Data Sharing between Fragments and Activity in Android

Many ways :

1) Activity -> Fragment

• In your Activity : create a bundle and use fragment.setArguments(bundle)
• in your Fragment : use Bundle bundle = getArguments()

2) Activity -> Fragment

• In your Fragment : create a public method

• In your Activity : call an active fragment public method :

  getSupportFragmentManager().findFragmentById(R.id.your_fragment).publicMethod(args)

3) Fragment -> Activity

• In your Fragment : create un interface with getter and setter methods (callback methods)
• In your Activity : implement the interface

4) Fragment -> Activity

• In your Activity : Create public getter and setter or other methods

• In your Fragment : called public activity getter, setter or other methods using :

  getActivity().getSomething(), getActivity().setSomething(args) or getActivity().someMethod(args)