Android : how to show full message with android notification

i want to showing full message with android notification but my code just shows part of the message (just in a one row): my sample code is :

         NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
                .setSmallIcon(R.drawable.iconnotify)
                .setContentTitle("New Message")
                .setContentText("Automatic Target Mode: using existing emulator emulator-5554 running compatible AVD test4")
                .setAutoCancel(true)
                .setTicker("Automatic Target Mode: using existing emulator emulator-5554 running compatible AVD test4");
                final int notificationId = 1;
                NotificationManager nm = (NotificationManager) context
                      .getSystemService(Context.NOTIFICATION_SERVICE);
                nm.notify(notificationId, mBuilder.build());

now resuslt

The main objective