android actionbar code example

Example 1: android java display icon in action bar

ActionBar actionBar = getActionBar();
actionBar.setSubtitle("mytest");
actionBar.setTitle("vogella.com");

Example 2: sethomebutton listener android

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == android.R.id.home) {
        onBackPressed();  return true;
    }

    return super.onOptionsItemSelected(item);
}