Refresh a fragment list from activity

If you want to call any method of Fragment from your activity then you need to implement INTERFACE. So now I am going to introduce Interface example to Refresh a fragment list from an activity of all any method.

MainActivity File:

public class MainActivity extends Activity {

    private FragmentRefreshListener fragmentRefreshListener;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        Button action_btn = (Button)findViewById(R.id.action);

        action_btn .setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if(getFragmentRefreshListener()!= null){
                    getFragmentRefreshListener().onRefresh();
                }
            }
        });


    }

    public FragmentRefreshListener getFragmentRefreshListener() {
        return fragmentRefreshListener;
    }

    public void setFragmentRefreshListener(FragmentRefreshListener fragmentRefreshListener) {
        this.fragmentRefreshListener = fragmentRefreshListener;
    }

    public interface FragmentRefreshListener{
        void onRefresh();
    }

}

Fragment File:

For doing something in your Fragment, you need to add these lines in your onCreateView() method of a fragment.

((MainActivity)getActivity()).setFragmentRefreshListener(new MainActivity.FragmentRefreshListener() {
            @Override
            public void onRefresh() {
               // your method
            }
        });

Now, you need to create a Fragment like this:

public class MyFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        ((MainActivity)getActivity()).setFragmentRefreshListener(new MainActivity.FragmentRefreshListener() {
            @Override
            public void onRefresh() {
                myToast();
            }
        });

        return inflater.inflate(R.layout.fragment_advance_search, container, false);
    }

    public void myToast() {
        Toast.makeText(context, "This is called from MainActivity", Toast.LENGTH_SHORT).show();
    }
}