Cannot query current user's friend list and add to listview android with parse

Question

I've tried to to query of current user's friend list and add it to listview in android. The problem is the method keep showing errors

This is my code

package com.example.krisanapongpoonsawat.chatit;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import com.parse.FindCallback;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import com.parse.FindCallback;
import com.parse.Parse;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;
import com.parse.ParseRelation;
import com.parse.ParseUser;

import java.util.ArrayList;
import java.util.List;

public class User extends AppCompatActivity {
    private ArrayList<ParseUser> uList;

    /** The user. */
    public static ParseUser user;
    ArrayList<String> friendlist;
    ArrayAdapter<String> listAdapter;
    ListView list;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.user);
        Toolbar myToolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(myToolbar);
        final ParseUser currentUser = ParseUser.getCurrentUser();
        list = (ListView) findViewById(R.id.listView);
        listAdapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1);
        list.setAdapter(listAdapter);

    }
    @Override
    protected void onResume()
    {
        super.onResume();
        loadUserList();

    }
    private void loadUserList()
    {
        ParseQuery query = new ParseQuery("Friends");
        query.whereEqualTo("owner", ParseUser.getCurrentUser().getObjectId().toString());
        query.findInBackground(new FindCallback() {
            public void done(List<ParseObject> friendList, ParseException e) {
                if (e == null) {
                    Log.d("score", "Retrieved " + friendList.size() + " scores");
                    for (int i = 0; i < friendlist.size(); i++) {
                        Object object = friendlist.get(i);
                        String name = ((ParseObject) object).getObjectId().toString();
                        listAdapter.add(name);


                    }
                } else {
                    Log.d("score", "Error: " + e.getMessage());
                }
            }
        });


    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu, menu);
        return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_favorite:
                // User chose the "Settings" item, show the app settings UI...
                Intent intent = new Intent(User.this, Search.class);
                startActivity(intent);
                finish();
                return true;

            default:
                // If we got here, the user's action was not recognized.
                // Invoke the superclass to handle it.
                return super.onOptionsItemSelected(item);

        }
    }




}

and the error shown is

    Error:(66, 51) error: <anonymous com.example.krisanapongpoonsawat.chatit.User$1> is not abstract and does not override abstract method done(List,ParseException) in FindCallback
Error:(67, 25) error: name clash: done(List<ParseObject>,ParseException) in <anonymous com.example.krisanapongpoonsawat.chatit.User$1> and done(List<T>,ParseException) in FindCallback have the same erasure, yet neither overrides the other
where T is a type-variable:
T extends ParseObject declared in interface FindCallback

Can you solve this? I've been stuck with it for 3 days now

let me know if you need any additional info!

Thank you

Answer 1

Here you have a lot of informations about relations

Reffering to this documentation and our conversation in comments, I think your query should look like that:

ParseQuery<ParseObject> query = ParseQuery.getQuery("_User");
query.whereEqualTo("owner", ParseUser.getCurrentUser().getObjectId().toString());
query.findInBackground(new FindCallback<ParseObject>() {
    public void done(List<ParseObject> friendList, ParseException e) {
        if (e == null) {
            Log.d("score", "Retrieved " + friendList.size() + " scores");
            for (int i = 0; i < friendList.size(); i++) {
                ParseObject item = friendList.get(i);
                ParseRelation<ParseObject> friendRelation = item.getRelation("Friends");
                ParseQuery friendsQuery = friendRelation.getQuery();
                findFriends(friendsQuery);
            }
         } else {
            Log.d("score", "Error: " + e.getMessage());
         }
    }
});

...

private void findFriends(ParseQuery query) {

    query.findInBackground(new FindCallback() {

        ...

    });

}

It is very likely that something in my answer may not work, but I have no other idea.