Register Google Map API Key
You need to have a Gmail account, please sign into gmail and then access to the URL:
You need to create a Project on Google Developers Console.
Note: You can create one or more Project for different purposes.
Project name should be named after your company, here I named MyGoogleMap.
Your project is created.
Firstly you need to choose the project, for example, I am standing in the MyGoogleMap project.
If APIs is not enabled, you need to enable it:
Search with the keyword "Map":
Click on "Maps SDK for Android".
Enable "Google Maps Android API".
Google Maps Android API is enabled, but you can't use it in your project until you create credentials. In that case you need to make a credentials.
API Key is created.
Naming your Android API Key is "My Android API Key for Tutorial".