Check if back key was pressed in android?

Question

Say I\'m on my main activity and I start a new activity

MainActivity > NewActivity

And from NewActivity I press the back ke

Answer 1

I try the below method to detect the back button pressed on the action bar in activity by the first method and the second one is used to detecting the mobile hardware button back or kill activity button.

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()){
        case android.R.id.home:
            onBackPressed();
            return true;
        default:
            return super.onOptionsItemSelected(item);
    }
}

@Override
public void onBackPressed() {
    setResult(RESULT_CANCELED);
    super.onBackPressed();
}