android 定時器實作一

方法一:Handler+Thread

package com.xunfang.handerDemo;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.widget.TextView;

public class HanderDemoActivity extends Activity {

TextView tvShow;

private int i = 0;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

tvShow = (TextView) findViewById(R.id.tv_show);

new Thread(new ThreadShow()).start();

}

// handler類接收資料

Handler handler = new Handler() {

public void handleMessage(Message msg) {

if (msg.what == 1) {

tvShow.setText(Integer.toString(i++));

System.out.println("receive....");

}

};

};

// 線程類

class ThreadShow implements Runnable {

@Override

public void run() {

// TODO Auto-generated method stub

while (true) {

try {

Thread.sleep(1000);

Message msg = new Message();

msg.what = 1;

handler.sendMessage(msg);

System.out.println("send...");

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println("thread error...");

}

}

}

}

}