Android Maps Point Clustering

Question

Is there any code for Point Clustering in android? How can i load thousand pinpoint without having performance issues?

Answer 1

Google's Android Map Utils has a solution for this: Google Maps Android Marker Clustering Utility.

Add dependency

implementation 'com.google.maps.android:android-maps-utils:0.5'

Make your own ClusterItem

class MyItem(
        private val position: LatLng,
        val title: String,
        private val snippet: String
) : ClusterItem {
    override fun getPosition() = position
    override fun getTitle() = title
    override fun getSnippet() = snippet
}

Setting up the cluster manager and adding items

override fun onMapReady(googleMap: GoogleMap) {
    val clusterManager = ClusterManager<MyItem>(this, googleMap)
    googleMap.setOnCameraIdleListener(clusterManager)

    clusterManager.addItem(MyItem(LatLng(51.51, -0.12), "title", "snippet"))
}

That's it! Items are now shown as follows:

Customizing the icon

In order to customize the icon, add val icon: BitmapDescriptor to your ClusterItem and change the renderer of the cluster manager:

    clusterManager.renderer = object : DefaultClusterRenderer<MyItem>(this, googleMap, clusterManager) {
        override fun onBeforeClusterItemRendered(item: MyItem, markerOptions: MarkerOptions) {
            markerOptions.icon(item.icon)
        }
    }

Making items clickable

As a rule of thumb, any interaction with markers should go through the cluster manager instead. The same applies to making items clickable.

    googleMap.setOnMarkerClickListener(clusterManager)
    clusterManager.setOnClusterItemClickListener {
        Toast.makeText(this, "Clicked on item ${it.title}", Toast.LENGTH_SHORT).show()
        true
    }

Similarly, you can call googleMap.setOnInfoWindowClickListener(clusterManager) and clusterManager.setOnClusterItemInfoWindowClickListener to handle clicks on the info window.