlackTheme);
+        else context.setTheme(R.style.AppTheme);
+    }
+
+    /**
+     * Return true if the selected theme (on NewPipe settings) is the Light theme
+     *
+     * @param context context to get the preference
+     */
+    public static boolean isLightThemeSelected(Context context) {
+        String themeKey = context.getString(R.string.theme_key);
+        String darkTheme = context.getResources().getString(R.string.dark_theme_title);
+        String blackTheme = context.getResources().getString(R.string.black_theme_title);
+
+        String sp = PreferenceManager.getDefaultSharedPreferences(context).getString(themeKey, context.getResources().getString(R.string.light_theme_title));
+
+        return !(sp.equals(darkTheme) || sp.equals(blackTheme));
     }
 }

app/src/main/java/org/schabi/newpipe/workers/AbstractWorker.java

@@ -0,0 +1,118 @@
+package org.schabi.newpipe.workers;
+
+import android.content.Context;
+import android.os.Handler;
+
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.stream_info.StreamInfo;
+
+import java.io.InterruptedIOException;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Common properties of Workers
+ *
+ * @author mauriciocolli
+ */
+@SuppressWarnings("WeakerAccess")
+public abstract class AbstractWorker extends Thread {
+
+    private final AtomicBoolean isRunning = new AtomicBoolean(false);
+
+    private final int serviceId;
+    private Context context;
+    private Handler handler;
+    private StreamingService service;
+
+    public AbstractWorker(Context context, int serviceId) {
+        this.context = context;
+        this.serviceId = serviceId;
+        this.handler = new Handler(context.getMainLooper());
+    }
+
+    @Override
+    public void run() {
+        try {
+            isRunning.set(true);
+            service = NewPipe.getService(serviceId);
+            doWork(serviceId);
+        } catch (Exception e) {
+            // Handle the exception only if thread is not interrupted
+            e.printStackTrace();
+            if (!isInterrupted() && !(e instanceof InterruptedIOException) && !(e.getCause() instanceof InterruptedIOException)) {
+                handleException(e, serviceId);
+            }
+        } finally {
+            isRunning.set(false);
+        }
+    }
+
+    /**
+     * Here is the place that the heavy work is realized
+     *
+     * @param serviceId     serviceId that was passed when created this object
+     *
+     * @throws Exception    these exceptions are handled by the {@link #handleException(Exception, int)}
+     */
+    protected abstract void doWork(int serviceId) throws Exception;
+
+
+    /**
+     * Method that handle the exception thrown by the {@link #doWork(int)}.
+     *
+     * @param exception {@link Exception} that was thrown by {@link #doWork(int)}
+     */
+    protected abstract void handleException(Exception exception, int serviceId);
+
+    /**
+     * Return true if the extraction is not completed yet
+     *
+     * @return the value of the AtomicBoolean {@link #isRunning}
+     */
+    public boolean isRunning() {
+        return isRunning.get();
+    }
+
+    /**
+     * Cancel this ExtractorWorker, calling {@link #onDestroy()} and interrupting this thread.
+     * <p>
+     * <b>Note:</b> Any I/O that is active in the moment that this method is called will be canceled and a Exception will be thrown, because of the {@link #interrupt()}.<br>
+     * This is useful when you don't want the resulting {@link StreamInfo} anymore, but don't want to waste bandwidth, otherwise it'd run till it receives the StreamInfo.
+     */
+    public void cancel() {
+        onDestroy();
+        this.interrupt();
+    }
+
+    /**
+     * Method that discards everything that doesn't need anymore.<br>
+     * Subclasses can override this method to destroy their garbage.
+     */
+    protected void onDestroy() {
+        this.isRunning.set(false);
+        this.context = null;
+        this.handler = null;
+        this.service = null;
+    }
+
+    public Handler getHandler() {
+        return handler;
+    }
+
+    public StreamingService getService() {
+        return service;
+    }
+
+    public int getServiceId() {
+        return serviceId;
+    }
+
+    public String getServiceName() {
+        return service == null ? "none" : service.getServiceInfo().name;
+    }
+
+    public Context getContext() {
+        return context;
+    }
+}

