Update selected state of navigation drawer after back press

Question

Whats the proper way to handle the selected state of the navigation drawer after back press?

I have a navigation drawer with n entries (in a listview) like the SDK sampl

Answer 1

This is late but for those who are using navigation menu instead of list, here is how i did it

@SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
       int position=0;
       Fragment fragment;
        int id = item.getItemId();
        if (id == R.id.nav_home) {
            fragment=new HomeFragment();
            position=0;

        } else if (id == R.id.nav_profile) {

           fragment=new ProfileFragment();
            position=1;
        }  else if (id == R.id.nav_settings) {
             fragment=new SettingsFragment();
            position=2;
        }

          getSupportFragmentManager()
            .beginTransaction()
            .add(R.id.relative_container, fragment)
            .addToBackStack(""+position)
            .commit();

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }

and add listner for backstack

 getSupportFragmentManager().addOnBackStackChangedListener(new FragmentManager.OnBackStackChangedListener() {
        @Override
        public void onBackStackChanged() {

             FragmentManager fm = getSupportFragmentManager();
             String name = fm.getBackStackEntryAt(fm.getBackStackEntryCount()-1).getName();
               if(!TextUtils.isEmpty(name))
             selectNavigationDrawerItem(Integer.parseInt(name));

        }
    });

selectNavigationDrawerItem method

 private void selectNavigationDrawerItem(int position){

               if(position==0){
                   navigationView.setCheckedItem(R.id.nav_home);
               }
               else if(position==1){
                   navigationView.setCheckedItem(R.id.nav_profile);
               }
               else if(position==2){
                   navigationView.setCheckedItem(R.id.nav_settings);   
              }

     }