使用service定期执行一个服务

import android.app.Service;import android.os.Handler;public class PeriodicService extends Service {private Handler mPeriodicEventHandler;    private final int PERIODIC_EVENT_TIMEOUT = 30000;    @Override    public void onCreate() {      super.onCreate();      mPeriodicEventHandler = new Handler();      mPeriodicEventHandler.postDelayed(doPeriodicTask, PERIODIC_EVENT_TIMEOUT);    }    private Runnable doPeriodicTask = new Runnable()    {        public void run()         {            //your action here            mPeriodicEventHandler.postDelayed(doPeriodicTask, PERIODIC_EVENT_TIMEOUT);        }    };    @Override    public void onDestroy() {        mPeriodicEventHandler.removeCallbacks(doPeriodicTask);              super.onDestroy();    }}