Android 通知不显示操作按钮

Question

下面是我用来为媒体播放器应用程序构建通知的方法。目前歌曲信息显示正确，但上一首、播放、下一首动作按钮未显示。

这是调用 buildNotification() 后随通知一起显示的内容；

private void buildNotification(Notification.Action action) {
    String ID = "sage.musicplayer.Service.MusicService";

    /*Bitmap albumArtBitmap = null;
    if(album_art != null) {
        try {
            albumArtBitmap = Glide.with(getApplicationContext()).asBitmap().load(album_art).into(100, 100).get();
        }catch(Exception e) {
            e.printStackTrace();
        }
    }else if(albumID > -1) {
        albumArtBitmap = musicUtils.getAlbumArt(albumID);
    }else{
        albumArtBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.new_album_art);
    }*/

    Intent intent = new Intent(MusicService.this, MainActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_IMMUTABLE);
    Intent intentPrev = new Intent(ACTION_PREV);
    Intent intentPlayPause;
    if(isPng())
        intentPlayPause = new Intent(ACTION_PAUSE);
    else
        intentPlayPause = new Intent(ACTION_PLAY);
    Intent intentNext = new Intent(ACTION_NEXT);
    PendingIntent pendingPrev = PendingIntent.getActivity(this, 0, intentPrev, PendingIntent.FLAG_IMMUTABLE);
    PendingIntent pendingPlayPause = PendingIntent.getActivity(this, 0, intentPlayPause, PendingIntent.FLAG_IMMUTABLE);
    PendingIntent pendingNext = PendingIntent.getActivity(this, 0, intentNext, PendingIntent.FLAG_IMMUTABLE);

    NotificationCompat.Builder notification = new NotificationCompat.Builder(getApplicationContext());
    notification.setContentTitle(songTitle)
            .setWhen(System.currentTimeMillis())
            .setChannelId(ID)
            .setSmallIcon(R.drawable.logo)
            .setContentText(songArtist)
            .setLargeIcon(musicUtils.getAlbumArt(albumID))
            .setDeleteIntent(pendingIntent)
            .setPriority(Notification.PRIORITY_MAX)
            .setStyle(new androidx.media.app.NotificationCompat.MediaStyle().setMediaSession(MediaSessionCompat.Token.fromToken(mediaSession.getSessionToken())))
            .addAction(R.drawable.prev, "Prev", pendingPrev)
            .addAction(R.drawable.playbutton, "Play", pendingPlayPause)
            .addAction(R.drawable.next, "Next", pendingNext);

    NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(getApplicationContext());
    notificationManagerCompat.notify(NOTIFY_ID, notification.build());
}

Answer 1

如果您的可绘制对象（R.drawable.prev 等）是矢量图而不是图像，则无法使用。我今天遇到了同样的问题。

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