Activity與Service通信

Activity向Service發消息（在Service運行過程中）：

在Service中實現一個繼承自Binder的內部類，

private final IBinder binder = new LocalBinder();  

public class LocalBinder extends Binder {  
public LogService getService() {  
       return LogService.this;  
   }   

public void stopRunning(){
isRunning = false;
}
}  
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return binder;
}

在Activity中獲取這個binder實例：

private boolean isConnected;
    private ServiceConnection mConnection = new ServiceConnection() {  
        
        @Override  
        public void onServiceDisconnected(ComponentName arg0) {  
            // TODO Auto-generated method stub  
            isConnected=false;  
        }  
          
        @Override  
        public void onServiceConnected(ComponentName arg0, IBinder binder) {  
            // TODO Auto-generated method stub  
        localBinder = (LocalBinder) binder;  
        logSvc =((LocalBinder) localBinder).getService();  
        
            isConnected=true;
              
        }  
    };  

啓動服務並bind：

startService(intent);
doBindService();

即可通過這個binder實例與運行中的service通信：

localBinder.stopRunning();

Service向Activity發消息：

利用BroadcastReceiver。在Activity中註冊：

mReceiver = new timeUpReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction("com.zhuming.broadcast.timeup");
this.registerReceiver(mReceiver, filter);

public class timeUpReceiver extends BroadcastReceiver {
 
 @Override
 public void onReceive(Context context, Intent intent) {
 toggleBtn.setChecked(false);
 toggleTxt.setText("等待超時，請重新開啓服務");
 }
}

在Service中發送廣播：

Intent intent = new Intent("com.zhuming.broadcast.timeup");
sendBroadcast(intent);