-Added fast seeking on background notification when play queue size is 1.

-Fixed player intent with quality selection not used in detail fragment.
-Fixed window index not reset on sync when not playing.
-Fix dropdown play string for stream info item.

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

@@ -66,6 +66,7 @@ import org.schabi.newpipe.info_list.InfoItemBuilder;
 import org.schabi.newpipe.player.BackgroundPlayer;
 import org.schabi.newpipe.player.MainVideoPlayer;
 import org.schabi.newpipe.player.PopupVideoPlayer;
+import org.schabi.newpipe.player.helper.PlayerHelper;
 import org.schabi.newpipe.player.old.PlayVideoActivity;
 import org.schabi.newpipe.playlist.PlayQueue;
 import org.schabi.newpipe.playlist.SinglePlayQueue;
@@ -800,7 +801,11 @@ public class VideoDetailFragment extends BaseStateFragment<StreamInfo> implement
         if (append) {
             NavigationHelper.enqueueOnPopupPlayer(activity, itemQueue);
         } else {
-            NavigationHelper.playOnPopupPlayer(activity, itemQueue);
+            Toast.makeText(activity, R.string.popup_playing_toast, Toast.LENGTH_SHORT).show();
+            final Intent intent = NavigationHelper.getPlayerIntent(
+                    activity, PopupVideoPlayer.class, itemQueue, getSelectedVideoStream().resolution
+            );
+            activity.startService(intent);
         }
     }
 
@@ -863,20 +868,21 @@ public class VideoDetailFragment extends BaseStateFragment<StreamInfo> implement
     }
 
     private void openNormalPlayer(VideoStream selectedVideoStream) {
-        boolean useOldPlayer = PreferenceManager.getDefaultSharedPreferences(activity).getBoolean(getString(R.string.use_old_player_key), false)
+        Intent mIntent;
-                || (Build.VERSION.SDK_INT < 16);
+        boolean useOldPlayer = PlayerHelper.isUsingOldPlayer(activity) || (Build.VERSION.SDK_INT < 16);
         if (!useOldPlayer) {
             // ExoPlayer
-            NavigationHelper.playOnMainPlayer(activity, new SinglePlayQueue(currentInfo));
+            final PlayQueue playQueue = new SinglePlayQueue(currentInfo);
+            mIntent = NavigationHelper.getPlayerIntent(activity, MainVideoPlayer.class, playQueue, getSelectedVideoStream().resolution);
         } else {
             // Internal Player
-            final Intent mIntent = new Intent(activity, PlayVideoActivity.class)
+            mIntent = new Intent(activity, PlayVideoActivity.class)
                     .putExtra(PlayVideoActivity.VIDEO_TITLE, currentInfo.name)
                     .putExtra(PlayVideoActivity.STREAM_URL, selectedVideoStream.url)
                     .putExtra(PlayVideoActivity.VIDEO_URL, currentInfo.url)
                     .putExtra(PlayVideoActivity.START_POSITION, currentInfo.start_position);
-            startActivity(mIntent);
         }
+        startActivity(mIntent);
     }
 
     private void openExternalVideoPlayer(VideoStream selectedVideoStream) {

app/src/main/java/org/schabi/newpipe/info_list/holder/StreamMiniInfoItemHolder.java

@@ -133,7 +133,7 @@ public class StreamMiniInfoItemHolder extends InfoItemHolder {
             }
         });
         
-        final MenuItem mainPlay = actionMenu.getMenu().add(R.string.play_all);
+        final MenuItem mainPlay = actionMenu.getMenu().add(R.string.play_btn_text);
         mainPlay.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
             @Override
             public boolean onMenuItemClick(MenuItem menuItem) {

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

@@ -69,6 +69,10 @@ public final class BackgroundPlayer extends Service {
     public static final String ACTION_REPEAT = "org.schabi.newpipe.player.BackgroundPlayer.REPEAT";
     public static final String ACTION_PLAY_NEXT = "org.schabi.newpipe.player.BackgroundPlayer.ACTION_PLAY_NEXT";
     public static final String ACTION_PLAY_PREVIOUS = "org.schabi.newpipe.player.BackgroundPlayer.ACTION_PLAY_PREVIOUS";
+    public static final String ACTION_FAST_REWIND = "org.schabi.newpipe.player.BackgroundPlayer.ACTION_FAST_REWIND";
+    public static final String ACTION_FAST_FORWARD = "org.schabi.newpipe.player.BackgroundPlayer.ACTION_FAST_FORWARD";
+
+    public static final String SET_IMAGE_RESOURCE_METHOD = "setImageResource";
 
     private BasePlayerImpl basePlayerImpl;
     private LockManager lockManager;
@@ -182,6 +186,8 @@ public final class BackgroundPlayer extends Service {
     }
 
     private void setupNotification(RemoteViews remoteViews) {
+        if (basePlayerImpl == null) return;
+
         remoteViews.setTextViewText(R.id.notificationSongName, basePlayerImpl.getVideoTitle());
         remoteViews.setTextViewText(R.id.notificationArtist, basePlayerImpl.getUploaderName());
 
@@ -194,10 +200,21 @@ public final class BackgroundPlayer extends Service {
         remoteViews.setOnClickPendingIntent(R.id.notificationRepeat,
                 PendingIntent.getBroadcast(this, NOTIFICATION_ID, new Intent(ACTION_REPEAT), PendingIntent.FLAG_UPDATE_CURRENT));
 
