Attempt To Invoke Virtual Method 'android.content.sharedpreferences Android.content.context.getsharedpreferences

I'm trying to save Json object which I got from Json URL to favorite list using SharedPreferences but The app crashes every time when I try to save Json Array with next error: 06-2

Solution 1:

You never initialize your member variable activity, so you end up passing a null value for Context to addFavorite() - remove activity entirely and use MainActivity.this (which is a reference to the Activity you are currently in).