How to hide current user from FirebaseRecyclerAdapter of all users?

Question

Currently, it pulls in all users details and populates their image, name, and bio. I want it to hide the current user from the list of users and I don't know how to implement the code for it.

I have tried if/while statements to compare dataSnapshot to the current user but I don't know how to populate the users depending on this condition.

public class SearchFragment extends Fragment {
    private RecyclerView usersList;
    private DatabaseReference databaseReference;
    private DatabaseReference userDatabase;
    private DatabaseReference checkName;
    private FirebaseAuth firebaseAuth;
    private String currentUserID;
    private View view;

    public SearchFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        view =  inflater.inflate(R.layout.fragment_search, container, false);
        usersList = view.findViewById(R.id.search_users);
        firebaseAuth = FirebaseAuth.getInstance();
        currentUserID = firebaseAuth.getCurrentUser().getUid();
        databaseReference = FirebaseDatabase.getInstance().getReference().child("Users");
        userDatabase = FirebaseDatabase.getInstance().getReference();
        checkName = userDatabase.child("Users").child(currentUserID).child("name");
        usersList.setHasFixedSize(true);
        usersList.setLayoutManager(new LinearLayoutManager(getContext()));

        return view;
    }

    @Override
    public void onStart() {
        super.onStart();
        final FirebaseRecyclerOptions<Users> options = new FirebaseRecyclerOptions.Builder<Users>()
                .setQuery(databaseReference, Users.class)
                .build();

        FirebaseRecyclerAdapter adapter = new FirebaseRecyclerAdapter<Users, SearchFragment.UsersViewHolder>(options) {
            @Override
            protected void onBindViewHolder(@NonNull SearchFragment.UsersViewHolder holder, int position, @NonNull final Users users) {
                 holder.setName(users.getName());
                 holder.setCity(users.getCity());
                 holder.setImage(users.getImage());

                final String user_ID = getRef(position).getKey();
                final String user_Name = users.getName();
                final String user_Img = users.getImage();

                holder.mView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {

                        CharSequence pickOption[] = new CharSequence[]{"View Profile", "Send Message"};

                        final AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
                        builder.setTitle("Select an Option");
                        builder.setItems(pickOption, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                if (i == 0){
                                    Intent otherProfileIntent = new Intent(getActivity(), OthersProfileActivity.class);
                                    otherProfileIntent.putExtra("user_ID", user_ID);
                                    otherProfileIntent.putExtra("user_Name", user_Name);
                                    otherProfileIntent.putExtra("user_Img", user_Img);
                                    startActivity(otherProfileIntent);
                                }

                                if (i == 1) {
                                    Intent messageIntent = new Intent(getActivity(), MessageActivity.class);
                                    messageIntent.putExtra("user_ID", user_ID);
                                    messageIntent.putExtra("user_Name", user_Name);
                                    messageIntent.putExtra("user_Img", user_Img);
                                    startActivity(messageIntent);
                                }
                            }
                        });

                        builder.show();
                    }
                });
            }

            @NonNull
            @Override
            public SearchFragment.UsersViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
                View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.users_layout, parent, false);
                return new SearchFragment.UsersViewHolder(view);
            }
        };

        usersList.setAdapter(adapter);
        adapter.startListening();
    }

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

    public static class UsersViewHolder extends RecyclerView.ViewHolder {
        View mView;

        public UsersViewHolder(View itemView) {
            super(itemView);
            mView = itemView;
        }

        public void setName(String name) {
            TextView userNameView = mView.findViewById(R.id.single_userName);
            userNameView.setText(name);
        }

        public void setCity(String name) {
            TextView userNameView = mView.findViewById(R.id.single_userStatus);
            userNameView.setText(name);
        }

        public void setImage(String image) {
            CircleImageView userImage = mView.findViewById(R.id.single_userImg);
            if(!image.equals("default")) {
                Picasso.get().load(image).into(userImage);
            }
        }
    }
}

I am expecting the current user to be hidden from the list of all users in the RecyclerView. Thanks in advance!

To understand better, you want to get all users that exist inside your `Users` node except one, the current authenticated user, right? — Alex Mamo, Apr 25 '19 at 08:58
That's correct, i just need to display all other users except the current autenticated user. — LowKeyLo, Apr 25 '19 at 10:31
Thanks for pointing me in the right direction Alex, i'll try and implement it. — LowKeyLo, Apr 25 '19 at 10:42

Reaz Murshed · Answer 1 · 2019-04-24T20:34:41.080

0

You might consider modifying your databaseReference like the following.

databaseReference = FirebaseDatabase.getInstance().getReference().child("Users");
checkName = userDatabase.child("Users").child(currentUserID).child("name");

// This is your updated database reference
databaseReference = FirebaseDatabase.getInstance().getReference()
        .child("Users").child(currentUserID);

Now while setting the options for your FirebaseRecyclerAdapter you might consider setting the query like the following.

final FirebaseRecyclerOptions<Users> options = new FirebaseRecyclerOptions.Builder<Users>()
    .setQuery(databaseReference.equalTo(null), Users.class)
    .build();

I have not tested this. However, please let me know if that works.

edited Apr 24 '19 at 20:34

answered Apr 24 '19 at 19:46

Reaz Murshed

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thanks for the quick reply, the problem is with holder.setName(user.getName()); holder.setCity(user.getCity()); holder.setImage(user.getImage()); being called, it has no way of differenciating between which users to populate, i need a condition before it to say dont populate the recycler view with the current users info, only populate others. – LowKeyLo Apr 24 '19 at 20:12
Sorry, I did not get it. I see that you have a `currentUserID` in your code and I suppose this is the current user that you want to exclude from your `RecyclerView`. Hence, I suggest modifying the database query so that it gives you the other users except for the one with `currentUserID`. Please let me know if that makes any sense. – Reaz Murshed Apr 24 '19 at 20:15
Getting This Error Incompatible types. Required: com.google.firebase.database.DatabaseReference Found: com.google.firebase.database.Query – LowKeyLo Apr 24 '19 at 20:19
Can you please try with the updated code now? – Reaz Murshed Apr 24 '19 at 20:25
no luck getting the same error, is there way to hide the current user from the recycler view? – LowKeyLo Apr 24 '19 at 20:28
Can you please try now? It should remove the incompatible type error. – Reaz Murshed Apr 24 '19 at 20:34
i have got it partiatlly to work with this if(user_ID == checkID){ holder.setIsRecyclable(false); holder.mView.setVisibility(View.GONE); return; } where checkid is current id but it still leaves a gap in the recycler view – LowKeyLo Apr 24 '19 at 20:55
So you could not filter out the current user from the database query... – Reaz Murshed Apr 24 '19 at 21:25
it can, it removes the visibility of the user item after its created, but since its doing that it leaves a gap of where the item used to be, the placeholder is left behind – LowKeyLo Apr 24 '19 at 21:58

How to hide current user from FirebaseRecyclerAdapter of all users?

1 Answers1