Code example for GoogleMap

Methods: addMarker, addPolygon

			gps1.setLatitude(point.latitude); gps1.setLongitude(point.longitude);
		// If an area is selected, draw the rectangle 
		else { 
			// Get boundaries of the screen from the projection 
			VisibleRegion bounds = map.getProjection().getVisibleRegion();
			drawRect(bounds.farLeft, bounds.farRight, bounds.nearRight, bounds.nearLeft);
		// Show a toast 
        Toast.makeText(this, "Location updated", Toast.LENGTH_SHORT).show();
	private void drawRect(LatLng c1, LatLng c2, LatLng c3, LatLng c4) {
		// Remove previously drawn rect 
		if (rect != null) rect.remove();
		// Add rectangle to the map 
		rect = map.addPolygon(new PolygonOptions()
		    .add(c1,c2,c3,c4) // 4 corners, ccw
		// Set coordinates that will be passed back to the group creation activity 
		gps1.setLatitude(c1.latitude); gps1.setLongitude(c1.longitude);
		gps2.setLatitude(c3.latitude); gps2.setLongitude(c3.longitude);
		// Top left marker 
		if (m1 != null) m1.remove();
		m1 = map.addMarker(new MarkerOptions()
		// Top right marker 
		if (m2 != null) m2.remove();