将数据从arraylist加载到listview时显示进度条

// 布局文件：activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="16dp"
    android:paddingTop="16dp"
    android:paddingRight="16dp"
    android:paddingBottom="16dp"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" />

</RelativeLayout>

// MainActivity.java
public class MainActivity extends AppCompatActivity {

    private ListView listView;
    private ProgressBar progressBar;
    private MyAdapter adapter;

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

        listView = findViewById(R.id.listView);
        progressBar = findViewById(R.id.progressBar);

        adapter = new MyAdapter();
        listView.setAdapter(adapter);

        new LoadDataTask().execute();
    }

    private class LoadDataTask extends AsyncTask<Void, Integer, Void> {

        private ArrayList<String> data = new ArrayList<>();

        @Override
        protected Void doInBackground(Void... voids) {
            // 模拟加载数据
            for (int i = 0; i < 100; i++) {
                data.add("Item " + i);
                publishProgress((i + 1)); // 更新进度
                try {
                    Thread.sleep(100); // 模拟耗时操作
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            return null;
        }

        @Override
        protected void onProgressUpdate(Integer... values) {
            int progress = values[0];
            progressBar.setProgress(progress);
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            adapter.setData(data);
            progressBar.setVisibility(View.GONE);
        }
    }

    private class MyAdapter extends BaseAdapter {

        private ArrayList<String> data = new ArrayList<>();

        public void setData(ArrayList<String> data) {
            this.data = data;
            notifyDataSetChanged();
        }

        @Override
        public int getCount() {
            return data.size();
        }

        @Override
        public Object getItem(int position) {
            return data.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
            }

            TextView textView = convertView.findViewById(android.R.id.text1);
            textView.setText(data.get(position));

            return convertView;
        }
    }
}