Android:从匿名类向线程返回值的正确方法是什么？

public interface Callback {
    void onResult(String result);
}

public class MyThread extends Thread {
    private Callback callback;

    public MyThread(Callback callback) {
        this.callback = callback;
    }

    @Override
    public void run() {
        // 执行耗时操作
        String result = "Hello World";
        callback.onResult(result);
    }
}

// 在调用处
MyThread myThread = new MyThread(new Callback() {
    @Override
    public void onResult(String result) {
        // 处理返回结果
        Log.d(TAG, "Result: " + result);
    }
});
myThread.start();

public class MyThread extends Thread {
    private Handler handler;

    public MyThread(Handler handler) {
        this.handler = handler;
    }

    @Override
    public void run() {
        // 执行耗时操作
        String result = "Hello World";
        Message message = handler.obtainMessage();
        message.obj = result;
        handler.sendMessage(message);
    }
}

// 在主线程中
Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        String result = (String) msg.obj;
        // 处理返回结果
        Log.d(TAG, "Result: " + result);
    }
};

MyThread myThread = new MyThread(handler);
myThread.start();