Add a setting for the lock screen thumbnail feature

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

@@ -25,13 +25,17 @@ import android.app.Service;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.os.Build;
 import android.os.IBinder;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
 import androidx.core.app.NotificationCompat;
+
+import android.preference.PreferenceManager;
 import android.util.Log;
 import android.view.View;
 import android.widget.RemoteViews;
@@ -77,6 +81,7 @@ public final class BackgroundPlayer extends Service {
 
     private BasePlayerImpl basePlayerImpl;
     private LockManager lockManager;
+    private SharedPreferences sharedPreferences;
 
     /*//////////////////////////////////////////////////////////////////////////
     // Service-Activity Binder
@@ -109,6 +114,7 @@ public final class BackgroundPlayer extends Service {
         if (DEBUG) Log.d(TAG, "onCreate() called");
         notificationManager = ((NotificationManager) getSystemService(NOTIFICATION_SERVICE));
         lockManager = new LockManager(this);
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 
         ThemeHelper.setTheme(this);
         basePlayerImpl = new BasePlayerImpl(this);
@@ -203,10 +209,7 @@ public final class BackgroundPlayer extends Service {
         builder.setCustomBigContentView(bigNotRemoteView);
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            basePlayerImpl.mediaSessionManager.setLockScreenArt(
-                    builder,
-                    getCenteredThumbnailBitmap()
-            );
+            setLockScreenThumbnail(builder);
         }
 
         if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN) {
@@ -215,6 +218,23 @@ public final class BackgroundPlayer extends Service {
         return builder;
     }
 
+    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+    private void setLockScreenThumbnail(NotificationCompat.Builder builder) {
+        boolean isLockScreenThumbnailEnabled = sharedPreferences.getBoolean(
+                getString(R.string.enable_lock_screen_video_thumbnail_key),
+                true
+        );
+
+        if (isLockScreenThumbnailEnabled) {
+            basePlayerImpl.mediaSessionManager.setLockScreenArt(
+                    builder,
+                    getCenteredThumbnailBitmap()
+            );
+        } else {
+            basePlayerImpl.mediaSessionManager.clearLockScreenArt(builder);
+        }
+    }
+
     @Nullable
     private Bitmap getCenteredThumbnailBitmap() {
         int screenWidth = Resources.getSystem().getDisplayMetrics().widthPixels;

app/src/main/java/org/schabi/newpipe/player/helper/MediaSessionManager.java

@@ -74,6 +74,20 @@ public class MediaSessionManager {
         builder.setStyle(mediaStyle);
     }
 
+    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+    public void clearLockScreenArt(NotificationCompat.Builder builder) {
+        mediaSession.setMetadata(
+                new MediaMetadataCompat.Builder()
+                        .putBitmap(MediaMetadata.METADATA_KEY_ALBUM_ART, null)
+                        .build()
+        );
+
+        MediaStyle mediaStyle = new MediaStyle()
+                .setMediaSession(mediaSession.getSessionToken());
+
+        builder.setStyle(mediaStyle);
+    }
+
     /**
      * Should be called on player destruction to prevent leakage.BitmapUtils
      */

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

@@ -175,6 +175,7 @@
     <string name="main_page_content_key" translatable="false">main_page_content</string>
     <string name="enable_playback_resume_key" translatable="false">enable_playback_resume</string>
     <string name="enable_playback_state_lists_key" translatable="false">enable_playback_state_lists</string>
+    <string name="enable_lock_screen_video_thumbnail_key" translatable="false">enable_lock_screen_video_thumbnail</string>
 
     <string name="import_data" translatable="false">import_data</string>
     <string name="export_data" translatable="false">export_data</string>

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

@@ -58,7 +58,9 @@
     <string name="kore_not_found">Kore app not found. Install it?</string>
     <string name="kore_package" translatable="false">org.xbmc.kore</string>
     <string name="show_play_with_kodi_title">Show \"Play with Kodi\" option</string>
+    <string name="enable_lock_screen_video_thumbnail_title">Enable lock screen video thumbnail</string>
     <string name="show_play_with_kodi_summary">Display an option to play a video via Kodi media center</string>
+    <string name="enable_lock_screen_video_thumbnail_summary">When using the background player a video thumbnail will be displayed on the lock screen</string>
     <string name="play_audio">Audio</string>
     <string name="default_audio_format_title">Default audio format</string>
     <string name="default_video_format_title">Default video format</string>

app/src/main/res/xml/video_audio_settings.xml

@@ -81,6 +81,13 @@
             android:summary="@string/show_play_with_kodi_summary"
             android:title="@string/show_play_with_kodi_title"/>
 
+        <SwitchPreference
+            app:iconSpaceReserved="false"
+            android:defaultValue="false"
+            android:key="@string/enable_lock_screen_video_thumbnail_key"
+            android:summary="@string/enable_lock_screen_video_thumbnail_summary"
+            android:title="@string/enable_lock_screen_video_thumbnail_title"/>
+
     </PreferenceCategory>
 
     <PreferenceCategory