android - 更改按钮时如何避免闪烁通知更新

Question

我有一个Notification，它支持播放，向前和向后暂停。

private static Notification createNotification(String interpret, String title, boolean paused) {
//  if (builder == null)
       builder = new NotificationCompat.Builder(context);

    builder.setPriority(Notification.PRIORITY_MAX);
    builder.setAutoCancel(false);
    builder.setContentTitle(title);
    builder.setContentText(interpret);
    builder.setOngoing(true);
    builder.setOnlyAlertOnce(true);
    builder.setSmallIcon(R.drawable.ic_launcher);
    builder.setContentIntent(PendingIntent.getActivity(context, 9, new Intent(context, ApplicationActivity.class), Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT));
    builder.addAction(R.drawable.av_previous, "", PendingIntent.getBroadcast(context.getApplicationContext(), 0, new Intent(NotificationPlayerControlReceiver.MUSIC_PLAYER_INTENT).putExtra("resultcode", NotificationPlayerControlReceiver.PREVIOUS), PendingIntent.FLAG_CANCEL_CURRENT));

    if (paused)
        builder.addAction(R.drawable.av_play, "", PendingIntent.getBroadcast(context.getApplicationContext(), 2, new Intent(NotificationPlayerControlReceiver.MUSIC_PLAYER_INTENT).putExtra("resultcode", NotificationPlayerControlReceiver.PLAY), PendingIntent.FLAG_CANCEL_CURRENT));
    else
        builder.addAction(R.drawable.av_pause, "", PendingIntent.getBroadcast(context.getApplicationContext(), 3, new Intent(NotificationPlayerControlReceiver.MUSIC_PLAYER_INTENT).putExtra("resultcode", NotificationPlayerControlReceiver.PAUSE), PendingIntent.FLAG_CANCEL_CURRENT));

    builder.addAction(R.drawable.av_next, "", PendingIntent.getBroadcast(context.getApplicationContext(), 1, new Intent(NotificationPlayerControlReceiver.MUSIC_PLAYER_INTENT).putExtra("resultcode", NotificationPlayerControlReceiver.NEXT), PendingIntent.FLAG_CANCEL_CURRENT));

    Notification notification = builder.build();

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
        notification.tickerView = null;

    return notification;
}

更新通知:

 public static void update(String interpret, String title, boolean paused) {
    NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    manager.notify(0, createNotification(interpret, title, paused));
}

为了避免在更新时闪烁，我将构建器设置为一个全局变量，并在每次更新时重复使用它，效果很好。但是重复使用它意味着我添加的所有按钮也被重复使用，并且不可能删除我之前添加的操作。

如果我在每次更新时重新初始化 NotificationCompat.Builder，按钮更改才有效，这意味着我会再次闪烁。

如何避免闪烁，但让按钮发生变化？

编辑:刚检查了 Rocket Player，他们也没有解决问题，但 Google Play Music 解决了

Answer 1

就像鲍里斯所说，问题是每次更新都会生成一个新通知。我的解决方案涵盖相同的逻辑，但我使用 NotificationBuilder...

代码如下:

if (mNotificationBuilder == null) {
            mNotificationBuilder = new NotificationCompat.Builder(this)
                    .setSmallIcon(iconId)
                    .setContentTitle(title)
                    .setContentText(message)
                    .setLargeIcon(largeIcon)
                    .setOngoing(true)
                    .setAutoCancel(false);
        } else {
            mNotificationBuilder.setContentTitle(title)
                    .setContentText(message);
        }

请记住，mNotificationBuilder 是类中的私有(private)字段。