Alert Dialog Box in Android

HELLO friends now we create a Alert Dialog Box in Android.

• Alert Dialog Box is like a Popup window that confirm the user can do it or not.

•  The code is placed in MainActivity.java file and create a onBackPressed() fun. and put into it.  

• In this finish() function is used to close that Activity in which you apply that function.

• Now you are able to create Your Own Alert Dialog Box in Android App.