Firebase Sorting Score from Highest to Lowest ~ Android
<p>Inside <code>MainActivity</code>, I have this function:</p>

<pre><code> public void sortingData() {

    mRootRef = new Firebase("https://fyp-1-43a27.firebaseio.com/User");
    dbSortAllData = FirebaseDatabase.getInstance().getReference();

    ListView mLvScore = (ListView) findViewById(R.id.lvScore);

    final List&lt;UserInformation&gt; listScore = new LinkedList&lt;&gt;();
    final ArrayAdapter&lt;UserInformation&gt; adapter
            = new ArrayAdapter&lt;UserInformation&gt;
            (this, R.layout.scoreboard_row, listScore) {

        @NonNull
        @Override
        public View getView(int position, View view, ViewGroup parent) {
            if (view == null) {
                view = getLayoutInflater().inflate(R.layout.scoreboard_row, parent, false);
            }

            UserInformation item = listScore.get(position);
            ((TextView) view.findViewById(R.id.tvScoreName)).setText(item.getName());
            ((TextView) view.findViewById(R.id.tvScorePoint)).setText(item.getScore());
            return view;
        }
    };
    mLvScore.setAdapter(adapter);

    com.firebase.client.Query queryRef = mRootRef.orderByChild("score").startAt("score").endAt("score").limitToFirst(50);
    queryRef.addChildEventListener(new com.firebase.client.ChildEventListener() {
        @Override
        public void onChildAdded(com.firebase.client.DataSnapshot dataSnapshot, String s) {
            UserInformation sI = dataSnapshot.getValue(UserInformation.class);
            listScore.add(sI);
            adapter.notifyDataSetChanged();
        }

        @Override
        public void onChildChanged(com.firebase.client.DataSnapshot dataSnapshot, String s) {

        }

        @Override
        public void onChildRemoved(com.firebase.client.DataSnapshot dataSnapshot) {

        }

        @Override
        public void onChildMoved(com.firebase.client.DataSnapshot dataSnapshot, String s) {

        }

        @Override
        public void onCancelled(FirebaseError firebaseError) {

        }
    });
}
</code></pre>

<p>My Model Class:</p>

<pre><code>public class UserInformation implements Comparable&lt;UserInformation&gt; {

    public String name;
    public String age;
    public String score;

    public UserInformation() {}

    public UserInformation(String name, String age, String score) {
        this.name = name;
        this.age = age;
        this.score = score;
    }

    // ... Getters and Setters here. 
}
</code></pre>

<p>These piece of code works, it sorts from lowest to highest.</p>

<p>My Problem is how do I sort it from Highest to Lowest? Suggestions and advises are much appreciated.</p>