Android activity-Disable Activity

By calling the finish () method, you can close an activity or call the finishactivity () method to close the independent activity that was previously started.

Note: In most cases, you should not use these methods to close an activity. In the subsequent discussions about the activity lifecycle, you will understand that, the Android system manages the life of each activity for you, so you do not need to close your own activity. Calling these methods will adversely affect the expected user experience. This method should be used only when it is clear that the user does not need to return the instance of this activity.