title: Notification sound on API 26
body: <p>I have a custom mp3 sound that I use on my notifications. It works fine on all devices below API 26. I tried to set the sound on Notification Channel also, but still no work. It plays the default sound.</p>
  
  <pre><code>NotificationCompat.Builder builder = new NotificationCompat.Builder(this, channelId)
              .setAutoCancel(true)
              .setSmallIcon(R.drawable.icon_push)
              .setColor(ContextCompat.getColor(this, R.color.green))
              .setContentTitle(title)
              .setSound(Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.notification))
              .setDefaults(Notification.DEFAULT_VIBRATE)
              .setStyle(new NotificationCompat.BigTextStyle().bigText(message))
              .setContentText(message);
          Notification notification = builder.build();
          NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
          if (android.os.Build.VERSION.SDK_INT &gt;= android.os.Build.VERSION_CODES.O) {
              NotificationChannel channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_DEFAULT);
              AudioAttributes audioAttributes = new AudioAttributes.Builder()
                      .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
                      .setUsage(AudioAttributes.USAGE_NOTIFICATION_RINGTONE)
                      .build();
              channel.setSound(Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.notification), audioAttributes);
              notificationManager.createNotificationChannel(channel);
          }
          notificationManager.notify(1, notification);
  </code></pre>