通知自定义声音在前景中播放，但在后台应用程序中不播放

Question

我正在为我的应用程序添加自定义声音。当应用程序在前景中时，自定义铃声正在播放，但是当应用程序在背景中时，自定义声音没有播放。

  private void sendMyNotification(String message) {

    Intent intent = new Intent(this, BaseActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);

    Uri soundUri = Uri.parse("android.resource://" + getApplicationContext().getPackageName() + "/" + R.raw.ring);


    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, "CH_ID")
            .setSmallIcon(R.mipmap.iconfinal)
            .setContentTitle(getString(R.string.app_name))
            .setContentText(message)
            .setAutoCancel(true)
            .setSound(soundUri)
            .setContentIntent(pendingIntent);

    NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {

        if(soundUri != null){
            // Changing Default mode of notification
            notificationBuilder.setDefaults(Notification.DEFAULT_VIBRATE);
            // Creating an Audio Attribute
            AudioAttributes audioAttributes = new AudioAttributes.Builder()
                    .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
                    .setUsage(AudioAttributes.USAGE_ALARM)
                    .build();

            // Creating Channel
            NotificationChannel notificationChannel = new NotificationChannel("CH_ID","Testing_Audio",NotificationManager.IMPORTANCE_HIGH);
            notificationChannel.setSound(soundUri,audioAttributes);
            mNotificationManager.createNotificationChannel(notificationChannel);
        }
    }
    mNotificationManager.notify(1, notificationBuilder.build());
}

Answer 1

首先，您需要从服务器端传递声音文件名。如下面的示例：

{
  "to": "firebase_notification_token",
  "notification": {
    "title": "Push notification title",
    "body": "Push body",
    "sound": "filename", <-- point to src/res/raw/filename.mp3
  }
}

您需要添加以下代码才能在应用程序处于后台时播放自定义声音。

val channelId = getString(R.string.app_name)
    val NOTIFICATION_SOUND_URI =
        Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + BuildConfig.APPLICATION_ID + "/" + R.raw.filename)
    val notificationBuilder = NotificationCompat.Builder(this, channelId)

val notification: Notification
notification = notificationBuilder.setSmallIcon(R.drawable.ic_logo_white).setTicker(getString(R.string.app_name)).setWhen(0)
    .setAutoCancel(true)
    .setContentTitle(getString(R.string.app_name))
    .setSound(NOTIFICATION_SOUND_URI)
    .setSmallIcon(R.mipmap.ic_launcher)
    .setContentText(messageBody)
    .build()

有关更多详细信息，请参见此Document。感谢Ilya Eremin的精彩文章。