Android Error [Attempt to invoke virtual method 'void android.app.ActionBar' on a null object reference]

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误落风尘 2020-11-28 22:13

I have a code module which implements viewpager with navigation drawer, however, when I run the code I get the following error

01-26 09:20:02.958: D/AndroidR


      
      
        
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                   粉色の甜心
                                             
                
                
                (楼主)
            
              
              
                2020-11-28 22:56
              

            
            
                        
If anybody wants to use android.app.ActionBar and android.app.Activity you should change the app theme in styles.xml, for example: