Say you have an Android app with multiple activities (or "screens", if you prefer...) and you want to have the same options menu appear on every activity.
Simply create another activity that implements the onCreateOptionsMenu() and onOptionsItemSelected() methods, like this:
public class MasterActivity extends Activity {
@Override
public boolean onCreateOptionsMenu(Menu menu) {
... whatever ...
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
... whatever ...
}
}
Then have all of your other classes (activities) extend your MasterActivity class:
public class MyClass extends MasterActivity {
...
}