Set Action for home button in android

Question

How I can change working of home button in android? I want to when I click on home button I do some actions and after that application should go to background. How I can do that

Answer 1

I do it this way:

/* Handles item selections */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:    
                    //You can do whatever you want here       
            Intent homeInt = new Intent(this, SomeActivity.class);
            startActivity(homeInt);
            return true;
        }
        return false;
    }