How to group android notifications like whatsapp?

Question

I don´t know how to group two or more notifications into only one and show a message like "You have two new messages".

Answer 1

Steps to be taken care from the below code.

NotificationCompat.Builder:contains the UI specification and action information NotificationCompat.Builder.build() :used to create notification (Which returns Notification object) Notification.InboxStyle: used to group the notifications belongs to same ID NotificationManager.notify():to issue the notification. 

Use the below code to create notification and group it. Include the function in a button click.

private final int NOTIFICATION_ID = 237; private static int value = 0; Notification.InboxStyle inboxStyle = new Notification.InboxStyle(); Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.push_notify_icon); public void buttonClicked(View v) {         value ++;         if(v.getId() == R.id.btnCreateNotify){             NotificationManager nManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);             Notification.Builder builder = new Notification.Builder(this);                         builder.setContentTitle("Lanes");             builder.setContentText("Notification from Lanes"+value);             builder.setSmallIcon(R.drawable.ic_launcher);             builder.setLargeIcon(bitmap);             builder.setAutoCancel(true);             inboxStyle.setBigContentTitle("Enter Content Text");             inboxStyle.addLine("hi events "+value);             builder.setStyle(inboxStyle);             nManager.notify("App Name",NOTIFICATION_ID,builder.build());         } } 

For separate notifications assign different NOTIFICATION_IDs..