How to create Custom Notification in android

Question

I need to create a custom notification instead of the default notification in android. Current notification have a icon,heading and message like below image

Answer 1

That's called Expanded layouts which is available right from Jelly Bean version.

There are 2 views of Notifications:

1. Normal View
2. Big View

A notification’s big view appears only when the notification is expanded, which happens when the notification is at the top of the notification drawer, or when the user expands the notification with a gesture. Expanded notifications were first introduced in Android 4.1 JellyBean [API 16].

In your case, you just want to display big picture in notification, give Notification.BigPictureStyle a try:

Bitmap remote_picture = null;

// Create the style object with BigPictureStyle subclass.
NotificationCompat.BigPictureStyle notiStyle = new 
        NotificationCompat.BigPictureStyle();
notiStyle.setBigContentTitle("Big Picture Expanded");
notiStyle.setSummaryText("Nice big picture.");

try {
        remote_picture = BitmapFactory.decodeStream(
                (InputStream) new URL(sample_url).getContent());
} catch (IOException e) {
        e.printStackTrace();
}

// Add the big picture to the style.
notiStyle.bigPicture(remote_picture);