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.