Added statistics function

Fixes #1743

app/src/main/AndroidManifest.xml

@@ -144,6 +144,13 @@
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value="de.danoeh.antennapod.activity.PreferenceActivity"/>
         </activity>
+        <activity
+            android:name=".activity.StatisticsActivity"
+            android:label="@string/statistics_label">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value="de.danoeh.antennapod.activity.PreferenceActivity"/>
+        </activity>
         <activity
             android:name=".activity.OpmlImportFromPathActivity"
             android:configChanges="keyboardHidden|orientation"

app/src/main/java/de/danoeh/antennapod/activity/StatisticsActivity.java

@@ -0,0 +1,107 @@
+package de.danoeh.antennapod.activity;
+
+import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ListView;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.adapter.StatisticsListAdapter;
+import de.danoeh.antennapod.core.preferences.UserPreferences;
+import de.danoeh.antennapod.core.storage.DBReader;
+import de.danoeh.antennapod.core.util.Converter;
+import rx.Observable;
+import rx.Subscription;
+import rx.android.schedulers.AndroidSchedulers;
+import rx.schedulers.Schedulers;
+
+/**
+ * Displays the 'statistics' screen
+ */
+public class StatisticsActivity extends AppCompatActivity
+        implements AdapterView.OnItemClickListener {
+
+    private static final String TAG = StatisticsActivity.class.getSimpleName();
+
+    private Subscription subscription;
+    private TextView totalTimeTextView;
+    private ListView feedStatisticsList;
+    private ProgressBar progressBar;
+    private StatisticsListAdapter listAdapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        setTheme(UserPreferences.getTheme());
+        super.onCreate(savedInstanceState);
+        getSupportActionBar().setDisplayShowHomeEnabled(true);
+        setContentView(R.layout.statistics_activity);
+
+        totalTimeTextView = (TextView) findViewById(R.id.total_time);
+        feedStatisticsList = (ListView) findViewById(R.id.statistics_list);
+        progressBar = (ProgressBar) findViewById(R.id.progressBar);
+        listAdapter = new StatisticsListAdapter(this);
+        feedStatisticsList.setAdapter(listAdapter);
+        feedStatisticsList.setOnItemClickListener(this);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        progressBar.setVisibility(View.VISIBLE);
+        totalTimeTextView.setVisibility(View.GONE);
+        feedStatisticsList.setVisibility(View.GONE);
+        loadStats();
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == android.R.id.home) {
+            finish();
+            return true;
+        } else {
+            return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private void loadStats() {
+        if(subscription != null) {
+            subscription.unsubscribe();
+        }
+        subscription = Observable.fromCallable(() -> DBReader.getStatistics())
+                .subscribeOn(Schedulers.newThread())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(result -> {
+                    if (result != null) {
+                        totalTimeTextView.setText(Converter
+                                .shortLocalizedDuration(this, result.totalTime));
+                        listAdapter.update(result.feedTime);
+                        progressBar.setVisibility(View.GONE);
+                        totalTimeTextView.setVisibility(View.VISIBLE);
+                        feedStatisticsList.setVisibility(View.VISIBLE);
+                    }
+                }, error -> {
+                    Log.e(TAG, Log.getStackTraceString(error));
+                });
+    }
+
+    @Override
+    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+        DBReader.StatisticsItem stats = listAdapter.getItem(position);
+
+        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        dialog.setTitle(stats.feed.getTitle());
+        dialog.setMessage(getString(R.string.statistics_details_dialog,
+                stats.episodesStarted,
+                stats.episodes,
+                Converter.shortLocalizedDuration(this, stats.timePlayed),
+                Converter.shortLocalizedDuration(this, stats.time)));
+        dialog.setPositiveButton(android.R.string.ok, null);
+        dialog.show();
+    }
+}

