Android O - Notification Channels - Change Vibration Pattern or Sound Type

Question

With Android O we get the \"Notification Channels\".

As far as I understand that means that the user can\'t set

Answer 1

It is not a good idea to play the sound manually. The best approach would be to have two (or more) channels- one for each sound/vibration you would like to play.

In code you can decide which channel to use depending on which sound you would like to play.

Here is my code where I play either the default notification sound or a custom sound depending on the client's settings. The code also takes care of devices running Android prior to API 26:

String sound = PreferenceManager.getDefaultSharedPreferences(getApplicationContext()).getString("NotificationsSound", getString(R.string.settingsNotificationSiren));
Uri soundUri = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://"+ getApplicationContext().getPackageName() + "/" + R.raw.siren);
NotificationManager mNotificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);
NotificationChannel mChannel;
String channel_id = Utils.CHANNEL_DEFAULT_ID;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    if (sound.toLowerCase().equals(getString(R.string.settingsNotificationSiren).toLowerCase())) {
        channel_id = Utils.CHANNEL_SIREN_ID;
        mChannel = new NotificationChannel(Utils.CHANNEL_SIREN_ID, Utils.CHANNEL_SIREN_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);
    } else {
        mChannel = new NotificationChannel(Utils.CHANNEL_DEFAULT_ID, Utils.CHANNEL_DEFAULT_NAME, NotificationManager.IMPORTANCE_HIGH);
        mChannel.setLightColor(Color.GRAY);
        mChannel.enableLights(true);
        mChannel.setDescription(Utils.CHANNEL_DEFAULT_DESCRIPTION);
    }
    if (mNotificationManager != null) {
        mNotificationManager.createNotificationChannel( mChannel );
    }
}

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this, channel_id)
        .setSmallIcon(R.drawable.ic_stat_maps_local_library)
        .setLargeIcon(BitmapFactory.decodeResource(getApplicationContext().getResources(), R.mipmap.ic_launcher))
        .setTicker(title)
        .setContentTitle(contentTitle)
        .setContentText(contentText)
        .setAutoCancel(true)
        .setLights(0xff0000ff, 300, 1000) // blue color
        .setWhen(System.currentTimeMillis())
        .setPriority(NotificationCompat.PRIORITY_DEFAULT);

if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
    if (sound.toLowerCase().equals(getString(R.string.settingsNotificationSiren).toLowerCase())) {
        mBuilder.setSound(soundUri);
    } else {
        mBuilder.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION));
    }
}

int NOTIFICATION_ID = 1; // Causes to update the same notification over and over again.
if (mNotificationManager != null) {
    mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
}