Activity calling other activities on Android sequence

Question

How can I save and remember the activity that got launched by a specific activity? Say I have activity 1 which launches activity 2 using startActivityForResult(). Then I see the following sequence of calls:

       onPause called from Activity1!
       onSaveInstanceState called from Activity1
       onActivityResult called from Activity1 

Later when I hit the back button to go back to Activity1 from Activity2, I see the onRestart called:

       onRestart called from Activity1
       onResume called from Activity1

So my question now is how do I identify that the transition is from Activity2 -> Activity1 rather than (say) Activity3 -> Activity1?

Answer 1

One possible way is to use startActivityFprResult instead. When you finish any of your other Activities (in this case Activity2 or Activity3), you call setResult(RESULT_OK, intent) and provide an Intent. This will be delivered to Activity1 in onActivityResult, and you can just put some extra in the Intent to identify which Activity just finished.