Merge pull request #2788 from Bnyro/master

Fix the notification thumbnail vanishing

app/src/main/java/com/github/libretube/util/NowPlayingNotification.kt

@@ -38,6 +38,7 @@ class NowPlayingNotification(
 ) {
     private var videoId: String? = null
     private var streams: Streams? = null
+    private var bitmap: Bitmap? = null
 
     /**
      * The [MediaSessionCompat] for the [streams].
@@ -105,8 +106,17 @@ class NowPlayingNotification(
         ): Bitmap? {
             if (DataSaverMode.isEnabled(context)) return null
 
-            var bitmap: Bitmap? = null
+            if (bitmap == null) enqueueThumbnailRequest(callback)
 
+            return bitmap
+        }
+
+        override fun getCurrentSubText(player: Player): CharSequence? {
+            return streams?.uploader
+        }
+    }
+
+    private fun enqueueThumbnailRequest(callback: PlayerNotificationManager.BitmapCallback) {
         val request = ImageRequest.Builder(context)
             .data(streams?.thumbnailUrl)
             .target { result ->
@@ -123,13 +133,6 @@ class NowPlayingNotification(
 
         // enqueue the thumbnail loading request
         ImageHelper.imageLoader.enqueue(request)
-
-            return bitmap
-        }
-
-        override fun getCurrentSubText(player: Player): CharSequence? {
-            return streams?.uploader
-        }
     }
 
     private val customActionReceiver = object : CustomActionReceiver {
@@ -257,6 +260,8 @@ class NowPlayingNotification(
     ) {
         this.videoId = videoId
         this.streams = streams
+        // reset the thumbnail bitmap in order to become reloaded for the new video
+        this.bitmap = null
 
         if (playerNotification == null) {
             createMediaSession()