Mercury-IM/app/src/main/java/org/mercury_im/messenger/ui/roster/RosterFragment.java

59 lines
1.8 KiB
Java

package org.mercury_im.messenger.ui.roster;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProviders;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import android.os.Bundle;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import org.mercury_im.messenger.R;
import org.mercury_im.messenger.persistence.room.model.RoomContactModel;
import java.util.ArrayList;
import java.util.List;
/**
* A placeholder fragment containing a simple view.
*/
public class RosterFragment extends Fragment {
private RosterViewModel rosterViewModel;
private RosterRecyclerViewAdapter recyclerViewAdapter;
private RecyclerView recyclerView;
public RosterFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_roster_entry_list, container, false);
recyclerView = view.findViewById(R.id.roster_entry_list__recycler_view);
recyclerViewAdapter = new RosterRecyclerViewAdapter(new ArrayList<>());
recyclerView.setAdapter(recyclerViewAdapter);
rosterViewModel = ViewModelProviders.of(getActivity()).get(RosterViewModel.class);
observeViewModel(rosterViewModel);
return view;
}
private void observeViewModel(RosterViewModel viewModel) {
viewModel.getRosterEntryList().observe(this, new Observer<List<RoomContactModel>>() {
@Override
public void onChanged(@Nullable List<RoomContactModel> rosterEntries) {
if (rosterEntries == null) {
return;
}
recyclerViewAdapter.setItems(rosterEntries);
}
});
}
}