Draw hollow Polygon on Map, using addHole() method

Example to draw hollow Polygon on Map, on user clicked location.

Refer to Google document to create hollow Polygon. It demonstrate with addHole(LatLng... points), actually I can only found addHole(Iterable<latlng> points) in com.google.android.gms.maps.model.PolygonOptions class! This example demonstrate how to apply Iterable<latlng> on PolygonOptions.

(related: What is Iterable?)

Modify java code from the last exercise of "Draw tranparent circle".

package com.example.androidmapsv2;

import java.util.ArrayList;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapClickListener;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.Circle;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.PolygonOptions;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity 
 implements OnMapClickListener{
 
 final int RQS_GooglePlayServices = 1;
 private GoogleMap myMap;
 
 TextView tvLocInfo;
 
 Circle myCircle;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  tvLocInfo = (TextView)findViewById(R.id.locinfo);
  
  FragmentManager myFragmentManager = getFragmentManager();
  MapFragment myMapFragment 
   = (MapFragment)myFragmentManager.findFragmentById(R.id.map);
  myMap = myMapFragment.getMap();

  myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
  
  myMap.setOnMapClickListener(this);

 }
 
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.activity_main, menu);
  return true;
 }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
     case R.id.menu_legalnotices:
      String LicenseInfo = GooglePlayServicesUtil.getOpenSourceSoftwareLicenseInfo(
        getApplicationContext());
      AlertDialog.Builder LicenseDialog = new AlertDialog.Builder(MainActivity.this);
      LicenseDialog.setTitle("Legal Notices");
      LicenseDialog.setMessage(LicenseInfo);
      LicenseDialog.show();
         return true;
     }
  return super.onOptionsItemSelected(item);
 }

 @Override
 protected void onResume() {

  super.onResume();

  int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
  
  if (resultCode == ConnectionResult.SUCCESS){
   Toast.makeText(getApplicationContext(), 
     "isGooglePlayServicesAvailable SUCCESS", 
     Toast.LENGTH_LONG).show();
  }else{
   GooglePlayServicesUtil.getErrorDialog(resultCode, this, RQS_GooglePlayServices);
  }
  
 }


 @Override
 public void onMapClick(LatLng point) {
  
  //generate points on outter path
  ArrayList<LatLng> outter = new ArrayList<LatLng>();  
  outter.add(new LatLng(point.latitude-5, point.longitude-5)); 
  outter.add(new LatLng(point.latitude-5, point.longitude+5)); 
  outter.add(new LatLng(point.latitude+5, point.longitude+5)); 
  outter.add(new LatLng(point.latitude+5, point.longitude-5));
  
  //generate points on inner path
  ArrayList<LatLng> inner = new ArrayList<LatLng>();  
  inner.add(new LatLng(point.latitude-4, point.longitude-4)); 
  inner.add(new LatLng(point.latitude-4, point.longitude+4)); 
  inner.add(new LatLng(point.latitude+4, point.longitude+4)); 
  inner.add(new LatLng(point.latitude+4, point.longitude-4));
   
  PolygonOptions polygonOptions = 
    new PolygonOptions()
     .addAll(outter)
     .addHole(inner)
     .fillColor(Color.BLUE)
     .strokeWidth(1);

  myMap.addPolygon(polygonOptions);
 }

}

Download the files.

The series:

A simple example using Google Maps Android API v2, step by step.