app/src/main/java/org/schabi/newpipe/workers/ChannelExtractorWorker.java

@@ -31,7 +31,7 @@ public class ChannelExtractorWorker extends ExtractorWorker {
      * Interface which will be called for result and errors
      */
     public interface OnChannelInfoReceive {
-        void onReceive(ChannelInfo info);
+        void onReceive(ChannelInfo info, boolean onlyVideos);
         void onError(int messageId);
         /**
          * Called when an unrecoverable error has occurred.
@@ -44,12 +44,15 @@ public class ChannelExtractorWorker extends ExtractorWorker {
      * @param context           context for error reporting purposes
      * @param serviceId         id of the request service
      * @param channelUrl        channelUrl of the service (e.g. https://www.youtube.com/channel/UC_aEa8K-EOJ3D6gOs7HcyNg)
+     * @param pageNumber        which page to extract
+     * @param onlyVideos        flag that will be send by {@link OnChannelInfoReceive#onReceive(ChannelInfo, boolean)}
      * @param callback          listener that will be called-back when events occur (check {@link ChannelExtractorWorker.OnChannelInfoReceive})
      */
-    public ChannelExtractorWorker(Context context, int serviceId, String channelUrl, int pageNumber, OnChannelInfoReceive callback) {
+    public ChannelExtractorWorker(Context context, int serviceId, String channelUrl, int pageNumber, boolean onlyVideos, OnChannelInfoReceive callback) {
         super(context, channelUrl, serviceId);
         this.pageNumber = pageNumber;
         this.callback = callback;
+        this.onlyVideos = onlyVideos;
     }
 
     @Override
@@ -71,7 +74,7 @@ public class ChannelExtractorWorker extends ExtractorWorker {
             public void run() {
                 if (isInterrupted() || callback == null) return;
 
-                callback.onReceive(channelInfo);
+                callback.onReceive(channelInfo, onlyVideos);
                 onDestroy();
             }
         });
@@ -107,13 +110,5 @@ public class ChannelExtractorWorker extends ExtractorWorker {
             });
         }
     }
-
-    public boolean isOnlyVideos() {
-        return onlyVideos;
-    }
-
-    public void setOnlyVideos(boolean onlyVideos) {
-        this.onlyVideos = onlyVideos;
-    }
 }
 

app/src/main/java/org/schabi/newpipe/workers/ExtractorWorker.java

@@ -2,18 +2,12 @@ package org.schabi.newpipe.workers;
 
 import android.app.Activity;
 import android.content.Context;
-import android.os.Handler;
 import android.util.Log;
 import android.view.View;
 
-import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.StreamingService;
-import org.schabi.newpipe.extractor.stream_info.StreamInfo;
 import org.schabi.newpipe.report.ErrorActivity;
 
-import java.io.InterruptedIOException;
 import java.util.List;
-import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
  * Common properties of ExtractorWorkers
@@ -21,38 +15,18 @@ import java.util.concurrent.atomic.AtomicBoolean;
  * @author mauriciocolli
  */
 @SuppressWarnings("WeakerAccess")
-public abstract class ExtractorWorker extends Thread {
-
-    private final AtomicBoolean isRunning = new AtomicBoolean(false);
-
+public abstract class ExtractorWorker extends AbstractWorker {
     private final String url;
-    private final int serviceId;
-    private Context context;
-    private Handler handler;
-    private StreamingService service;
 
     public ExtractorWorker(Context context, String url, int serviceId) {
-        this.context = context;
+        super(context, serviceId);
         this.url = url;
-        this.serviceId = serviceId;
-        this.handler = new Handler(context.getMainLooper());
         if (url.length() >= 40) setName("Thread-" + url.substring(url.length() - 11, url.length()));
     }
 
     @Override
-    public void run() {
-        try {
-            isRunning.set(true);
-            service = NewPipe.getService(serviceId);
-            doWork(serviceId, url);
-        } catch (Exception e) {
-            // Handle the exception only if thread is not interrupted
-            if (!isInterrupted() && !(e instanceof InterruptedIOException) && !(e.getCause() instanceof InterruptedIOException)) {
-                handleException(e, serviceId, url);
-            }
-        } finally {
-            isRunning.set(false);
-        }
+    protected void doWork(int serviceId) throws Exception {
+        doWork(serviceId, url);
     }
 
     /**
@@ -65,6 +39,10 @@ public abstract class ExtractorWorker extends Thread {
      */
     protected abstract void doWork(int serviceId, String url) throws Exception;
 
+    @Override
+    protected void handleException(Exception exception, int serviceId) {
+        handleException(exception, serviceId, url);
+    }
 
     /**
      * Method that handle the exception thrown by the {@link #doWork(int, String)}.
@@ -99,63 +77,12 @@ public abstract class ExtractorWorker extends Thread {
         }
 
         if (getContext() instanceof Activity) {
-            View rootView = getContext() != null ? ((Activity) getContext()).findViewById(android.R.id.content) : null;
+            View rootView = getContext() instanceof Activity ? ((Activity) getContext()).findViewById(android.R.id.content) : null;
             ErrorActivity.reportError(getHandler(), getContext(), errorsList, null, rootView, ErrorActivity.ErrorInfo.make(errorUserAction, getServiceName(), url, 0 /* no message for the user */));
         }
     }
 
