Proper way to handle action bar up button?

Question

I use ActionBarSherlock (although I don\'t think it matters).

I have a Main activity and an About activity. I want the About activity to show the back-arrow by its l

Answer 1

For who want to just go back in the previous activity, this is the simplest solution:

public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            finish(); //this method close current activity and return to previous
            return true;
    }
    return super.onOptionsItemSelected(item);
}