How to come back to the last fragment from activity?

Question

I have lots of Fragments and two activities one is main activity that holds every fragments. When i am going to second activity from any fragment its work fine but after that i am pressing back button for come back to my last added fragment in this case i come to home screen . I must have the second activity I can't replace that by fragment.How to come back to the last fragment from activity?

In one more case i must have go to the browser and at browser by pressing back button app directly goes to home screen so how to prevent this ?

Answer 1

When you back pressed from second activity then onResume() of first activity will be called.So you have manage it from onResume(),check last fragment in back stack and move to that fragment.

So you have to use this code in your onResume() of first activity

FragmentManager manager = getSupportFragmentManager();
int count = manager.getBackStackEntryCount();
if(count>0){
  Fragment  mfragment = manager.getBackStackEntryAt(count-1);
  FragmentTransaction ft = fragmentManager.beginTransaction();
  ft.replace(R.id.content_frame, mFragment);
  ft.commit();
}

Answer 2

Try to Use addToBackStack("YourFragment");

http://developer.android.com/reference/android/app/FragmentTransaction.html#addToBackStack(java.lang.String)

Answer 3

you can use:

getSupportFragmentManager().popBackStack();