Hi Deepak 

Thank you for your support:)

But if I do not call Activity A onbackpress of B then if just finishes the 
App I mean App gets closed.

MyCode

 onClick(..) { 

  start activity B
 }
}class B : Activity {
 onBackPressed() {
  this.finish();

Any help would be appreciated:)
Thanks in advance

On Sunday, July 20, 2014 9:42:50 PM UTC+5:30, Deepak wrote:
>
> Have you overridden onBackPressed in activity B in which case you should 
> call this.finish() in B. Your code should look similar to this
> class A : Activity {
>  onClick(..) { 
>   start activity B
>  }
> }
>
> class B : Activity {
>  onBackPressed() {
>   this.finish(); /* this takes you back to the previous activity on stack. 
> You need not do start activity to go to A as it will create new activity A 
> and launch it instead of closing B and going to previous A.*/
>  }
> }
>

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