protected static final String TAG = "WatchDogService";private AppLockDao dao;private List<String> lockApps;private ActivityManager am;private Intent lockappintent;@Overridepublic IBinder onBind(Intent intent) {    return null;}/*** 服務(wù)第一次被調(diào)用的時候調(diào)用 的方法*/@Overridepublic void onCreate() {    super.onCreate();    dao = new AppLockDao(this);    //得到所用的要鎖定的應(yīng)用程序    lockApps = dao.getAllPackName();    am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);    lockappintent = new Intent(this,LockScreenActivity.class);    lockappintent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);    new Thread(){      public void run() {        while(true){          try {            //得到當(dāng)前正在運(yùn)行應(yīng)用程序的報名            //返回系統(tǒng)里的任務(wù)棧的信息，taskInfos只有一個元素，對應(yīng)當(dāng)前正在運(yùn)行的應(yīng)用程序            List<RunningTaskInfo> taskInfos = am.getRunningTasks(1);            RunningTaskInfo currentTask = taskInfos.get(0);            //獲取當(dāng)前用戶可見的Activity所在的程序的包名            String packName = currentTask.topActivity.getPackageName();            Log.i(TAG, "當(dāng)前運(yùn)行的程序包名："+packName);            if(lockApps.contains(packName)){//鎖定              lockappintent.putExtra("packname", packName);              startActivity(lockappintent);            }else{//放行            }            sleep(200);          } catch (Exception e) {            e.printStackTrace();          }        }      };    }.start();}