Kingkor Roy Tirtho
80 lines
2.0 KiB
Dart
80 lines
2.0 KiB
Dart
import 'dart:convert';
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import 'package:fl_query/fl_query.dart';
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import 'package:flutter/material.dart';
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import 'package:http/http.dart' as http;
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final queryDiskCacheExampleQuery = QueryJob<List<User>, void>(
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queryKey: 'queryDiskCacheExampleQuery',
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serialize: (data) {
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return jsonEncode(data.map((user) => user.toJson()).toList());
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},
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deserialize: (raw) {
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return List.from(jsonDecode(raw))
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.map((user) => User.fromJson(user))
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.toList();
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},
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task: (_, __) async {
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final res =
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await http.get(Uri.parse("https://jsonplaceholder.typicode.com/users"));
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final body = List.from(jsonDecode(res.body))
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.map((user) => User.fromJson(user))
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.toList()
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..shuffle();
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await Future.delayed(const Duration(seconds: 5));
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return body;
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},
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);
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class User {
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int? id;
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String? name;
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String? username;
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String? email;
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User({this.id, this.name, this.username, this.email});
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User.fromJson(Map<String, dynamic> json) {
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id = json['id'];
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name = json['name'];
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username = json['username'];
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email = json['email'];
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}
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Map<String, dynamic> toJson() {
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final Map<String, dynamic> data = {};
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data['id'] = id;
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data['name'] = name;
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data['username'] = username;
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data['email'] = email;
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return data;
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}
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}
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class QueryDiskCacheExample extends StatelessWidget {
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const QueryDiskCacheExample({Key? key}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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return QueryBuilder<List<User>, void>(
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job: queryDiskCacheExampleQuery,
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externalData: null,
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builder: (context, query) {
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if (!query.hasData) {
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return const Center(child: CircularProgressIndicator());
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}
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return ListView.builder(
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shrinkWrap: true,
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itemCount: query.data?.length,
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itemBuilder: (context, index) {
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return ListTile(
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title: Text(query.data![index].name!),
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subtitle: Text(query.data![index].email!),
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);
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},
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);
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},
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);
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}
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}
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