+        if (basePlayerImpl.playQueue != null && basePlayerImpl.playQueue.size() > 1) {
+            remoteViews.setInt(R.id.notificationFRewind, SET_IMAGE_RESOURCE_METHOD, R.drawable.exo_controls_previous);
+            remoteViews.setInt(R.id.notificationFForward, SET_IMAGE_RESOURCE_METHOD, R.drawable.exo_controls_next);
             remoteViews.setOnClickPendingIntent(R.id.notificationFRewind,
                     PendingIntent.getBroadcast(this, NOTIFICATION_ID, new Intent(ACTION_PLAY_PREVIOUS), PendingIntent.FLAG_UPDATE_CURRENT));
             remoteViews.setOnClickPendingIntent(R.id.notificationFForward,
                     PendingIntent.getBroadcast(this, NOTIFICATION_ID, new Intent(ACTION_PLAY_NEXT), PendingIntent.FLAG_UPDATE_CURRENT));
+        } else {
+            remoteViews.setInt(R.id.notificationFRewind, SET_IMAGE_RESOURCE_METHOD, R.drawable.exo_controls_rewind);
+            remoteViews.setInt(R.id.notificationFForward, SET_IMAGE_RESOURCE_METHOD, R.drawable.exo_controls_fastforward);
+            remoteViews.setOnClickPendingIntent(R.id.notificationFRewind,
+                    PendingIntent.getBroadcast(this, NOTIFICATION_ID, new Intent(ACTION_FAST_REWIND), PendingIntent.FLAG_UPDATE_CURRENT));
+            remoteViews.setOnClickPendingIntent(R.id.notificationFForward,
+                    PendingIntent.getBroadcast(this, NOTIFICATION_ID, new Intent(ACTION_FAST_FORWARD), PendingIntent.FLAG_UPDATE_CURRENT));
+        }
 
         setRepeatModeIcon(remoteViews, basePlayerImpl.getRepeatMode());
     }
@@ -232,17 +249,15 @@ public final class BackgroundPlayer extends Service {
     //////////////////////////////////////////////////////////////////////////*/
 
     private void setRepeatModeIcon(final RemoteViews remoteViews, final int repeatMode) {
-        final String methodName = "setImageResource";
-
         switch (repeatMode) {
             case Player.REPEAT_MODE_OFF:
-                remoteViews.setInt(R.id.notificationRepeat, methodName, R.drawable.exo_controls_repeat_off);
+                remoteViews.setInt(R.id.notificationRepeat, SET_IMAGE_RESOURCE_METHOD, R.drawable.exo_controls_repeat_off);
                 break;
             case Player.REPEAT_MODE_ONE:
-                remoteViews.setInt(R.id.notificationRepeat, methodName, R.drawable.exo_controls_repeat_one);
+                remoteViews.setInt(R.id.notificationRepeat, SET_IMAGE_RESOURCE_METHOD, R.drawable.exo_controls_repeat_one);
                 break;
             case Player.REPEAT_MODE_ALL:
-                remoteViews.setInt(R.id.notificationRepeat, methodName, R.drawable.exo_controls_repeat_all);
+                remoteViews.setInt(R.id.notificationRepeat, SET_IMAGE_RESOURCE_METHOD, R.drawable.exo_controls_repeat_all);
                 break;
         }
     }
@@ -441,6 +456,8 @@ public final class BackgroundPlayer extends Service {
             intentFilter.addAction(ACTION_REPEAT);
             intentFilter.addAction(ACTION_PLAY_PREVIOUS);
             intentFilter.addAction(ACTION_PLAY_NEXT);
+            intentFilter.addAction(ACTION_FAST_REWIND);
+            intentFilter.addAction(ACTION_FAST_FORWARD);
 
             intentFilter.addAction(Intent.ACTION_SCREEN_ON);
             intentFilter.addAction(Intent.ACTION_SCREEN_OFF);
@@ -472,6 +489,12 @@ public final class BackgroundPlayer extends Service {
                 case ACTION_PLAY_PREVIOUS:
                     onPlayPrevious();
                     break;
+                case ACTION_FAST_FORWARD:
+                    onFastForward();
+                    break;
+                case ACTION_FAST_REWIND:
+                    onFastRewind();
+                    break;
                 case Intent.ACTION_SCREEN_ON:
                     onScreenOnOff(true);
                     break;

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

@@ -646,7 +646,7 @@ public abstract class BasePlayer implements Player.EventListener, PlaybackListen
         if (currentSourceIndex != playQueue.getIndex()) {
             Log.e(TAG, "Play Queue may be desynchronized: item index=[" + currentSourceIndex +
                     "], queue index=[" + playQueue.getIndex() + "]");
-        } else if (simpleExoPlayer.getCurrentWindowIndex() != currentSourceIndex) {
+        } else if (simpleExoPlayer.getCurrentWindowIndex() != currentSourceIndex || !isPlaying()) {
             final long startPos = info != null ? info.start_position : 0;
             if (DEBUG) Log.d(TAG, "Rewinding to correct window: " + currentSourceIndex + " at: " + getTimeString((int)startPos));
             simpleExoPlayer.seekTo(currentSourceIndex, startPos);
@@ -761,10 +761,6 @@ public abstract class BasePlayer implements Player.EventListener, PlaybackListen
         } else {
             playQueue.setIndex(index);
         }
-
-        if (!isPlaying()) {
-            onVideoPlayPause();
-        }
     }
 
     public void seekBy(int milliSeconds) {