How to declare global variables in Android?

Question

I am creating an application which requires login. I created the main and the login activity.

In the main activity onCreate method I added the following

Answer 1

DO N'T Use another tag in manifest file.Just do one change in existing tag , add this line android:name=".ApplicationName" where, ApplicationName will be name of your subclass(use to store global) that, you is about to create.

so, finally your ONE AND ONLY tag in manifest file should look like this :-