private void exitApp(Context context) {

    Intent serviceIntent = new Intent(context, AutoUpdateService.class);
    context.stopService(serviceIntent);

    // 清除通知;
    NotificationManager notiManager =
        (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    notiManager.cancelAll();

    CacheManager.getInstance().clear();

    GlobalVars.clear();

    HttpRequestHelper.shutdown();

    android.os.Process.killProcess(android.os.Process.myPid());
  }