To convert a JSON into an object in Flutter, you can use the jsonDecode
function from the dart:convert
package. Here's an example code snippet:
import 'dart:convert';
class YourObject {
// define the properties of your object here
String name;
int age;
YourObject({this.name, this.age});
factory YourObject.fromJson(Map<String, dynamic> json) {
return YourObject(
name: json['name'],
age: json['age'],
);
}
}
void convertJsonToObject(String jsonString) {
final Map<String, dynamic> jsonMap = jsonDecode(jsonString);
final YourObject yourObject = YourObject.fromJson(jsonMap.cast<String, dynamic>());
// do something with yourObject
}
In the convertJsonToObject
function, we first decode the JSON string into a Map<String, dynamic>
using jsonDecode
. Then we create an instance of the YourObject
class using the fromJson
factory constructor, which takes a Map<String, dynamic>
parameter. However, we need to cast the jsonMap
to a Map<String, dynamic>
using cast<String, dynamic>()
to avoid the NoSuchMethodError
error you mentioned.
Make sure to replace YourObject
with the name of your own object class, and update the fromJson
factory constructor to match the properties of your object.
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Asked: 2023-03-22 11:00:00 +0000
Seen: 10 times
Last updated: Feb 25 '22
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