shared_preferences http store data

 

import 'dart:convert';

import 'package:cached_network_image/cached_network_image.dart';

import 'package:flutter/material.dart';

import 'package:http/http.dart' as http;

import 'package:shared_preferences/shared_preferences.dart';

class HttpsInternetData extends StatefulWidget {

  const HttpsInternetData({super.key});

  @override

  State<HttpsInternetData> createState() => HttpsInternetDataState();

}

class HttpsInternetDataState extends State<HttpsInternetData> {

  List<dynamic>? data;

  Future<void> saveData() async {

    SharedPreferences sharedPreferences = await SharedPreferences.getInstance();

    List<String>? saveValue = sharedPreferences.getStringList('Int');

    if (saveValue != null) {

      setState(() {

        data = saveValue.map((e) => json.decode(e)).toList();

      });

    }

  }

  Future<void> getData() async {

    var res = await http.get(Uri.parse('https://aponali.github.io/api/allapon.json'));

    if (res.statusCode == 200) {

      var decode = json.decode(res.body) as List;

      setState(() {

        data = decode;

      });

      SharedPreferences sharedPreferences = await SharedPreferences.getInstance();

      sharedPreferences.setStringList('Int', decode.map((e) => json.encode(e)).toList());

    }

  }

  @override

  void initState() {

    super.initState();

    saveData();

    getData();

  }

  @override

  Widget build(BuildContext context) {

    return Scaffold(

      body: ListView.builder(

        itemCount: data == null ? 0 : data!.length,

        itemBuilder: (BuildContext context, int index) {

          return SizedBox(

            height: 100,

            width: 70,

            child: CachedNetworkImage(

              imageUrl: data![index]["allappimage"],

            ),

          );

        },

      ),

    );

  }

}