在Exoplayer通知中单击暂停按钮时停止动画

Question

我的问题是我向应用程序中添加了一个Exoplayer通知，并且希望在我按下“暂停”按钮时停止MainActivity中的动画。我有一个动画到ImageButton。我知道在正常情况下如何停止动画， 但我不知道如何从通知中停止动画。在下面，我将向您添加我的通知代码。 预先谢谢你！

notificationManager = PlayerNotificationManager.createWithNotificationChannel(
            this,
            CHANNEL_ID,
            R.string.exo_download_notification_channel_name,
            NOTIFICATION_ID,
            new PlayerNotificationManager.MediaDescriptionAdapter() {
                @Override
                public String getCurrentContentTitle(Player player) {
                    return text_song;
                }

                @Nullable
                @Override
                public PendingIntent createCurrentContentIntent(Player player) {
                    Intent intent = new Intent(MainActivity.this, MainActivity.class);
                    PendingIntent contentPendingIntent = PendingIntent.getActivity
                            (MainActivity.this, 0, intent, 0);
                    return contentPendingIntent;
                }
                @Nullable
                @Override
                public String getCurrentContentText(Player player) {
                    return null; 
                }

                @Nullable
                @Override
                public Bitmap getCurrentLargeIcon(Player player, PlayerNotificationManager.BitmapCallback callback) {

                    return null;
                }
            }
    );
    notificationManager.setUseChronometer(true);
    notificationManager.setUseNavigationActions(false);
    notificationManager.setFastForwardIncrementMs(0);
    notificationManager.setRewindIncrementMs(0);
    notificationManager.setPriority(NotificationCompat.PRIORITY_HIGH);
    notificationManager.setPlayer(player);