如何在 flutter 的文本小部件中使用雙精度值

Question

我收到了 API 的回復

{"id":1,"title":"Fjallraven - Foldsack No. 1 Backpack, Fits 15 Laptops","price":109.95,"description":"Your perfect pack for everyday use and walks in the forest. Stash your laptop (up to 15 inches) in the padded sleeve, your everyday","category":"men's clothing","image":"https://fakestoreapi.com/img/81fPKd-2AYL._AC_SL1500_.jpg","rating":{"rate":3.9,"count":120}},

我在Text小部件中顯示price ，但它給了我這個錯誤

type 'double' is not a subtype of type 'int'請告訴我如何在文本小部件中顯示雙精度值

產品型號 class：

class ProductModel {
  ProductModel(
      {required this.title,
      required this.id,
      required this.urlImage,
      required this.price});

  String title;
  int id;
  String urlImage;
  String price;

  factory ProductModel.fromJson(Map<String, dynamic> json) => ProductModel(
      id: json["id"],
      title: json["price"],
      urlImage: json["image"],
      price: json["price"]);

  Map<String, dynamic> toJson() =>
      {"id": id, "title": title, "image": urlImage, "price": price};
}

Answer 1

試試下面的代碼希望它對你有幫助。

您的 var 聲明：

double price = 109.95; 

您的小部件：

使用字符串插值：

    Text(
        'Price: $price',
      ),

或使用 toString()：

  Text(
         price.toString() ,
      ),

結果屏幕->

Answer 2

@Ravindra 的答案是正確的，但您需要修復您的 model。

一、將價格類型改為雙倍

二、改變

price: json['price']

至

price: (json['price'] as num)?.toDouble()