Clustering on Google Map V2 Part-1

9:31 PM , 4 Comments


I had done with clustering on Google Map V1. After it is deprecated, i was searching for clustering on Google Map V2. And i found one library Android Maps Extensions. It is working great but depends on your implementation how will you use it in your project.

Drawback : This library use google-play-services.jar and has its own implementation of GoogleMap. Hence if there will any change happen in Map v2 API, takes time to implement that changes in this library.


Getting Started:

  1. Download zip from above link and import library project.
  2. Import this library to project.
    No need to import google play service library project as this library contains it.
  3. Get Map key from API Console.

Map Implementation:

  • Activity extends FragmentActivity
  • FragmentManager fm = getSupportFragmentManager();
  • SupportMapFragment f = (SupportMapFragment) fm.findFragmentById(; GoogleMap map = f.getExtendedMap();

Cluster Implementatioin:

map.setClustering(new ClusteringSettings().iconDataProvider(new DemoIconProvider(getResources())));

public class DemoIconProvider implements IconDataProvider {

 private static final int[] res = { R.drawable.m1, R.drawable.m2, R.drawable.m3, R.drawable.m4, R.drawable.m5 };

 private static final int[] forCounts = { 10, 100, 1000, 10000, Integer.MAX_VALUE };

 private Bitmap[] baseBitmaps;

 private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
 private Rect bounds = new Rect();

 private MarkerOptions markerOptions = new MarkerOptions().anchor(0.5f, 0.5f);

 public DemoIconProvider(Resources resources) {
  baseBitmaps = new Bitmap[res.length];
  for (int i = 0; i < res.length; i++) {
   baseBitmaps[i] = BitmapFactory.decodeResource(resources, res[i]);

 public MarkerOptions getIconData(int markersCount) {
  Bitmap base;
  int i = 0;
  do {
   base = baseBitmaps[i];
  } while (markersCount >= forCounts[i++]);

  Bitmap bitmap = base.copy(Config.ARGB_8888, true);

  String text = String.valueOf(markersCount);
  paint.getTextBounds(text, 0, text.length(), bounds);
  float x = bitmap.getWidth() / 2.0f;
  float y = (bitmap.getHeight() - bounds.height()) / 2.0f -;

  Canvas canvas = new Canvas(bitmap);
  canvas.drawText(text, x, y, paint);

  BitmapDescriptor icon = BitmapDescriptorFactory.fromBitmap(bitmap);
  return markerOptions.icon(icon);

TO overcome from drawback, I found one library Clustering on Google Map V2 Part-2 .
It is easy to implement and more customizable.

Download Source code : ClusterMap2

Reference Link: Android Maps Extensions

Karn Shah

My name is Karn Shah, I am a software developer living in Ahmedabad,India and my job/hobby is Android. I have been working on the Android platform since 2011 and I hope that sharing what I have learned will help people get proficient in Android faster!


  1. Hello Karn,

    I have read this blog, This blog is very helpful for me.
    Keep it up posting new contents.


  2. There is no method like setClustring in Map v2