app/src/main/java/de/danoeh/antennapod/adapter/StatisticsListAdapter.java

@@ -0,0 +1,97 @@
+package de.danoeh.antennapod.adapter;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.bumptech.glide.Glide;
+import com.joanzapata.iconify.widget.IconTextView;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.core.feed.Feed;
+import de.danoeh.antennapod.core.glide.ApGlideSettings;
+import de.danoeh.antennapod.core.storage.DBReader;
+import de.danoeh.antennapod.core.util.Converter;
+
+/**
+ * Adapter for the statistics list
+ */
+public class StatisticsListAdapter extends BaseAdapter {
+    private Context context;
+    List<DBReader.StatisticsItem> feedTime = new ArrayList<>();
+
+    public StatisticsListAdapter(Context context) {
+        this.context = context;
+    }
+
+
+    @Override
+    public int getCount() {
+        return feedTime.size();
+    }
+
+    @Override
+    public DBReader.StatisticsItem getItem(int position) {
+        return feedTime.get(position);
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return feedTime.get(position).feed.getId();
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        StatisticsHolder holder;
+        Feed feed = feedTime.get(position).feed;
+
+        if (convertView == null) {
+            holder = new StatisticsHolder();
+            LayoutInflater inflater = (LayoutInflater) context
+                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+
+            convertView = inflater.inflate(R.layout.statistics_listitem, parent, false);
+
+            holder.image = (ImageView) convertView.findViewById(R.id.imgvCover);
+            holder.title = (TextView) convertView.findViewById(R.id.txtvTitle);
+            holder.time = (TextView) convertView.findViewById(R.id.txtvTime);
+            convertView.setTag(holder);
+        } else {
+            holder = (StatisticsHolder) convertView.getTag();
+        }
+
+        Glide.with(context)
+                .load(feed.getImageUri())
+                .placeholder(R.color.light_gray)
+                .error(R.color.light_gray)
+                .diskCacheStrategy(ApGlideSettings.AP_DISK_CACHE_STRATEGY)
+                .fitCenter()
+                .dontAnimate()
+                .into(holder.image);
+
+        holder.title.setText(feed.getTitle());
+        holder.time.setText(Converter.shortLocalizedDuration(context,
+                feedTime.get(position).timePlayed));
+        return convertView;
+    }
+
+    public void update(List<DBReader.StatisticsItem> feedTime) {
+        this.feedTime = feedTime;
+        notifyDataSetChanged();
+    }
+
+    static class StatisticsHolder {
+        ImageView image;
+        TextView title;
+        TextView time;
+    }
+
+}

app/src/main/java/de/danoeh/antennapod/preferences/PreferenceController.java

@@ -49,6 +49,7 @@ import de.danoeh.antennapod.activity.DirectoryChooserActivity;
 import de.danoeh.antennapod.activity.MainActivity;
 import de.danoeh.antennapod.activity.PreferenceActivity;
 import de.danoeh.antennapod.activity.PreferenceActivityGingerbread;
+import de.danoeh.antennapod.activity.StatisticsActivity;
 import de.danoeh.antennapod.asynctask.OpmlExportWorker;
 import de.danoeh.antennapod.core.preferences.GpodnetPreferences;
 import de.danoeh.antennapod.core.preferences.UserPreferences;
@@ -75,6 +76,7 @@ public class PreferenceController implements SharedPreferences.OnSharedPreferenc
     public static final String PREF_FLATTR_REVOKE = "prefRevokeAccess";
     public static final String PREF_AUTO_FLATTR_PREFS = "prefAutoFlattrPrefs";
     public static final String PREF_OPML_EXPORT = "prefOpmlExport";
+    public static final String STATISTICS = "statistics";
     public static final String PREF_ABOUT = "prefAbout";
     public static final String PREF_CHOOSE_DATA_DIR = "prefChooseDataDir";
     public static final String AUTO_DL_PREF_SCREEN = "prefAutoDownloadSettings";
@@ -153,6 +155,12 @@ public class PreferenceController implements SharedPreferences.OnSharedPreferenc
                     return true;
                 }
         );
+        ui.findPreference(PreferenceController.STATISTICS).setOnPreferenceClickListener(
+                preference -> {
+                    activity.startActivity(new Intent(activity, StatisticsActivity.class));
+                    return true;
+                }
+        );
         ui.findPreference(PreferenceController.PREF_OPML_EXPORT).setOnPreferenceClickListener(
                 preference -> {
                     new OpmlExportWorker(activity).executeAsync();

