Finishing current activity from a fragment

Question

I have a fragment in an activity that I am using as a navigation drawer. It contains buttons that when clicked start new activities (startActivity from a fragment simply calls startActivity on the current activity).

For the life of me I can't seem to figure out how I would finish the current activity after starting a new one.

I am looking to achieve something like this in the fragment:

@Override public void onClick(View view) {     // TODO Auto-generated method stub     if (view == mButtonShows) {         Intent intent = new Intent(view.getContext(), MyNewActivity.class);         intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);         startActivity(intent);         finish();     }  } 

But it seems Fragment.class does not implement finish() (like it implements startActivity(...)).

I would like the activity backstack cleared when they launch the 2nd activity. (so pressing back from the new activity would technically drop them back to the launcher)

Answer 1

When working with fragments, instead of using this or refering to the context, always use getActivity(). You should call

Java

getActivity().finish(); 

Kotlin

activity.finish() 

to finish your activity from fragment.

Answer 2

Well actually...

I wouldn't have the Fragment try to finish the Activity. That places too much authority on the Fragment in my opinion. Instead, I would use the guide here: http://developer.android.com/training/basics/fragments/communicating.html

Have the Fragment define an interface which the Activity must implement. Make a call up to the Activity, then let the Activity decide what to do with the information. If the activity wishes to finish itself, then it can.