Question

以下是我的数据库结构

我在活动中创建了一个recyclerView，以显示用户所做的所有预订。 Recycler View工作正常，但问题是它显示了每个用户所做的预订的所有细节。我想只显示当前登录用户所做的预订。下面是主要活动

public class ViewBooking extends Fragment {

FirebaseDatabase mdatabase;
DatabaseReference refbooking;

RecyclerView recycler_booking;
RecyclerView.LayoutManager layoutManager;
FirebaseRecyclerAdapter<Booking, BookingViewHolder> madpter;

String userEmail;
FirebaseUser user;

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View v= inflater.inflate(R.layout.view_booking, null);

    mdatabase=FirebaseDatabase.getInstance();
    user= FirebaseAuth.getInstance().getCurrentUser();
    userEmail = user.getEmail();

    recycler_booking=(RecyclerView)v.findViewById(R.id.BookingRecyclerView);
    recycler_booking.setHasFixedSize(true);
    layoutManager = new LinearLayoutManager(getActivity());
    recycler_booking.setLayoutManager(layoutManager);

    onStart();

    return v;
}

@Override
public void onStart() {
    super.onStart();

    Query query = mdatabase.getReference("Bookings").orderByChild("userEmail").equalTo(userEmail);
    madpter = new FirebaseRecyclerAdapter<Booking, BookingViewHolder>(Booking.class, R.layout.viewbooking_layout, BookingViewHolder.class, query) {
        @Override
        protected void populateViewHolder(BookingViewHolder viewHolder, Booking model, int position) {
            viewHolder.bookedplace.setText(model.getNameOfPlace());
            viewHolder.bookedplace.setText(model.getNameOfPlace());
            viewHolder.bookedslot.setText(model.getSlotnumber());
            viewHolder.bookeddate.setText(model.getCurrentDate());
            viewHolder.bookedduration.setText(model.getDuration());
            viewHolder.bookedstarttime.setText(model.getStartTime());

        }

    };
    recycler_booking.setAdapter(madpter);
}

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    getActivity().setTitle("View Booking");
}
}

我创建了一个String userEmail，通过Auth

获取当前用户的电子邮件ID

代码在没有查询的情况下工作正常，并显示所有预订。但添加查询后，回收站视图上没有显示任何内容

Answer 1

你缺少听众：

@Override
public void onStart() {
    super.onStart();
    madpter.startListening();
}

@Override
public void onStop() {
    super.onStop();
    madpter.stopListening();
}

如何获取当前用户并在RecyclerView上显示其信息？

1 个答案: