Adding location to MapFragment

I am using Reverse Geocoding to get the location, after that, I am placing a marker in the location.

This code adds a location to the MapFragment:

public class AddressMapFragment extends MapFragment {
 
 LatLng location;
 
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
 }
 
 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
   Bundle savedInstanceState) {
  View v =  super.onCreateView(inflater, container, savedInstanceState);
  
  Bundle args = getArguments();
  
  if(args!=null){
   String fulladdress = args.getString("fulladdress");
   new ReverseGeocoding().execute(fulladdress);
  }
  
  
  
  return v;
 }
 
 private void initMap(){
     UiSettings settings = getMap().getUiSettings();
     settings.setAllGesturesEnabled(false);
     settings.setMyLocationButtonEnabled(false);
     
     if(location!=null){

      getMap().moveCamera(CameraUpdateFactory.newLatLngZoom(location,16));
      getMap().addMarker(new MarkerOptions().position(location));
     }
 }
 
 public class ReverseGeocoding extends AsyncTask<String, Void, Void>{

  @Override
  protected Void doInBackground(String... params) {
   reverse_geocoding(params[0]);
   return null;
  }
  
  @Override
  protected void onPostExecute(Void result) {
   super.onPostExecute(result);
   
   initMap();
   
  }
  
 }
 
 public void reverse_geocoding(String fulladdress){
  
  Geocoder geo = new Geocoder(getActivity());
  try {
   List<Address> addresses = geo.getFromLocationName(fulladdress, 1);
   if(addresses.size()>0){
    Address address = addresses.get(0); 
    location = new LatLng(address.getLatitude(),address.getLongitude());
   }
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

}

Back to previous fragment with back button

To be able to go back to the previous fragment pressing the back hardware button we have to add the fragment adding null to the backstack.

This is the resultant code:

Fragment fragment = new Fragment();
  
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().add(R.id.content_frame, fragment).addToBackStack(null).commit();
 

Android Alphabet ListView like Contacts

I've found this page for making a Custom Contact ListView
Android Alphabet ListView like Contacts
Thanks!