public void startCodeScanner() {
    WxPayFace.getInstance().startCodeScanner(new IWxPayfaceCallback() {
        @Override
        public void response(Map info) throws RemoteException {
            if (info != null) {
                String return_code = (String) info.get("return_code");
                String return_msg = (String) info.get("return_msg");
                String code_msg = (String) info.get("code_msg");
                final String resultString = "startCodeScanner, return_code : " + return_code + " return_msg : " + return_msg + " code_msg: " + code_msg;
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        mFaceCallback.setText(resultString);
                    }
                });
                HashMap map=new HashMap<>();
                if (!TextUtils.isEmpty(code_msg)){
                    map.put("auth_code",code_msg);
                }
                //authcodePay(map);
                WxPayFace.getInstance().stopCodeScanner();//!!！这里为什么关闭成功，扫码成功后设备还能继续扫码
            }
        }
    });
    Toast.makeText(this, "启动条码识别成功", Toast.LENGTH_LONG).show();
}