Notifications fail to display in Android Oreo (API 26)

Question

I get this message when trying to display a notification on Android O.

Use of stream types is deprecated for operations other than volume control

Answer 1

In Android O it's a must to use a NotificationChannel and NotificationCompat.Builder is deprecated (reference).

Below is a sample code :

NotificationCompat.Builder mBuilder =
        new NotificationCompat.Builder(mContext.getApplicationContext(), "notify_001");
Intent ii = new Intent(mContext.getApplicationContext(), RootActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0, ii, 0);

NotificationCompat.BigTextStyle bigText = new NotificationCompat.BigTextStyle();
bigText.bigText(verseurl);
bigText.setBigContentTitle("Today's Bible Verse");
bigText.setSummaryText("Text in detail");

mBuilder.setContentIntent(pendingIntent);
mBuilder.setSmallIcon(R.mipmap.ic_launcher_round);
mBuilder.setContentTitle("Your Title");
mBuilder.setContentText("Your text");
mBuilder.setPriority(Notification.PRIORITY_MAX);
mBuilder.setStyle(bigText);

NotificationManager mNotificationManager =
        (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);


if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    NotificationChannel channel = new NotificationChannel("notify_001",
            "Channel human readable title",
            NotificationManager.IMPORTANCE_DEFAULT);
    mNotificationManager.createNotificationChannel(channel);
}

mNotificationManager.notify(0, mBuilder.build());