android线程代码,Android 线程给Activity发送消息（Handler Messag）

[android]代码库public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

mTextView = (TextView) findViewById(R.id.myTextView);

mHandler = new Handler() {

public void handleMessage(Message msg) { /* 这里是处理信息的方法 */

switch (msg.what) {

case 123: /* 在这处理要TextView对象Show时间的事件 */

mTextView.setText(mHour + " : " + mMinutes);

break;

}

super.handleMessage(msg);

}

};

mClockThread = new LooperThread();

mClockThread.start();

}

class LooperThread extends Thread {

public void run() {

super.run();

try {

do { /* 取得系统时间 */

long time = System.currentTimeMillis(); /* 透过Calendar对象来取得小时与分钟 */

final Calendar mCalendar = Calendar.getInstance();

mCalendar.setTimeInMillis(time);

mHour = mCalendar.get(Calendar.HOUR);

mMinutes = mCalendar.get(Calendar.MINUTE); /* 让线程休息一秒 */

Thread.sleep(1000); /* 重要关键程序:取得时间后发出讯息给Handler */

Message m = new Message();

m.what = 123;

EX04_14.this.mHandler.sendMessage(m);

} while (EX04_14.LooperThread.interrupted() == false); /* 当系统发出中断讯息时停止本循环 */

} catch (Exception e) {

e.printStackTrace();

}

}

}