如何将firebase新增的数据添加到GridView/ListView的顶部，而不是ANDROID的底部

public class MyAdapter extends ArrayAdapter<String> {
    private ArrayList<String> mDataList;

    public MyAdapter(Context context, int resource, ArrayList<String> dataList) {
        super(context, resource, dataList);
        this.mDataList = dataList;
    }

    public void addDataToTop(String data) {
        mDataList.add(0, data);
        notifyDataSetChanged();
    }
}

public class MyActivity extends AppCompatActivity {
    private GridView mGridView;
    private MyAdapter mAdapter;
    private DatabaseReference mDatabaseRef;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mGridView = findViewById(R.id.grid_view);
        mAdapter = new MyAdapter(this, R.layout.grid_item, new ArrayList<String>());
        mGridView.setAdapter(mAdapter);

        // 获取Firebase数据库的引用
        mDatabaseRef = FirebaseDatabase.getInstance().getReference("your_data_node");

        // 添加Firebase数据监听器
        mDatabaseRef.addChildEventListener(new ChildEventListener() {
            @Override
            public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
                String newData = dataSnapshot.getValue(String.class);
                mAdapter.addDataToTop(newData);
            }

            // 其他监听器方法...

        });
    }
}