main.dart sample time zone flutter

main.dart

import 'package:flutter/services.dart';
import 'package:timezone/data/latest.dart' as tz;
import 'package:timezone/timezone.dart' as tz;
import 'package:flutter/material.dart';

void main() {
  /// Initialization time zones
  tz.initializeTimeZones();

  runApp(App());
}

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomeApp(),
    );
  }
}

class HomeApp extends StatefulWidget {
  @override
  _HomeAppState createState() => _HomeAppState();
}

class _HomeAppState extends State<HomeApp> {
  final methodChannel = MethodChannel('sample_time_zone_flutter_channel');

  var eventTimeInMillis = 0;
  var strEventTime = 'No Event';
  var timezone = '';
  var strGmtOffset = '';
  tz.Location timezoneLocation;

  @override
  void initState() {
    WidgetsBinding.instance.addPostFrameCallback((_) async {
      // TODO: buat fungsi untuk mengambil time zone di device
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Timezone'),
      ),
      body: Column(
        mainAxisSize: MainAxisSize.max,
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Center(
            child: Text(
              strEventTime,
              style: Theme.of(context).textTheme.headline6,
            ),
          ),
          Center(
            child: Text(
              '$timezone ($strGmtOffset)',
              style: Theme.of(context).textTheme.caption,
            ),
          ),
          SizedBox(height: 16),
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              RaisedButton(
                child: Text('Set Timezone'),
                onPressed: () async {
                  // TODO: arahkan ke halaman set timezone
                },
              ),
              SizedBox(width: 16),
              RaisedButton(
                child: Text('Set Event'),
                onPressed: () async {
                  // TODO: buat fungsi set event
                },
              ),
            ],
          ),
        ],
      ),
    );
  }
}