跳票工厂

    private ProgressDialog mProgress;

    private Handler showLoadingHandler = new Handler()

    {

        public void handleMessage(Message msg)

        {

            mProgress = ProgressDialog.show(instance, null, "加载中..."

‍            , true, false);

        };

    };

    private Handler hideLoadingHandler = new Handler()

    {

        public void handleMessage(Message msg)

        {

            if (mProgress != null)

            {

                mProgress.hide();

                mProgress = null;

            }

        };

    };