hive_tut all

main.dart

import 'package:flutter/foundation.dart' show kIsWeb;
import 'package:flutter/material.dart';
import 'package:hive/hive.dart';
import 'package:hive_flutter/hive_flutter.dart';
import 'package:path_provider/path_provider.dart';

String someRandomName = "someRandomName";

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  if (kIsWeb) {
    Hive.initFlutter();
  } else {
    // getting the path of the document in the device for accesing the database
    final document = await getApplicationDocumentsDirectory();
    Hive.init(document.path);
  }

  await Hive.openBox<String>(someRandomName);

  runApp(MyApp());
}

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

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

  @override
  _HiveSaverState createState() => _HiveSaverState();
}

class _HiveSaverState extends State<HiveSaver> {
  TextEditingController _textEditingController = new TextEditingController();
  @override
  Widget build(BuildContext context) {
    final width = MediaQuery.of(context).size.width;
    return Scaffold(
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Container(
            margin: EdgeInsets.symmetric(horizontal: width * 0.25),
            child: TextField(
              controller: _textEditingController,
            ),
          ),
          MyBottom(
            title: "Save your name and move on .",
            function: () {
              Box simpleBox = Hive.box<String>(someRandomName);
              simpleBox.put('name', _textEditingController.text);
              Navigator.push(context, MaterialPageRoute(
                builder: (context) {
                  return HiveLoader();
                },
              ));
            },
          )
        ],
      ),
    );
  }
}

class HiveLoader extends StatelessWidget {
  const HiveLoader({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    Box simpleBox = Hive.box<String>(someRandomName);
    String name = simpleBox.get('name');
    return Scaffold(
        body: Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Text("Good job $name :) ."),
          MyBottom(
              function: () {
                Navigator.pop(context);
              },
              title: "Go back !")
        ],
      ),
    ));
  }
}

class MyBottom extends StatelessWidget {
  final void Function() function;
  final String title;
  const MyBottom({
    Key? key,
    required this.function,
    required this.title,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return InkWell(
      onTap: function,
      child: Container(
          padding: EdgeInsets.all(10),
          margin: EdgeInsets.only(top: 10),
          decoration: BoxDecoration(
              color: Colors.black38,
              borderRadius: BorderRadius.all(Radius.circular(20))),
          child: Text(title)),
    );
  }
}