How to display Map in hybrid application?

I am developing a hybrid application using IonicFramework. In my case Google Map is displaying on browser, but it is not displaying in Android device.

I have created Google Map key for browser. so it is working fine in browser. but it is not displaying in android.

So, My Question is -

Do i need to create separate google Map key for android as well?

If yes then, how do we integrate google Map code for both platform?

When using the Google maps Javascript API v3 a key is not even mandatory, so getting another one will not solve your problem.

Can you see what error you are getting? (if you got a device plugged in, go to "other tools" > "inspect devices" and check out the console over there.

Are you just getting a gray screen?