Android 为Notification加上一个进度条

package  com.notification;

import  android.app.Activity;
import  android.app.Notification;
import  android.app.NotificationManager;
import  android.app.PendingIntent;
import  android.content.Intent;
import  android.os.Bundle;
import  android.os.Handler;
import  android.os.Message;
import  android.view.View;
import  android.view.View.OnClickListener;
import  android.widget.Button;
import  android.widget.RemoteViews;
import  android.widget.Toast;

public   class  nofificationActivity  extends  Activity  implements  OnClickListener {

     private   static   final   int  NOTIFICATION_ID  =   0x12 ;
     private  Notification notification  =   null ;
     private  NotificationManager manager  =   null ;

     public  Handler handler;
     private   int  _progress  =   0 ;
     private  Thread thread  =   null ;
     private   boolean  isStop  =   false ;

     //  当界面处理停止的状态 时，设置让进度条取消
    @Override
     protected   void  onPause() {
         //  TODO Auto-generated method stub
        isStop  =   false ;
        manager.cancel(NOTIFICATION_ID);

         super .onPause();
    }

     /**  Called when the activity is first created.  */
    @Override
     public   void  onCreate(Bundle savedInstanceState) {
         super .onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button btn  =  (Button) findViewById(R.id.Button01);
        btn.setOnClickListener( this );
        notification  =   new  Notification(R.drawable.icon,  " 带进条的提醒 " , System
                .currentTimeMillis());
        notification.icon  =  R.drawable.icon;

         //  通过RemoteViews 设置notification中View 的属性
        notification.contentView  =   new  RemoteViews(getApplication()
                .getPackageName(), R.layout.custom_dialog);
        notification.contentView.setProgressBar(R.id.pb,  100 ,  0 ,  false );
        notification.contentView.setTextViewText(R.id.tv,  " 进度 "   +  _progress
                 +   " % " );
         //  通过PendingIntetn
         //  设置要跳往的Activity，这里也可以设置发送一个服务或者广播，
         //  不过在这里的操作都必须是用户点击notification之后才触发的
        notification.contentIntent  =  PendingIntent.getActivity( this ,  0 ,
                 new  Intent( this , remoteView. class ),  0 );
         //  获得一个NotificationManger 对象，此对象可以对notification做统一管理，只需要知道ID
        manager  =  (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

    }

    @Override
     public   void  onClick(View v) {
         //  TODO Auto-generated method stub
        isStop  =   true ;
        manager.notify(NOTIFICATION_ID, notification);
        thread  =   new  Thread( new  Runnable() {

            @Override
             public   void  run() {
                Thread.currentThread();
                 //  TODO Auto-generated method stub
                 while  (isStop) {
                    _progress  +=   10 ;
                    Message msg  =  handler.obtainMessage();
                    msg.arg1  =  _progress;
                    msg.sendToTarget();

                     try  {
                        Thread.sleep( 500 );
                    }  catch  (InterruptedException e) {
                         //  TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }
        });
        thread.start();

        handler  =   new  Handler() {
            @Override
             public   void  handleMessage(Message msg) {
                 //  TODO Auto-generated method stub
                notification.contentView.setProgressBar(R.id.pb,  100 , msg.arg1,
                         false );
                notification.contentView.setTextViewText(R.id.tv,  " 进度 "
                         +  msg.arg1  +   " % " );
                manager.notify(NOTIFICATION_ID, notification);

                 if  (msg.arg1  ==   100 ) {
                    _progress  =   0 ;
                    manager.cancel(NOTIFICATION_ID);
                    isStop  =   false ;
                    Toast.makeText(nofificationActivity. this ,  " 下载完毕 " ,  1000 )
                            .show();
                }
                 super .handleMessage(msg);
            }
        };
    }
}