android應(yīng)用開(kāi)發(fā)：實(shí)時(shí)改變TextView的值

線程實(shí)時(shí)刷新TextView值：

思路：

1）使用handler通知view修改值；

2）標(biāo)志位控制線程的停止/開(kāi)始;

/**

* 1、刷新線程

*

* @author wxm

*

*/

class RefreshThread implements Runnable {

public void run() {

while (isStop) {

try {

handler.sendMessage(handler.obtainMessage());

Thread.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}

備注：sendMessage發(fā)送消息

/**

* 2、實(shí)時(shí)刷新界面

*/

Handler handler = new Handler() {

public void handleMessage(Message msg) {

super.handleMessage(msg);

System.out.println("count--->" + count);

if (count == 5) {

isStop = false;

try {

Thread.sleep(3000);

isStop = true;

count = 0;

new Thread(mRefreshThread).start();

} catch (InterruptedException e) {

e.printStackTrace();

}

}

textview.setText(String.valueOf(count++));

}

};

備注：接收消息，并修改停止/開(kāi)始標(biāo)志位

3、初始化控件

private TextView textview = null; // TextView 控件

private int count = 0;//初始化數(shù)值

private RefreshThread mRefreshThread = null;//刷新線程

private boolean isStop = true;// 線程控制標(biāo)志

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

textview = (TextView) findViewById(R.id.textview);

mRefreshThread = new RefreshThread();

textview.setText(String.valueOf(count));

new Thread(mRefreshThread).start();// 開(kāi)始進(jìn)程

}