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

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingTop="8dp"
+    android:paddingBottom="8dp">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/total_time_listened_to_podcasts"
+        android:gravity="center_horizontal"/>
+
+    <ProgressBar
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/progressBar"
+        android:layout_gravity="center_horizontal"
+        style="?android:attr/progressBarStyleLarge"/>
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/total_time"
+        android:gravity="center_horizontal"
+        android:textSize="45sp"/>
+
+    <ListView
+        android:id="@+id/statistics_list"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:choiceMode="singleChoice"
+        android:clipToPadding="false"
+        android:divider="@android:color/transparent"
+        android:dividerHeight="0dp"
+        android:paddingBottom="@dimen/list_vertical_padding"
+        android:paddingTop="@dimen/list_vertical_padding"
+        android:scrollbarStyle="outsideOverlay" />
+
+</LinearLayout>

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

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                xmlns:tools="http://schemas.android.com/tools"
+                android:orientation="vertical"
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/listitem_iconwithtext_height"
+                android:paddingRight="@dimen/listitem_threeline_verticalpadding"
+                tools:background="@android:color/darker_gray">
+
+    <ImageView
+        android:id="@+id/imgvCover"
+        android:contentDescription="@string/cover_label"
+        android:layout_width="@dimen/thumbnail_length_navlist"
+        android:layout_height="@dimen/thumbnail_length_navlist"
+        android:layout_alignParentLeft="true"
+        android:layout_centerVertical="true"
+        android:adjustViewBounds="true"
+        android:cropToPadding="true"
+        android:scaleType="centerCrop"
+        android:layout_marginTop="4dp"
+        android:layout_marginBottom="4dp"
+        android:layout_marginLeft="@dimen/listitem_icon_leftpadding"
+        tools:src="@drawable/ic_stat_antenna_default"
+        tools:background="@android:color/holo_green_dark"/>
+
+    <TextView
+        android:id="@+id/txtvTime"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="@dimen/list_vertical_padding"
+        android:lines="1"
+        android:textColor="?android:attr/textColorTertiary"
+        android:textSize="@dimen/text_size_navdrawer"
+        android:layout_alignParentRight="true"
+        android:layout_centerVertical="true"
+        tools:text="23"
+        tools:background="@android:color/holo_green_dark"/>
+
+    <TextView
+        android:id="@+id/txtvTitle"
+        android:lines="1"
+        android:ellipsize="end"
+        android:singleLine="true"
+        android:layout_centerVertical="true"
+        android:textColor="?android:attr/textColorPrimary"
+        android:textSize="@dimen/text_size_navdrawer"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="@dimen/listitem_iconwithtext_textleftpadding"
+        android:layout_toRightOf="@id/imgvCover"
+        android:layout_toLeftOf="@id/txtvTime"
+        android:layout_alignWithParentIfMissing="true"
+        tools:text="Navigation feed item title"
+        tools:background="@android:color/holo_green_dark"/>
+
+
+</RelativeLayout>

app/src/main/res/xml/preferences.xml

@@ -268,6 +268,9 @@
         <Preference
             android:key="prefOpmlExport"
             android:title="@string/opml_export_label"/>
+        <Preference
+            android:key="statistics"
+            android:title="@string/statistics_label"/>
         <Preference
             android:key="prefAbout"
             android:title="@string/about_pref"/>

