如何从下载服务更新ListView的行

// 在Activity或Fragment中注册广播接收器或实现回调接口
public class MainActivity extends AppCompatActivity {
    private ListView listView;
    private MyAdapter adapter;

    // 在onCreate()方法中注册广播接收器或实现回调接口
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView = findViewById(R.id.listView);
        adapter = new MyAdapter(this);
        listView.setAdapter(adapter);

        // 注册广播接收器或实现回调接口
        MyBroadcastReceiver receiver = new MyBroadcastReceiver();
        IntentFilter filter = new IntentFilter("com.example.DOWNLOAD_COMPLETE");
        registerReceiver(receiver, filter);
    }

    // 广播接收器或回调接口的实现
    private class MyBroadcastReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            // 下载任务完成或有新的数据可用时触发该方法
            // 更新ListView的行
            int position = intent.getIntExtra("position", -1);
            String newData = intent.getStringExtra("data");

            if (position != -1) {
                // 获取适配器对象
                MyAdapter adapter = (MyAdapter) listView.getAdapter();
                // 获取需要更新的数据对象
                MyData data = (MyData) adapter.getItem(position);
                // 更新数据对象中的字段或属性
                data.setText(newData);
                // 通知ListView刷新数据
                adapter.notifyDataSetChanged();
            }
        }
    }
}

// 自定义适配器
public class MyAdapter extends BaseAdapter {
    private Context context;
    private List<MyData> dataList;

    public MyAdapter(Context context) {
        this.context = context;
        this.dataList = new ArrayList<>();
    }

    // 添加数据到适配器
    public void addData(MyData data) {
        dataList.add(data);
        notifyDataSetChanged();
    }

    // 获取数据项的数量
    @Override
    public int getCount() {
        return dataList.size();
    }

    // 获取指定位置的数据项
    @Override
    public Object getItem(int position) {
        return dataList.get(position);
    }

    // 获取指定位置的数据项ID
    @Override
    public long getItemId(int position) {
        return position;
    }

    // 创建或复用列表项视图
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;

        if (convertView == null) {
            convertView = LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
            holder = new ViewHolder();
            holder.textView = convertView.findViewById(R.id.textView);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        MyData data = (MyData) getItem(position);
        holder.textView.setText(data.getText());

        return convertView;
    }

    // 列表项视图的容器
    private static class ViewHolder {
        TextView textView;
    }
}

// 自定义数据类
public class MyData {
    private String text;

    public MyData(String text) {
        this.text = text;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }
}

// 下载服务中发送广播或调用回调接口
public class DownloadService extends Service {
    // 下载任务完成或有新的数据可用时调用该方法
    private void notifyDownloadComplete(int position, String newData) {
        Intent intent = new Intent("com.example.DOWNLOAD_COMPLETE");
        intent.putExtra("position", position);
        intent.putExtra("data", newData);
        sendBroadcast(intent);
    }
}