service broadcast更新activity界面

package com.ct.dynamicui;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.IntentFilter;
import android.graphics.Color;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity {

    public static String TIME_CHANGED_ACTION = "com.ct.dynamicui.TIME_CHANGED_ACTION"; 
    public static TextView time = null;
    private Intent timeService  = null;
    UITimeReceiver receiver ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        initView();
        registerBroadcastReceiver();   
        startTimeService();  
    }
    
    
    public static TextView getTime() {
        return time;
    }


    public static void setTime(TextView time) {
        MainActivity.time = time;
    }


    private void initView(){
        time = (TextView)findViewById(R.id.time);
        time.setTextColor(Color.RED);  
        time.setTextSize(15);  
    }
    
    private void startTimeService(){
        timeService = new Intent(this,MyService.class);
        startService(timeService);
    }
    
    private void registerBroadcastReceiver(){
        receiver = new UITimeReceiver();
        IntentFilter filter = new IntentFilter(TIME_CHANGED_ACTION);
        registerReceiver(receiver, filter);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }


    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        unregisterReceiver(receiver);
        stopService(timeService);
    }
    
    

}

package com.ct.dynamicui;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Service;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;

public class MyService extends Service{

    private String TAG = "TimeSerMyServicevice";  
    private Timer timer = null;  
    private SimpleDateFormat sdf = null;  
    private Intent timeIntent = null;  
    private Bundle bundle = null;  
    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        init();
        timer.schedule(new TimerTask() {
            
            @Override
            public void run() {
                // TODO Auto-generated method stub
                sendTimeChangedBroadcast();
            }
        }, 1000,1000);
    }
    
    private void init(){
        timer = new Timer();
        sdf = new SimpleDateFormat("yyyy年MM月dd日 "+"hh:mm:ss");
        timeIntent = new Intent();
        bundle = new Bundle();
    }
    
    private String getTime(){  
        return sdf.format(new Date());  
    }  
    private void sendTimeChangedBroadcast(){
        bundle.putString("time", getTime());
        timeIntent.setAction(MainActivity.TIME_CHANGED_ACTION);
        timeIntent.putExtras(bundle);
        sendBroadcast(timeIntent);
    }

    @Override
    public void onStart(Intent intent, int startId) {
        // TODO Auto-generated method stub
        super.onStart(intent, startId);
    }

    
}

package com.ct.dynamicui;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;

public class UITimeReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        String action = intent.getAction();
        if(action.equals(MainActivity.TIME_CHANGED_ACTION)){
            Bundle bundle = intent.getExtras();
            String stringTime = intent.getStringExtra("time");
            MainActivity.getTime().setText(stringTime);
        }
    }

}

 （在F:\java\DynamicUI）