core/src/main/java/de/danoeh/antennapod/core/storage/DBReader.java

@@ -917,6 +917,88 @@ public final class DBReader {
         return media;
     }
 
+    /**
+     * Searches the DB for statistics
+     *
+     * @return The StatisticsInfo object
+     */
+    public static StatisticsData getStatistics() {
+        PodDBAdapter adapter = PodDBAdapter.getInstance();
+        adapter.open();
+
+        long totalTime = 0;
+        List<StatisticsItem> feedTime = new ArrayList<>();
+
+        List<Feed> feeds = getFeedList();
+        for (Feed feed : feeds) {
+            long feedPlayedTime = 0;
+            long feedTotalTime = 0;
+            long episodes = 0;
+            long episodesStarted = 0;
+            List<FeedItem> items = getFeed(feed.getId()).getItems();
+            for(FeedItem item : items) {
+                FeedMedia media = item.getMedia();
+                if(media == null) {
+                    continue;
+                }
+
+                if(item.isPlayed()) {
+                    feedPlayedTime += media.getDuration() / 1000;
+                } else {
+                    feedPlayedTime += media.getPosition() / 1000;
+                }
+                if(item.isPlayed() || media.getPosition() != 0) {
+                    episodesStarted++;
+                }
+                feedTotalTime += media.getDuration() / 1000;
+                episodes++;
+            }
+            feedTime.add(new StatisticsItem(
+                    feed, feedTotalTime, feedPlayedTime, episodes, episodesStarted));
+            totalTime += feedPlayedTime;
+        }
+
+        Collections.sort(feedTime, (item1, item2) -> {
+            if(item1.timePlayed > item2.timePlayed) {
+                return -1;
+            } else if(item1.timePlayed < item2.timePlayed) {
+                return 1;
+            } else {
+                return 0;
+            }
+        });
+
+        adapter.close();
+        return new StatisticsData(totalTime, feedTime);
+    }
+
+    public static class StatisticsData {
+        public long totalTime;
+        public List<StatisticsItem> feedTime;
+
+        public StatisticsData(long totalTime, List<StatisticsItem> feedTime) {
+            this.totalTime = totalTime;
+            this.feedTime = feedTime;
+        }
+    }
+
+    public static class StatisticsItem {
+        public Feed feed;
+        public long time;
+        public long timePlayed;
+        public long episodes;
+        public long episodesStarted;
+
+        public StatisticsItem(Feed feed, long time, long timePlayed,
+                              long episodes, long episodesStarted) {
+            this.feed = feed;
+            this.time = time;
+            this.timePlayed = timePlayed;
+            this.episodes = episodes;
+            this.episodesStarted = episodesStarted;
+        }
+    }
+
     /**
      * Returns the flattr queue as a List of FlattrThings. The list consists of Feeds and FeedItems.
      *

core/src/main/java/de/danoeh/antennapod/core/util/Converter.java

@@ -3,6 +3,8 @@ package de.danoeh.antennapod.core.util;
 import android.content.Context;
 import android.util.Log;
 
+import java.util.Locale;
+
 import de.danoeh.antennapod.core.R;
 
 /** Provides methods for converting various units. */
@@ -119,6 +121,16 @@ public final class Converter {
         return result;
     }
 
+    /**
+     * Converts seconds to a localized representation
+     * @param time The time in seconds
+     * @return "HH:MM hours"
+     */
+    public static String shortLocalizedDuration(Context context, long time) {
+        float hours = (float) time / 3600f;
+        return String.format(Locale.getDefault(), "%.1f ", hours) + context.getString(R.string.time_hours);
+    }
+
     /**
      * Converts the volume as read as the progress from a SeekBar scaled to 100 and as saved in
      * UserPreferences to the format taken by setVolume methods.

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

@@ -6,6 +6,7 @@
     <!-- Activitiy and fragment titles -->
     <string name="app_name">AntennaPod</string>
     <string name="feeds_label">Feeds</string>
+    <string name="statistics_label">Statistics</string>
     <string name="add_feed_label">Add Podcast</string>
     <string name="podcasts_label">PODCASTS</string>
     <string name="episodes_label">Episodes</string>
@@ -33,6 +34,10 @@
     <string name="recently_published_episodes_label">Recently published</string>
     <string name="episode_filter_label">Show only new Episodes</string>
 
+    <!-- Statistics fragment -->
+    <string name="total_time_listened_to_podcasts">Total time of podcasts played:</string>
+    <string name="statistics_details_dialog">%1$d out of %2$d episodes started.\n\nPlayed %3$s out of %4$s.</string>
+
     <!-- Main activity -->
     <string name="drawer_open">Open menu</string>
     <string name="drawer_close">Close menu</string>