do not show hidden items by default

app/src/main/AndroidManifest.xml

@@ -24,5 +24,9 @@
         <activity
             android:name=".activities.LicenseActivity"
             android:label="@string/third_party_licences"/>
+
+        <activity
+            android:name=".activities.SettingsActivity"
+            android:label="@string/settings"/>
     </application>
 </manifest>

app/src/main/java/com/simplemobiletools/filemanager/Config.java

@@ -21,4 +21,12 @@ public class Config {
     public void setIsFirstRun(boolean firstRun) {
         mPrefs.edit().putBoolean(Constants.IS_FIRST_RUN, firstRun).apply();
     }
+
+    public boolean getShowHidden() {
+        return mPrefs.getBoolean(Constants.SHOW_HIDDEN, false);
+    }
+
+    public void setShowHidden(boolean show) {
+        mPrefs.edit().putBoolean(Constants.SHOW_HIDDEN, show).apply();
+    }
 }

app/src/main/java/com/simplemobiletools/filemanager/Constants.java

@@ -6,4 +6,5 @@ public class Constants {
     // shared preferences
     public static final String PREFS_KEY = "File Manager";
     public static final String IS_FIRST_RUN = "is_first_run";
+    public static final String SHOW_HIDDEN = "show_hidden";
 }

app/src/main/java/com/simplemobiletools/filemanager/activities/AboutActivity.java

@@ -42,6 +42,24 @@ public class AboutActivity extends AppCompatActivity {
         setupRateUs();
     }
 
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.menu_about, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.settings:
+                final Intent intent = new Intent(getApplicationContext(), SettingsActivity.class);
+                startActivity(intent);
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
     private void setupEmail() {
         final String email = mRes.getString(R.string.email);
         final String appName = mRes.getString(R.string.app_name);

app/src/main/java/com/simplemobiletools/filemanager/activities/SettingsActivity.java

@@ -0,0 +1,38 @@
+package com.simplemobiletools.filemanager.activities;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.SwitchCompat;
+
+import com.simplemobiletools.filemanager.Config;
+import com.simplemobiletools.filemanager.R;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import butterknife.OnClick;
+
+public class SettingsActivity extends AppCompatActivity {
+    @BindView(R.id.settings_show_hidden) SwitchCompat mShowHiddenSwitch;
+
+    private static Config mConfig;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_settings);
+        mConfig = Config.newInstance(getApplicationContext());
+        ButterKnife.bind(this);
+
+        setupShowHidden();
+    }
+
+    private void setupShowHidden() {
+        mShowHiddenSwitch.setChecked(mConfig.getShowHidden());
+    }
+
+    @OnClick(R.id.settings_show_hidden_holder)
+    public void handleShowHidden() {
+        mShowHiddenSwitch.setChecked(!mShowHiddenSwitch.isChecked());
+        mConfig.setShowHidden(mShowHiddenSwitch.isChecked());
+    }
+}

app/src/main/java/com/simplemobiletools/filemanager/fragments/ItemsFragment.java

@@ -12,6 +12,7 @@ import android.webkit.MimeTypeMap;
 import android.widget.AdapterView;
 import android.widget.ListView;
 
+import com.simplemobiletools.filemanager.Config;
 import com.simplemobiletools.filemanager.Constants;
 import com.simplemobiletools.filemanager.R;
 import com.simplemobiletools.filemanager.Utils;
@@ -31,6 +32,7 @@ public class ItemsFragment extends android.support.v4.app.Fragment implements Ad
 
     private List<FileDirItem> mItems;
     private ItemInteractionListener mListener;
+    private boolean mShowHidden;
 
     @Nullable
     @Override
@@ -43,7 +45,20 @@ public class ItemsFragment extends android.support.v4.app.Fragment implements Ad
     @Override
     public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
+        mShowHidden = Config.newInstance(getContext()).getShowHidden();
+        fillItems();
+    }
 
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (mShowHidden != Config.newInstance(getContext()).getShowHidden()) {
+            mShowHidden = !mShowHidden;
+            fillItems();
+        }
+    }
+
+    private void fillItems() {
         final String path = getArguments().getString(Constants.PATH);
         mItems = getItems(path);
         Collections.sort(mItems);
@@ -64,6 +79,9 @@ public class ItemsFragment extends android.support.v4.app.Fragment implements Ad
         for (File file : files) {
             final String curPath = file.getAbsolutePath();
             final String curName = Utils.getFilename(curPath);
+            if (!mShowHidden && curName.startsWith("."))
+                continue;
+
             items.add(new FileDirItem(curPath, curName, file.isDirectory()));
         }
         return items;

app/src/main/res/layout/activity_settings.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+    android:id="@+id/settings_scrollview"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <LinearLayout
+        android:id="@+id/settings_holder"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <RelativeLayout
+            android:id="@+id/settings_show_hidden_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/settings_padding"
+            android:background="?android:attr/selectableItemBackground"
+            android:padding="@dimen/activity_margin">
+
+            <TextView
+                android:id="@+id/settings_show_hidden_label"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerVertical="true"
+                android:paddingLeft="@dimen/settings_padding"
+                android:text="@string/show_hidden"/>
+
+            <android.support.v7.widget.SwitchCompat
+                android:id="@+id/settings_show_hidden"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_alignParentRight="true"
+                android:background="@null"
+                android:clickable="false"/>
+
+        </RelativeLayout>
+    </LinearLayout>
+</ScrollView>

app/src/main/res/menu/menu_about.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/settings"
+        android:title="@string/settings"
+        app:showAsAction="never"/>
+</menu>

app/src/main/res/values/dimens.xml

@@ -1,7 +1,7 @@
 <resources>
     <dimen name="activity_margin">16dp</dimen>
-    <dimen name="medium_margin">8dp</dimen>
+    <dimen name="medium_margin">10dp</dimen>
-    <dimen name="icon_size">44dp</dimen>
+    <dimen name="icon_size">48dp</dimen>
     <dimen name="social_padding">8dp</dimen>
     <dimen name="social_logo">40dp</dimen>
     <dimen name="settings_padding">8dp</dimen>

app/src/main/res/values/strings.xml

@@ -19,4 +19,8 @@
     <string name="butterknife_title"><u>Butter Knife (view injector)</u></string>
     <string name="butterknife_text">Copyright 2013 Jake Wharton\n\nLicensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.You may obtain a copy of the License at\n\nhttp://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS,WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.See the License for the specific language governing permissions and limitations under the License.</string>
     <string name="butterknife_url">https://github.com/JakeWharton/butterknife</string>
+
+    <!-- Settings -->
+    <string name="settings">Settings</string>
+    <string name="show_hidden">Show hidden files and directories</string>
 </resources>