android create notification

1NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(yourContext.getApplicationContext(), "notify_001");
2Intent ii = new Intent(yourContext.getApplicationContext(), YourMainActivty.class);
3PendingIntent pendingIntent = PendingIntent.getActivity(yourContext, 0, ii, 0);
4
5NotificationCompat.BigTextStyle bigText = new NotificationCompat.BigTextStyle();
6bigText.bigText(notificationsTextDetailMode); //detail mode is the "expanded" notification
7bigText.setBigContentTitle(notificationTitleDetailMode);
8bigText.setSummaryText(usuallyAppVersionOrNumberOfNotifications); //small text under notification
9
10mBuilder.setContentIntent(pendingIntent);
11mBuilder.setSmallIcon(R.mipmap.ic_launcher); //notification icon
12mBuilder.setContentTitle(notificationTitle); //main title
13mBuilder.setContentText(notificationText); //main text when you "haven't expanded" the notification yet
14mBuilder.setPriority(Notification.PRIORITY_MAX);
15mBuilder.setStyle(bigText);
16
17NotificationManager mNotificationManager = (NotificationManager) yourContext.getSystemService(Context.NOTIFICATION_SERVICE);
18
19NotificationChannel channel = new NotificationChannel("notify_001",
20                                                      "Channel human readable title",
21                                                      NotificationManager.IMPORTANCE_DEFAULT);
22if (mNotificationManager != null) {
23  mNotificationManager.createNotificationChannel(channel);
24}
25
26if (mNotificationManager != null) {
27  mNotificationManager.notify(0, mBuilder.build());
28}