Sort leaderboard scores

package com.example.game2d;

import static com.example.game2d.MapUtil.sortByValue;

import android.annotation.SuppressLint;

import android.os.Build;

import android.os.Bundle;

import android.util.Log;

import android.widget.LinearLayout;

import android.widget.TextView;

import androidx.annotation.RequiresApi;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Comparator;

import java.util.HashMap;

import java.util.Map;

import java.util.Vector;

public class LeaderboardActivity extends AppCompatActivity {

    private LinearLayout scoreListLayout;

    @SuppressLint("DefaultLocale")

    @RequiresApi(api = Build.VERSION_CODES.N)

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        // Get reference to the LinearLayout that will hold the scores

        scoreListLayout = findViewById(R.id.score_list_layout);

        // Create vectors to store the usernames and scores

        Vector<String> usernames = new Vector<>();

        usernames.add("Alice");

        usernames.add("Bob");

        usernames.add("Charlie");

        usernames.add("Dave");

        Vector<Integer> scores = new Vector<>();

        scores.add(100);

        scores.add(75);

        scores.add(60);

        scores.add(50);

        // Loop through the scores and add them to the layout

        for (int i = 0; i < usernames.size(); i++) {

            String username = usernames.get(i);

            int score = scores.get(i);

            // Create a new TextView to display the score

            TextView scoreView = new TextView(this);

            scoreView.setText(String.format("%s: %d", username, score));

        // Create map to store usernames and scores

        HashMap<String, Integer> scoreMap = new HashMap<String, Integer>();

        scoreMap.put("Bob", 75);

        scoreMap.put("Dave", 50);

        scoreMap.put("Charlie", 60);

        scoreMap.put("Alice", 100);

        // Sort map by values (descending scores)

        HashMap<String, Integer> sortedScoreMap = new HashMap<String, Integer>();

        sortedScoreMap = (HashMap<String, Integer>) sortByValue(scoreMap);

        // Loop through keys (usernames) and add username and score to the layout

        for (String username : sortedScoreMap.keySet()) {

            // Create a textview for the username and score

            TextView scoreView = new TextView(this);

            scoreView.setText(String.format("%s: %d", username, sortedScoreMap.get(username)));

            // Add the TextView to the LinearLayout

            scoreListLayout.addView(scoreView);

        }

package com.example.game2d;

import android.os.Build;

import androidx.annotation.RequiresApi;

import java.util.ArrayList;

import java.util.Collections;

import java.util.LinkedHashMap;

import java.util.List;

import java.util.Map;

// https://stackoverflow.com/questions/109383/sort-a-mapkey-value-by-values

public class MapUtil {

    @RequiresApi(api = Build.VERSION_CODES.N)

    public static <K, V extends Comparable<? super V>> Map<K, V> sortByValue(Map<K, V> map) {

        List<Map.Entry<K, V>> list = new ArrayList<>(map.entrySet());

        list.sort(Collections.reverseOrder(Map.Entry.comparingByValue()));

        Map<K, V> result = new LinkedHashMap<>();

        for (Map.Entry<K, V> entry : list) {

            result.put(entry.getKey(), entry.getValue());

        }

        return result;

    }

}

 No newline at end of file