Android 定时器demo

注意点：

1：必须创建一个新对象来同步

2：New Thread中需要用post对原线程中的对象进行操作

3：在New Thread中用 wait进行定时

package com.example.appc;import android.os.Bundle;import android.app.Activity;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class MainActivity extends Activity {    Button startButton ;    TextView minuteTextView ;    //contorl bool     static boolean sign = false;    Clock c = new Clock();    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        startButton = (Button)findViewById(R.id.button1);        minuteTextView = (TextView)findViewById(R.id.textView1);               startButton.setOnClickListener(new MyButtonListener());    }    class MyButtonListener implements OnClickListener{    public void onClick(View v) {sign = !sign;if(sign == false) return;new Thread(new Runnable() {public void run() {while( sign ){try{synchronized (c) {minuteTextView.post(new Runnable() {public void run() {minuteTextView.setText("99");}});c.wait(500L);minuteTextView.post(new Runnable() {public void run() {minuteTextView.setText("0");} });c.wait(500L);}}catch(InterruptedException e){}}}}).start();}    }public class Clock {int justATmp = 0;}}