我已经使用了数据库引用，那么为什么我要将所有用户数据都放入 recyclerview 我只希望一个用户数据进入 recycler 视图？

Question

Below is my current recyler view screenshot...i am getting staydetails all 8 nodes data its ok when i search single user but it also add into list of another user child node staydetails data that i dont want.

My Firebase DataBase Structure is as per below:

I want only single user "staydetails". Instead of that in my recycler Adapter i am getting all user data.

When I am adding multiple user and their room stay details while searching for one user it gives me all user staydetails data into adapter. Here is my MainActivity recycler view with adapter and database refrence. Thank you in Advance

    final String userformno = mobileorformnosearch.getText().toString().trim();
    globalmobileno = userformno;
    if (userformno.trim().length() == 10) {
        list.clear();
        PassDataRef = FirebaseDatabase.getInstance().getReference().child("Passanger");
        PassDataRef.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                for (DataSnapshot datas : dataSnapshot.getChildren()) {


                    if (dataSnapshot.hasChild(userformno)) {
                        // run some code

                        //MobileNoDataWise
                        UserDataRegistration user = dataSnapshot.child(userformno).getValue(UserDataRegistration.class);

                        YatriName.setText(user.getUsername());
                        YatriAge.setText(user.getAge());
                        YatriCity.setText(user.getCity());
                        Yatriphonenumber.setText(user.getMobileno());
                        YatriformNo.setText(user.getFormno());
                        YatriCoachNo.setText(user.getCoachno());
                        YatriSeatNo.setText(user.getSeatno());
                        YatriBearth.setText(user.getBearth());
                        YatriBusno22.setText(user.getBustwono());
                        YatriBusSeatNo22.setText(user.getBustwoseatno());
                        YatriBusno32.setText(user.getBusthreeno());
                        YatriBusSeatNo32.setText(user.getBusthreeseatno());
                        YatriPhotoUri.setText(user.getProfilephoto());
                        YatriGender.setText(user.getGender());
                        YatriMBusno.setText(user.getMbusno());
                        YatriMBusSeatno.setText(user.getMseatno());
                        // String url ="https://firebasestorage.googleapis.com/v0/b/uttammangal-ad8b8.appspot.com/o/profilepic%2F223.jpg?alt=media&token=703bcc8f-c2c3-4beb-bffc-40e52daa572d";// user.getProfilephoto();
                        String Url = user.getProfilephoto();
                        if (Url != null) {

                            Picasso
                                    .get()
                                    .load(Url)
                                    .resize(200, 200) // resizes the image to these dimensions (in pixel)
                                    .centerCrop()
                                    .into(YatriImageView);
                            // Glide.with(getApplicationContext()).load(Url).into(YatriImageView);
                        } else {

                            Toast.makeText(MainActivity.this, "NO Image Found!!", Toast.LENGTH_LONG).show();

                        }

                        RecycleDataRef = FirebaseDatabase.getInstance().getReference("Passanger");
                        list.clear();
                       Query  qry = RecycleDataRef.child(userformno).child("StayDetails");
                        qry.addListenerForSingleValueEvent(new ValueEventListener() {
                            @Override
                            public void onDataChange(@NonNull DataSnapshot dataSnapshot1) {
                                for (DataSnapshot dataSnapshot2 : dataSnapshot1.getChildren()) {
                                    //UserDataRegistration user = dataSnapshot.child(userformno).getValue(UserDataRegistration.class);

                                        UserDataRetrieve u = dataSnapshot2.getValue(UserDataRetrieve.class);
                                        //UserDataRetrieve u = dataSnapshot1.getValue(UserDataRetrieve.class);

                                        list.add(u);

                                }

                                adapter = new MyAdapter(MainActivity.this, list);

                                recyclerView.setAdapter(adapter);
                            }

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

                            }
                        });


                    } else {
                        Toast toast = Toast.makeText(MainActivity.this, "No Record Found!!!!!", Toast.LENGTH_SHORT);
                        toast.setGravity(Gravity.CENTER, 0, 0);
                        toast.show();
                        break;
                    }

                }//ForloopClosing
                return;
            } //Main DataSnapshot Profile Data closing


            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
                Toast.makeText(MainActivity.this, "Please Enter Valid MobileNo!!", Toast.LENGTH_LONG).show();

            }


        }); //addvaluelistner main profile Data Closing

        //} //Query node equals closing


    } else {
        Toast.makeText(MainActivity.this, "Please Enter 10 Digit MobileNo!!", Toast.LENGTH_LONG).show();

    }

} //OnClick Closing

Answer 1

Instead of loop through all users you can simply get the user data that you want through search like below:

FirebaseDatabase.getInstance().getReference().child("Passanger").child(userformno).addListenerForSingleValueEvent(
        new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                UserDataRegistration user = dataSnapshot.getValue(UserDataRegistration.class);

                ...

                if(dataSnapshot.hasChild("StayDetails")) {
                    for (DataSnapshot dataSnapshot2 : dataSnapshot.child("StayDetails").getChildren()) {
                        UserDataRetrieve u = dataSnapshot2.getValue(UserDataRetrieve.class);
                        //UserDataRetrieve u = dataSnapshot1.getValue(UserDataRetrieve.class);
                        list.add(u);
                    }

                   ...

                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
                Toast toast = Toast.makeText(MainActivity.this, "No Record Found!!!!!", Toast.LENGTH_SHORT);
                toast.setGravity(Gravity.CENTER, 0, 0);
                toast.show();
            }
        }
);

Hope this will give you the exact data that you want.