Android notification setSound is not working

In my hybrid Cordova Android app targeting API 23+ I want to use a custom sound for notifications. To that end I have done the following

• In plugin.xml file for the single custom plugin I use in the app I declare <resource-file src="src/android/res/unysound.mp3" target="res/raw/mysound.mp3" />'.

Opening the APK as a zip archive I see that the mp3 file has in fact ended up in `res/raw/mysound.mp3'. - When building the notification I do the following

    Notification notification = new Notification.Builder(context)
    .setDefaults(0) //turns off ALL defaults
    .setVibrate(vibrate)  /sets to vibrate
    ....
    .setSound(uri).build();

where

Uri uri = Uri.parse("android.resource://" + ctxt.getPackageName() + "/raw/mysound.mp3");

This appears to be the recipe indicated in a number of articles I find on a spot of googling and even in other threads on SO. And yet, when I issue a notification I do not hear the expected sound. What might I be doing wrong?

---

The answer below does not help since in the context of my hybrid Cordova app with a custom plugin attempting to build the APK throws up an error along the lines of class R not known/found...

below code will help you:

 String CHANNEL_ID="1234";

    Uri soundUri = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://"+ getApplicationContext().getPackageName() + "/" + R.raw.mysound);
    NotificationManager mNotificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE); 
    
  //For API 26+ you need to put some additional code like below:
    NotificationChannel mChannel;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                mChannel = new NotificationChannel(CHANNEL_ID, Utils.CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);
                mChannel.setLightColor(Color.GRAY);
                mChannel.enableLights(true);
                mChannel.setDescription(Utils.CHANNEL_SIREN_DESCRIPTION);
                AudioAttributes audioAttributes = new AudioAttributes.Builder()
                        .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
                        .setUsage(AudioAttributes.USAGE_NOTIFICATION)
                        .build();
                mChannel.setSound(soundUri, audioAttributes);
    
                if (mNotificationManager != null) {
                    mNotificationManager.createNotificationChannel( mChannel );
                }
        }

   //General code:
     NotificationCompat.Builder status = new NotificationCompat.Builder(getApplicationContext(),CHANNEL_ID);     
                          status.setAutoCancel(true)
                                .setWhen(System.currentTimeMillis())
                                .setSmallIcon(R.drawable.logo)
                                //.setOnlyAlertOnce(true)
                                .setContentTitle(getString(R.string.app_name))
                                .setContentText(messageBody)
                                .setVibrate(new long[]{0, 500, 1000})
                                .setDefaults(Notification.DEFAULT_LIGHTS )
                                .setSound(Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE+ "://" +mContext.getPackageName()+"/"+R.raw.apple_ring))
                                .setContentIntent(pendingIntent)
                                .setContent(views);
                        
                        mNotificationManager.notify(major_id, status.build());

where mysound is my ringtone which is put under res/raw folder.

Note: you have to only put name of ringtone without extension like raw/mysound

Note: In Android Oreo you must change your channel ID to changes take effect. And before Oreo version, using ".setDefaults()" seens prevent custom sound to play.