如何在 Flutter 的文本小部件中使用双精度值

Question

我收到了 API 的回复

{"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}},

我将 price 显示到 Text 小部件中，但它给我这个错误

type 'double' is not a subtype of type 'int' 请让我知道如何在文本小部件中显示双精度值

ProductModel 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

试试下面的代码希望对你有帮助。

您的 var 声明：

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() ,
      ),

结果屏幕->

Answer 2

@Ravindra 的回答是正确的，但你需要修复你的模型。

首先，将价格类型更改为双倍

二、改变

price: json['price']

至

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

如何在 Flutter 的文本小部件中使用双精度值

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