What is the basic area that I should test it For Android Applications?

Some Basic Field that you should test  for your android application like:-

1.Your Application should run as per as requirement.

2. Different screen Resolution

3. Different Android API Version 

4.If Your application is online mode application then it should compatible  different network like(4G/3G/2G)

5. Interrupt testing(Like MSG coming,call, battery low,network out of reach) 

etc

there are lot of testing depends upon your app or your app functionality .