How to create Activity in an application.

How to create Activity in an application.

To create an activity following things should be considered.

• We need to create a subclass of Activity .
• In our subclass ,we need to implement various call back method to manage the various state of lifecycle such as for stopped,resumed,created,destroyed.
• Two important call back methods are oncreate() and onpause()
• oncreate()- the system call this method when you create your activity.you needs to call thesetcontentview() to define the  layout of user interface.