This is a simple demo that shows how to handle large number of markers by using utils library, clustering. There are two modules:

• app: Kotlin implementation
• java: Java implementation

A thorough explanation can be found in the post here.
NOTE: In order to use this code, you need to create an API key for Google Maps from https://console.developers.google.com. Once you generate the key, you need to add it in google_maps_api_key.xml located res -> values