onOptionsItemSelected not called pressing up navigation icon on fragment

Question

Title is almost self explanatory.

Architecture:

• I have Main activity that extends AppCompatActivity.
• Also I have a drawer layout. Each option of this menu opens a fragment.
• Each fragment has its own menu layout by setHasOptionsMenu(true) with its own buttons. The home button of their menus is still an access to open the drawer layout.
• One of the fragments has a list of items and when one of these items is clicked a new child fragment is opened. ( HERE IS THE PROBLEM ) I want this child fragment to be able to navigate up to its parent by clicking on the up icon on its toolbar.

I disable the Drawer Toggle and set the Home As Up indicator just before replace the fragments:

        mDrawerToggle.setDrawerIndicatorEnabled(false);
        drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);

        actionBar.setHomeAsUpIndicator(R.drawable.ic_arrow_back_white_24dp);
        actionBar.setDisplayHomeAsUpEnabled(true);

Then, when the UP icon is clicked, nothing happen. I debugged it and the onOptionsItemSelected method is not called.

FYI, all the other buttons that I added to the menu (search, refresh, etc) work and onOptionsItemSelected is called.

Answer 1

If you're implementing onOptionsItemSelected in the drawer activity, it will no longer be called in the fragment too, unless you return false in the activity.

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.home:
        return false; //The fragment will take care of it
    default:
        break;
    }
return false;
}

Hope it helps!

Update

You can also try starting a new activity and loading that fragment in the activity, as I said. Since you're already passing data through a Bundle to your child fragment, you can do the same for the activity.

Intent intent = new Intent(getActivity(), NewActivity.class);
Bundle bundle = new Bundle();
bundle.putWhatever(key, value); //There's no such method, just a generalization
intent.putExtras(bundle);
startActivity(intent);