-    /**
-     * Return true if the extraction is not completed yet
-     *
-     * @return the value of the AtomicBoolean {@link #isRunning}
-     */
-    public boolean isRunning() {
-        return isRunning.get();
-    }
-
-    /**
-     * Cancel this ExtractorWorker, calling {@link #onDestroy()} and interrupting this thread.
-     * <p>
-     * <b>Note:</b> Any I/O that is active in the moment that this method is called will be canceled and a Exception will be thrown, because of the {@link #interrupt()}.<br>
-     * This is useful when you don't want the resulting {@link StreamInfo} anymore, but don't want to waste bandwidth, otherwise it'd run till it receives the StreamInfo.
-     */
-    public void cancel() {
-        onDestroy();
-        this.interrupt();
-    }
-
-    /**
-     * Method that discards everything that doesn't need anymore.<br>
-     * Subclasses can override this method to destroy their garbage.
-     */
-    protected void onDestroy() {
-        this.isRunning.set(false);
-        this.context = null;
-        this.handler = null;
-        this.service = null;
-    }
-
-    public Handler getHandler() {
-        return handler;
-    }
-
     public String getUrl() {
         return url;
     }
-
-    public StreamingService getService() {
-        return service;
-    }
-
-    public int getServiceId() {
-        return serviceId;
-    }
-
-    public String getServiceName() {
-        return service == null ? "none" : service.getServiceInfo().name;
-    }
-
-    public Context getContext() {
-        return context;
-    }
 }

app/src/main/java/org/schabi/newpipe/workers/SearchWorker.java

@@ -0,0 +1,127 @@
+package org.schabi.newpipe.workers;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+import android.support.annotation.NonNull;
+import android.view.View;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
+import org.schabi.newpipe.extractor.search.SearchEngine;
+import org.schabi.newpipe.extractor.search.SearchResult;
+import org.schabi.newpipe.report.ErrorActivity;
+
+import java.io.IOException;
+import java.util.EnumSet;
+
+/**
+ * Return list of results based on a query
+ *
+ * @author mauriciocolli
+ */
+public class SearchWorker extends AbstractWorker {
+
+    private EnumSet<SearchEngine.Filter> filter;
+    private String query;
+    private int page;
+    private OnSearchResult callback;
+
+    /**
+     * Interface which will be called for result and errors
+     */
+    public interface OnSearchResult {
+        void onSearchResult(SearchResult result);
+        void onNothingFound(String message);
+        void onSearchError(int messageId);
+        void onReCaptchaChallenge();
+    }
+
+    public SearchWorker(Context context, int serviceId, String query, int page, EnumSet<SearchEngine.Filter> filter, OnSearchResult callback) {
+        super(context, serviceId);
+        this.callback = callback;
+        this.query = query;
+        this.page = page;
+        this.filter = filter;
+    }
+
+    public static SearchWorker startForQuery(Context context, int serviceId, @NonNull String query, int page, EnumSet<SearchEngine.Filter> filter, OnSearchResult callback) {
+        SearchWorker worker = new SearchWorker(context, serviceId, query, page, filter, callback);
+        worker.start();
+        return worker;
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        this.callback = null;
+    }
+
+    @Override
+    protected void doWork(int serviceId) throws Exception {
+        SearchEngine searchEngine = getService().getSearchEngineInstance();
+
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getContext());
+        String searchLanguageKey = getContext().getString(R.string.search_language_key);
+        String searchLanguage = sharedPreferences.getString(searchLanguageKey, getContext().getString(R.string.default_language_value));
+
+        final SearchResult searchResult = SearchResult.getSearchResult(searchEngine, query, page, searchLanguage, filter);
+        if (callback != null && searchResult != null && !isInterrupted()) getHandler().post(new Runnable() {
+            @Override
+            public void run() {
+                if (isInterrupted() || callback == null) return;
+
+                callback.onSearchResult(searchResult);
+                onDestroy();
+            }
+        });
+    }
+
+    @Override
+    protected void handleException(final Exception exception, int serviceId) {
+        if (callback == null || getHandler() == null || isInterrupted()) return;
+
+        if (exception instanceof ReCaptchaException) {
+            getHandler().post(new Runnable() {
+                @Override
+                public void run() {
+                    callback.onReCaptchaChallenge();
+                }
+            });
+        } else if (exception instanceof IOException) {
+            getHandler().post(new Runnable() {
+                @Override
+                public void run() {
+                    callback.onSearchError(R.string.network_error);
+                }
+            });
+        } else if (exception instanceof SearchEngine.NothingFoundException) {
+            getHandler().post(new Runnable() {
+                @Override
+                public void run() {
+                    callback.onNothingFound(exception.getMessage());
+                }
+            });
+        } else if (exception instanceof ExtractionException) {
+            View rootView = getContext() instanceof Activity ? ((Activity) getContext()).findViewById(android.R.id.content) : null;
+            ErrorActivity.reportError(getHandler(), getContext(), exception, null, rootView, ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED, getServiceName(), query, R.string.parsing_error));
+            getHandler().post(new Runnable() {
+                @Override
+                public void run() {
+                    callback.onSearchError(R.string.parsing_error);
+                }
+            });
+        } else {
+            View rootView = getContext() instanceof Activity ? ((Activity) getContext()).findViewById(android.R.id.content) : null;
+            ErrorActivity.reportError(getHandler(), getContext(), exception, null, rootView, ErrorActivity.ErrorInfo.make(ErrorActivity.SEARCHED, getServiceName(), query, R.string.general_error));
+            getHandler().post(new Runnable() {
+                @Override
+                public void run() {
+                    callback.onSearchError(R.string.general_error);
+                }
+            });
+        }
+    }
+}

