Hivedb Example #

This is an example of using Hivedb to store and query data in a Flutter application.

First, you will need to add the hive and hive_flutter dependencies to your pubspec.yaml file:

dependencies:
  flutter:
    sdk: flutter
  hive: ^2.0.4
  hive_flutter: ^1.1.0

Then, you can create a Hive database and a box to store your data. For this example, we will create a Task class and a tasks box:

import 'package:hive/hive.dart';

part 'task.g.dart';

@HiveType(typeId: 0)
class Task {
  @HiveField(0)
  String name;

  @HiveField(1)
  bool isDone;

  Task({required this.name, this.isDone = false});
}

Note that we are using the @HiveType and @HiveField annotations to define the Task class and its fields.

To create the Hive database and box, you can use the following code:

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

Future<void> main() async {
  await Hive.initFlutter();
  Hive.registerAdapter(TaskAdapter());
  await Hive.openBox<Task>('tasks');
}

Here, we are initializing Hive for Flutter, registering the TaskAdapter to serialize and deserialize the Task class, and opening a tasks box to store our tasks.

Now, you can add, retrieve, and delete tasks from the tasks box using the following methods:

import 'package:hive/hive.dart';

Future<void> addTask(String name) async {
  final box = Hive.box<Task>('tasks');
  await box.add(Task(name: name));
}

List<Task> getTasks() {
  final box = Hive.box<Task>('tasks');
  return box.values.toList();
}

Future<void> deleteTask(Task task) async {
  final box = Hive.box<Task>('tasks');
  await box.delete(task.key);
}

Here, we are using the Hive.box method to access the tasks box, and using the add, values, and delete methods to add, retrieve, and delete tasks.

That’s a basic example of using Hivedb to store and query data in Flutter. Of course, you can customize this code to fit your specific use case.