Why getApplicationContext() in constructor of Activity throws null pointer exception?

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Just to get a feeling of what’s going on. Activity extends ContextThemeWrapper which extends ContextWrapper from whom Activity inherits getApplicationContext(). ContextWrapper implements it as :

@Override
public Context  getApplicationContext() {
    return mBase.getApplicationContext(); // mBase is a Context
}

The only public constructor of ContextWrapper is :

 public  ContextWrapper(Context base) {
     mBase = base;
 }

in ContextThemeWrapper we have :

 public  ContextThemeWrapper() {
     super(null);
 }

and since Activity does not define an explicit constructor the constructor above is called – mBase == null in Activity’s constructor – boom.

Links from 4.2.2_r1

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