getActionBar().setDisplayHomeAsUpEnabled(true); throws NullPointerException on new activity creation (Google - Basic Tutorial)

Question

I am following this tutorial and getting a NullPointerException at the onCreate method of the DisplayMessageActivity at this block of code:

if (Build.VERSION         


        

Answer 1

You must have set some theme with your Activity which is not compatible with the Action bar.

So just check the theme you are using with in your manifest file and remove it

or if you have defined custom theme go to your res->values->style.xml and make WindowActionBar to true.