我正在使用httpurlconnection将帖子发送到我的php代码，然后使用它来获取值给我的回收

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prepare("SELECT delivery_id,delivery_number,confirm_rider,confirm_payment,delivery_status,item_pic FROM user_delivery WHERE phone=$email"); //executing the query $stmt->execute(); //binding results to the query $stmt->bind_result($id, $deliveryno, $confirmrider,$confirmpayment,$deliverystatus,$itempic); $product = array(); //traversing through all the result while($stmt->fetch()){ $temp = array(); $temp['delivery_id'] = $id; $temp['delivery_number'] = $deliveryno; $temp['confirm_rider'] = $confirmrider; $temp['confirm_payment'] = $confirmpayment; $temp['delivery_status'] = $deliverystatus; $temp['item_pic'] = $itempic; array_push($product, $temp); } //displaying the result in json format echo json_encode($product); ?> 但它告诉我未定义电子邮件，同时它会将值返回给我的吐司，而不是我的回收者视图