有没有办法更新AsyncTask中的变量？

public interface OnVariableUpdateListener {
    void onVariableUpdate(String value);
}

public class MyAsyncTask extends AsyncTask<Void, Void, Void> {
    private OnVariableUpdateListener mListener;

    public MyAsyncTask(OnVariableUpdateListener listener) {
        mListener = listener;
    }

    @Override
    protected Void doInBackground(Void... voids) {
        // 在需要更新变量的地方调用 mListener.onVariableUpdate(value);
        return null;
    }
}

public class MainActivity extends AppCompatActivity implements OnVariableUpdateListener {
    private String mVariable;

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

        MyAsyncTask task = new MyAsyncTask(this);
        task.execute();
    }

    @Override
    public void onVariableUpdate(String value) {
        mVariable = value;
        // 更新UI或者进行其他操作
    }
}

public class MyAsyncTask extends AsyncTask<Void, Void, Void> {
    private Handler mHandler;

    public MyAsyncTask(Handler handler) {
        mHandler = handler;
    }

    @Override
    protected Void doInBackground(Void... voids) {
        // 在需要更新变量的地方发送消息给 mHandler
        mHandler.sendMessage(mHandler.obtainMessage(1, value));
        return null;
    }
}

public class MainActivity extends AppCompatActivity {
    private String mVariable;
    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == 1) {
                mVariable = (String) msg.obj;
                // 更新UI或者进行其他操作
            }
        }
    };

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

        MyAsyncTask task = new MyAsyncTask(mHandler);
        task.execute();
    }
}