app/src/main/java/org/schabi/newpipe/workers/SuggestionWorker.java

@@ -0,0 +1,108 @@
+package org.schabi.newpipe.workers;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+import android.support.annotation.NonNull;
+import android.view.View;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.extractor.SuggestionExtractor;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.report.ErrorActivity;
+
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * Worker that get suggestions based on the query
+ *
+ * @author mauriciocolli
+ */
+public class SuggestionWorker extends AbstractWorker {
+
+    private String query;
+    private OnSuggestionResult callback;
+
+    /**
+     * Interface which will be called for result and errors
+     */
+    public interface OnSuggestionResult {
+        void onSuggestionResult(@NonNull List<String> suggestions);
+        void onSuggestionError(int messageId);
+    }
+
+    public SuggestionWorker(Context context, int serviceId, String query, OnSuggestionResult callback) {
+        super(context, serviceId);
+        this.callback = callback;
+        this.query = query;
+    }
+
+    public static SuggestionWorker startForQuery(Context context, int serviceId, @NonNull String query, OnSuggestionResult callback) {
+        SuggestionWorker worker = new SuggestionWorker(context, serviceId, query, callback);
+        worker.start();
+        return worker;
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        this.callback = null;
+        this.query = null;
+    }
+
+    @Override
+    protected void doWork(int serviceId) throws Exception {
+        SuggestionExtractor suggestionExtractor = getService().getSuggestionExtractorInstance();
+
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getContext());
+        String searchLanguageKey = getContext().getString(R.string.search_language_key);
+        String searchLanguage = sharedPreferences.getString(searchLanguageKey, getContext().getString(R.string.default_language_value));
+
+        final List<String> suggestions = suggestionExtractor.suggestionList(query, searchLanguage);
+
+        if (callback != null && suggestions != null && !isInterrupted()) getHandler().post(new Runnable() {
+            @Override
+            public void run() {
+                if (isInterrupted() || callback == null) return;
+
+                callback.onSuggestionResult(suggestions);
+                onDestroy();
+            }
+        });
+    }
+
+    @Override
+    protected void handleException(final Exception exception, int serviceId) {
+        if (callback == null || getHandler() == null || isInterrupted()) return;
+
+        if (exception instanceof ExtractionException) {
+            View rootView = getContext() instanceof Activity ? ((Activity) getContext()).findViewById(android.R.id.content) : null;
+            ErrorActivity.reportError(getHandler(), getContext(), exception, null, rootView, ErrorActivity.ErrorInfo.make(ErrorActivity.GET_SUGGESTIONS, getServiceName(), query, R.string.parsing_error));
+            getHandler().post(new Runnable() {
+                @Override
+                public void run() {
+                    callback.onSuggestionError(R.string.parsing_error);
+                }
+            });
+        } else if (exception instanceof IOException) {
+            getHandler().post(new Runnable() {
+                @Override
+                public void run() {
+                    callback.onSuggestionError(R.string.network_error);
+                }
+            });
+        } else {
+            View rootView = getContext() instanceof Activity ? ((Activity) getContext()).findViewById(android.R.id.content) : null;
+            ErrorActivity.reportError(getHandler(), getContext(), exception, null, rootView, ErrorActivity.ErrorInfo.make(ErrorActivity.GET_SUGGESTIONS, getServiceName(), query, R.string.general_error));
+            getHandler().post(new Runnable() {
+                @Override
+                public void run() {
+                    callback.onSuggestionError(R.string.general_error);
+                }
+            });
+        }
+
+    }
+}