Firstly, create /res/value/google_maps_api.xml and add API key. For more information of how to create the API key, follow the directions here: https://developers.google.com/maps/documentation/android/start#get-key
<resources>
<string name="google_maps_api_key"
templateMergeStrategy="preserve"
translatable="false">AIza****************************</string>
</resources>
Secondly, create /apikey.properties and add the required secrets as shown below.
AZURE_EVENT_HUB_CONNECTION_STRING="..."
AZURE_EVENT_HUB_NAME="..."
For securing safety API key add google_maps_api.xml and apikey.properties to .gitignore.