android - Cannot resolve method getActivity()

Question

• I am new to Android and learning to create fragments in Android by following this
  example: Fragment Navigation Drawer

• The code between Navigating between Menu Items and Add Navigation Header consists a method getActivity().

• As the author didn't mentioned where to paste this code, I pasted in my MainActivity.java file

• Is code between Navigating between Menu Items and Add Navigation Header pasted at correct location by me?

• In method selectDrawerItem(MenuItem menuItem) there is a comment // Create a new fragment and specify the planet to show based on position
  Does author expects me to add something over here.

• The project files layout created by me on AndroidStudio is as follow:AndroidStudio Snapshot

Answer 1

You can use:

this Or `MainActivity.this`

Instead of:

getActivity()