通知声音在系统中静音

Question

On the system, notifications are muted for my app. How do I allow my app to play sound for notifications by default? It's on all phones

Answer 1

Normally the following code controls the notification sound

NotificationChannel channel = new NotificationChannel(CHANNEL_ID, "name", NotificationManager.IMPORTANCE_LOW);

Low importance means notifications are muted. High importance notifications notify the user.

But if the Android System disables the sound for an application, you might not be able to play sound for the notification.

Answer 2

On pre Oreo devices, you can enable the notification sound by making the priority high

  NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, CHANNEL_ID)
            .setPriority(NotificationCompat.PRIORITY_HIGH) // Set priority to PRIORITY_HIGH to enable notification sound 
            .setContentIntent(pendingIntent)
            .setAutoCancel(true); 

On Oreo and above devices, you must create a channel for the notification

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        // Set importance to IMPORTANCE_HIGH to enable notification sound on Android 8.0 and above
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, "channel name", NotificationManager.IMPORTANCE_HIGH);
        notificationManager.createNotificationChannel(channel);
    }