srt_app/lib/pages/home.dart

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:path_provider/path_provider.dart';

class HomeScreen extends StatefulWidget {
  const HomeScreen({Key? key}) : super(key: key);

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  List _schedule = [];

  @override
  void initState() {
    super.initState();
    _getSchedule();
  }

  Future<void> _getSchedule() async {
    final String scheduleFile =
        await rootBundle.loadString("assets/data/schedule.json");
    final data = await json.decode(scheduleFile);

    setState(() {
      _schedule = data["records"];
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Home'),
        actions: <Widget>[
          IconButton(
            icon: const Icon(Icons.more_vert),
            onPressed: () {
              ScaffoldMessenger.of(context)
                  .showSnackBar(const SnackBar(content: Text('More')));
            },
          )
        ],
      ),
      floatingActionButton: FloatingActionButton(
          onPressed: () => {print("deez")}, child: const Icon(Icons.add)),
      body: Container(
          padding: const EdgeInsets.symmetric(horizontal: 10.0),
          child: ListView.builder(
            itemCount: _schedule.length,
            itemBuilder: (context, index) {
              return Card(
                  elevation: 4.0,
                  margin: const EdgeInsets.symmetric(vertical: 5.0),
                  child: ListTile(
                    contentPadding: const EdgeInsets.symmetric(
                        vertical: 10.0, horizontal: 25.0),
                    leading: RichText(
                        textAlign: TextAlign.center,
                        text: TextSpan(children: <TextSpan>[
                          TextSpan(text: "เลขขบวน"),
                          TextSpan(text: "\n"),
                          TextSpan(
                              text: _schedule[index][1],
                              style: TextStyle(
                                  fontSize: 20, fontWeight: FontWeight.bold)),
                        ])),
                    title: Text(_schedule[index][2]),
                    subtitle: RichText(
                        text: TextSpan(
                      children: <TextSpan>[
                        TextSpan(text: "Arrival: "),
                        TextSpan(text: _schedule[index][8]),
                        TextSpan(text: "\n"),
                        TextSpan(text: "Departure: "),
                        TextSpan(text: _schedule[index][9])
                      ],
                    )),
                  ));
            },
          )),
    );
  }
}