public Entreprisesfrag() {
    // Required empty public constructor
}
@Override
public void onCreate( Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setHasOptionsMenu(true);



}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_entreprises, container, false);

    final ListView listView = view.findViewById(R.id.list);
    final ArrayList<String> arrayList = new ArrayList<>();
    DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference();

    final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1, arrayList);
    listView.setAdapter(arrayAdapter);

    databaseReference.addChildEventListener(new ChildEventListener() {
        @Override
        public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {

String string = dataSnapshot.getValue(String.class);
            arrayList.add(string);
            arrayAdapter.notifyDataSetChanged();

        }

        @Override
        public void onChildChanged(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {

        }

        @Override
        public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {

        }

        @Override
        public void onChildMoved(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {

        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {

        }
    });
    return view;
}


    @Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    super.onCreateOptionsMenu(menu, inflater);
    menu.clear();
    inflater.inflate(R.menu.recherche_activity_menu_item, menu);
    MenuItem item = menu.findItem(R.id.action_search);
    SearchView searchView = (SearchView) item.getActionView();
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            return false;
        }
        @Override
        public boolean onQueryTextChange(String newText) {
            //Do search code here
            return true;
        }
    });

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    if (item.getItemId()==R.id.recherche)
    {

    }
    else if (item.getItemId()==R.id.filtrer)
    {

        Toast.makeText(getContext(), "Erreur de connexion ! Vérifiez l'adresse email utilisée et le mot de passe", Toast.LENGTH_SHORT).show();
    }
    return super.onOptionsItemSelected(item);
}