Android design support navigation header mark item

Question

how can I mark an item (darker background) in the design support navigation drawer? I am setting the first fragment in the list (the on you first see when opening the app) in the onCreate option right after I initialize the navigation drawer like this: getSupportFragmentManager().beginTransaction().replace(R.id.frame_container, getMapFragment()).commit();

Answer 1

In your menu callback, make sure to call menuItem.setChecked(true), ie:

// From NavigationView.OnNavigationItemSelectedListener
public boolean onNavigationItemSelected(MenuItem menuItem)
{
    menuItem.setChecked(true);
    // TODO Do something with your menuItem
}

You can also do it in your menu XML with android:checked="true" on the appropriate menu.