I'm trying to develop an android application and I need to use GOOGLE MAPS in it. However I dont have an mobile to test it, so I'm using bluestacks. But I always get a grey screen with GOOGLE logo in the bottom left.
So how can I fix it, any help please
This is occurring because you did not get an API_KEY in the Developer's Console. To resolve this, you need to follow the documentation Get a Google Maps Key. You need API keys in order to access Google APIs.