@Override
 public void onClick(View v) {
   switch (v.getId()) {
     case R.id.btn_sub:
       String extend_msg = et_extend_msg.getText().toString();
       String refund_amount = et_pay_price.getText().toString();
       if (Double.valueOf(refund_amount) > Double.valueOf(goods_pay_price)) {
         Toast.makeText(E3_Activity_Returns.this, "金额输入错误", Toast.LENGTH_LONG).show();
       } else {
         loadingPDialog.show();
         HttpUtils.refund(
             res, order_id, rec_id, refund_type, refund_amount, goods_num, extend_msg);
       }
       break;
     case R.id.ll_check_1:
       check_1.setChecked(true);
       check_2.setChecked(false);
       refund_type = "1";
       break;
     case R.id.ll_check_2:
       check_2.setChecked(true);
       check_1.setChecked(false);
       refund_type = "2";
       break;
     case R.id.iv_back:
       this.finish();
       break;
     default:
       break;
   }
 }