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Clustering on Google Map V2 Part-1
Introduction:
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.
Screenshots:
Getting Started:
- Download zip from above link and import library project.
- Import this library to project.
Note: No need to import google play service library project as this library contains it. - Get Map key from API Console.
Map Implementation:
- Activity extends FragmentActivity
- FragmentManager fm = getSupportFragmentManager();
- SupportMapFragment f = (SupportMapFragment) fm.findFragmentById(R.id.map); GoogleMap map = f.getExtendedMap();
Cluster Implementatioin:
map.setClustering(new ClusteringSettings().iconDataProvider(new DemoIconProvider(getResources())));
DemoIconProvider.java:
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]);
}
paint.setColor(Color.WHITE);
paint.setTextAlign(Align.CENTER);
paint.setTextSize(resources.getDimension(R.dimen.text_size));
}
@Override
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 - bounds.top;
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
