HiveDemo File

HiveDemo.dart

import 'package:flutter/material.dart';
import 'package:hive/hive.dart';
import 'package:hive_flutter/hive_flutter.dart';

class HiveDemo extends StatelessWidget {
  final TextEditingController controller = TextEditingController();
  final _nameBox = Hive.box("name");

  _saveNameAt(id) async {
    await _nameBox.put(id, controller.text);
    controller.text = "";
  }

  _deleteNameAt(id) async {
    await _nameBox.delete(id);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ValueListenableBuilder(
          valueListenable: _nameBox.listenable(),
          builder: (context, value, child) {
            var _id = "settings_name";
            var _name = _nameBox.get(_id) ?? "<No Name>";
            return Center(
              child: Padding(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    Text(
                      _name,
                      style: TextStyle(fontSize: 60),
                    ),
                    SizedBox(
                      height: 80,
                    ),
                    Container(
                      child: TextField(
                        controller: controller,
                        decoration: InputDecoration(
                          hintText: "Provide Name",
                        ),
                      ),
                    ),
                    FlatButton(
                      color: Colors.green,
                      onPressed: () => _saveNameAt(_id),
                      child: Text(
                        "Save Name",
                        style: TextStyle(color: Colors.white),
                      ),
                    ),
                    FlatButton(
                      color: Colors.red,
                      onPressed: () => _deleteNameAt(_id),
                      child: Text(
                        "Delete Name",
                        style: TextStyle(color: Colors.white),
                      ),
                    )
                  ],
                ),
              ),
            );
          }),
    );
  }
}