How to Set Notification with Custom Sound in Android

How to add custom notification sound in Android

Firstly make the folder in Resource (res) name it raw and put the file (YOUR_SOUND_FILE.MP3) in it and than use below lines of code for custom sound

   NotificationManager notificationManager = (NotificationManager) context
            .getSystemService(Context.NOTIFICATION_SERVICE);
    Notification notification = new Notification(icon, message, when);

    String title = context.getString(R.string.app_name);

    Intent notificationIntent = new Intent(context,
            SlidingMenuActivity.class);
    notificationIntent.putExtra("isInbox", true);
    // set intent so it does not start a new activity
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
            | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent intent = PendingIntent.getActivity(context, 0,
            notificationIntent, 0);
    notification.setLatestEventInfo(context, title, message, intent);
    notification.flags |= Notification.FLAG_AUTO_CANCEL;

Use these lines of code for custom sound

 notification.sound =Uri.parse("android.resource://"+context.getPackageName()+"/"+R.raw.FILE_NAME);//Here is FILE_NAME is the name of file that you want to play

    // Vibrate if vibrate is enabled
    notification.defaults |= Notification.DEFAULT_VIBRATE;
    notificationManager.notify(0, notification);

EDIT UPDATE

For the Oreo and higher , you need to check the SDK_VERSION and use the setSound method of the NotificationChannel

Uri sound = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + context.getPackageName() + "/" + R.raw.FILE_NAME);  //Here is FILE_NAME is the name of file that you want to play

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

            NotificationChannel mChannel = new NotificationChannel("YOUR_CHANNEL_ID",
                "YOUR CHANNEL NAME",
                NotificationManager.IMPORTANCE_DEFAULT)

            AudioAttributes attributes = new AudioAttributes.Builder()
                    .setUsage(AudioAttributes.USAGE_NOTIFICATION)
                    .build();

            NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, 
                    context.getString(R.string.app_name),
                    NotificationManager.IMPORTANCE_HIGH);

            // Configure the notification channel.
            mChannel.setDescription(msg);
            mChannel.enableLights(true);
            mChannel.enableVibration(true);
            mChannel.setSound(sound, attributes); // This is IMPORTANT

            if (mNotificationManager != null)
                mNotificationManager.createNotificationChannel(mChannel);
        }

Custom Notification Sound not working in Android Oreo

To set a sound to notifications in Oreo, you must set sound on NotificationChannel and not on Notification Builder itself. You can do this as follows

Uri sound = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + context.getPackageName() + "/" + R.raw.notification_mp3);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

        NotificationChannel mChannel = new NotificationChannel("YOUR_CHANNEL_ID",
            "YOUR CHANNEL NAME",
            NotificationManager.IMPORTANCE_DEFAULT)

        AudioAttributes attributes = new AudioAttributes.Builder()
                .setUsage(AudioAttributes.USAGE_NOTIFICATION)
                .build();

        NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, 
                context.getString(R.string.app_name),
                NotificationManager.IMPORTANCE_HIGH);

        // Configure the notification channel.
        mChannel.setDescription(msg);
        mChannel.enableLights(true);
        mChannel.enableVibration(true);
        mChannel.setSound(sound, attributes); // This is IMPORTANT

        if (mNotificationManager != null)
            mNotificationManager.createNotificationChannel(mChannel);
    }

This will set a custom sound to your notifications. But if the app is being updated and the notification channel is used before, it won't be updated. i.e. you need to create a different channel and set sound to it to make it work. But this will show multiple channels in the notifications section of app info of your app. If you are setting sound to an entirely new channel that is fine, but if you want the channel being used before, you have to delete the existing channel and recreate the channel. To do that you can do something like that before creating channel

if (mNotificationManager != null) {
            List<NotificationChannel> channelList = mNotificationManager.getNotificationChannels();

            for (int i = 0; channelList != null && i < channelList.size(); i++) {
                mNotificationManager.deleteNotificationChannel(channelList.get(i).getId());
            }
        }

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