Develop Environment: Android Studio IDE 4.0.1, Android SDK v30, Google Map API
Google key
You will need to register a person Key for Google Map API for this project, go to API Console https://support.google.com/googleapi/answer/6158862?hl=en. And then Use your API key as the value for google_maps_key in the google_maps_api.xml file under the res/values directory. Mine is hidden here.