fromJson
method to convert the JSON string to the list of custom objects.fromJson
method.Here is an example implementation:
class CustomObject {
String field1;
int field2;
CustomObject({this.field1, this.field2});
factory CustomObject.fromJson(Map<String, dynamic> json) {
return CustomObject(
field1: json['field1'],
field2: json['field2'],
);
}
Map<String, dynamic> toJson() => {
'field1': field1,
'field2': field2,
};
}
// Retrieve the saved JSON string from shared preferences
final prefs = await SharedPreferences.getInstance();
final jsonString = prefs.getString('customObjects');
// Convert the JSON string to a list of custom objects
final List<dynamic> jsonList = jsonDecode(jsonString);
final List<CustomObject> customObjects = jsonList.map((e) => CustomObject.fromJson(e)).toList();
Note: This example assumes that the saved JSON string is valid and contains a list of custom objects that follow the defined structure. You should include error handling in your implementation to handle cases where the JSON string is invalid or the mapping fails.
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Asked: 2023-05-17 13:01:24 +0000
Seen: 10 times
Last updated: May 17 '23
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