private boolean reqEnable() {
//        Log.i(TAG, "reqEnable");
        if (!timer_run) {
            timer_run = true;
            final Thread timerThread = new Thread() {
                @Override
                public void run() {
                    try {
                        sleep(2000);
                    } catch (Exception e) {

                    }
                    timer_run = false;
//                    Log.i(TAG, "reqEnable thread end timer_run = " + timer_run);
                }
            };
            timerThread.start();
            return true;
        } else {
//            Log.i(TAG, "访问频率2秒最多1次");
            return false;
        }
    }