Android(安卓)Timer的应用示例

 1 package com.hyzhou.timerdemo1; 2  3 import java.util.Timer; 4 import java.util.TimerTask; 5  6 import android.os.Bundle; 7 import android.os.Handler; 8 import android.os.Message; 9 import android.util.Log;10 import android.view.View;11 import android.view.View.OnClickListener;12 import android.widget.Button;13 import android.widget.TextView;14 import android.app.Activity;15 16 public class MainActivity extends Activity {17 18      // 定义计时器19     Timer timer=new Timer();20     21     private TextView tv;22     private Button bt;23     24     @Override25     protected void onCreate(Bundle savedInstanceState) {26         super.onCreate(savedInstanceState);27         setContentView(R.layout.activity_main);28         //定义UI组件29         tv=(TextView)findViewById(R.id.tv);30         bt=(Button)findViewById(R.id.bt);31         32         Log.i("hyzhou", Thread.currentThread().getName());33         //定义Handler34          final Handler handler=new Handler(){35 36             @Override37             public void handleMessage(Message msg) {38                 // TODO Auto-generated method stub39                 super.handleMessage(msg);40                 //handler处理消息41                 if (msg.what>0) {42                     tv.setText(" "+msg.what);43                 }44                 else {45                     //在handler里可以更改UI组件46                     tv.setText("开始点火");47                     timer.cancel();48                 }49             }50             51         };52         // 定义按钮的点击监听器53         bt.setOnClickListener(new OnClickListener() {54             55             @Override56             public void onClick(View v) {57                 // TODO Auto-generated method stub58                 timer.schedule(new TimerTask() {59                     int i=10;60                     // TimerTask 是个抽象类,实现的是Runable类61                     @Override62                     public void run() {63                         // TODO Auto-generated method stub64                         Log.i("hyzhou", Thread.currentThread().getName());65                         //定义一个消息传过去66                         Message message=new Message();67                         message.what=i--;68                         handler.sendMessage(message);69                     }70                 }, 1000, 2000);71             }72         });73         74     }75 76 }
参考：http://www.360doc.com/content/11/1129/15/6541311_168365884.shtml
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