Implement a list search from a fragment

There is a MainActivity in which I list the stations into a fragment via TabLayout . And the fragment in turn is used for the tab.

Fragment code:

 public class TabFragment1 extends Fragment implements ItemSendId { private ArrayList<Radio> radioList = new ArrayList<>(); private RecyclerView radioListRecycler; RadiosAdapter mRadioAdapter; DBHeler db; @Override public void onStart() { super.onStart(); db = new DBHeler(getContext()); radioListRecycler = (RecyclerView) getActivity().findViewById(R.id.radioListRecycler); mRadioAdapter = new RadiosAdapter(radioList); mRadioAdapter.setItemSendId(this); radioListRecycler.setLayoutManager(new GridLayoutManager(getContext(), 3)); radioListRecycler.setItemAnimator(new DefaultItemAnimator()); radioListRecycler.setAdapter(mRadioAdapter); prepareRadioData(); } @Override public void sendItemId(int id) { Intent intent = new Intent(getContext(), PlayerActivity.class); intent.putExtra("id", id); startActivity(intent); } private void search(SearchView searchView) { searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String query) { return false; } @Override public boolean onQueryTextChange(String newText) { if (mRadioAdapter != null) mRadioAdapter.getFilter().filter(newText); return true; } }); } private void prepareRadioData() { //заполняем коллекцию } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.tab_fragment_1, container, false); } } 

In MainActivity before I redid the application using TabLayout , the search worked. Now I have a problem. In menu.xml posted component SearchView .

Menu code from MainActivity :

 @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); MenuItem search = menu.findItem(R.id.search); SearchView searchView = (SearchView) MenuItemCompat.getActionView(search); search(searchView); return true; } 

How to access the MainActivity variable from the mRadioAdapter , which is also used in the search method of the TabFragment1 fragment.

If it is not clearly described, then this is what I now have and what I need to get:

There are tabbed activations. The first tab displays the radio station. All code for outputting stations is implemented in TabFragment1.java . Now you need to click on the search in the MainActivity menu to search for stations. Everything worked before all the fragment code was in the MainActivity , but after transferring it to the fragment I don’t know how to access the adapter from the activation.