Back button and refreshing previous activity

Question

If we have two activities:

1. List of files and last modified time
2. File editing activity

A user selects a file from the list and is taken

Answer 1

I think onRestart() works better for this.

@Override
public void onRestart() { 
    super.onRestart();
    //When BACK BUTTON is pressed, the activity on the stack is restarted
    //Do what you want on the refresh procedure here
}

You could code what you want to do when the Activity is restarted (called again from the event 'back button pressed') inside onRestart().

For example, if you want to do the same thing you do in onCreate(), paste the code in onRestart() (eg. reconstructing the UI with the updated values).