Android 中更新UI的方法

public class MainActivity extends Activity {
    //...

    private void myTask() {
        Thread mThread = new Thread() { //new thread         
            public void run() {
                sleep(1000);
                //更新UI
                runOnUiThread(new Runnable() {  
                    @Override
                    public void run() {
                        mTextView.Text="123";
                    }
                });
            };
        };
        mThread.start();
    }
}

public class XxThread extends Thread {
    //定义UI线程句柄
    Handler UIHandler = new Handler(Looper.getMainLooper());
    
    //线程主函数
    public void run() {
        //更新UI
        UIHandler.post(new Runnable() {
            @Override
            public void run() {
                mTextView.Text="123";
            }
        });
    }
}