问题
Google maps V2 if i change my api key in developer console in updated version of my android application. what will happen to the previous version of my application on play store. means the previous key will automatically change or my previous version of application will stop to show maps
回答1:
There is no limitation to the number of API keys you can have for Google Maps: if you need one key for an older release, another for a debug key, and another for a new release key, then just create new keys.
回答2:
Showing the Google Maps v2 on android only depends on the package name and the SHA-1 declared in the API key. If the package name of your updated version is the same of your previous one, than you can continue using the Google Maps API and the application will show your maps.
来源：https://stackoverflow.com/questions/29992184/google-maps-v2-if-i-change-my-api-key-in-developer-console-in-updated-version-wh