feat(service): Add working database persistency

lib/main.dart

@@ -4,17 +4,32 @@ import 'package:anitrack/src/ui/bloc/navigation_bloc.dart';
 import 'package:anitrack/src/ui/constants.dart';
 import 'package:anitrack/src/ui/pages/anime_list.dart';
 import 'package:anitrack/src/ui/pages/anime_search.dart';
+import 'package:anitrack/src/service/database.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:get_it/get_it.dart';
 
-void main() {
+void main() async {
   final navKey = GlobalKey<NavigatorState>();
 
+  // Initialize the widgets binding for sqflite
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // Initialize the database
+  final database = DatabaseService();
+  await database.initialize();
+
+  // Register singletons
+  GetIt.I.registerSingleton<DatabaseService>(database);
   GetIt.I.registerSingleton<AnimeListBloc>(AnimeListBloc());
   GetIt.I.registerSingleton<AnimeSearchBloc>(AnimeSearchBloc());
   GetIt.I.registerSingleton<NavigationBloc>(NavigationBloc(navKey));
 
+  // Load animes
+  GetIt.I.get<AnimeListBloc>().add(
+    AnimesLoadedEvent(),
+  );
+  
   runApp(
     MultiBlocProvider(
       providers: [

lib/src/data/anime.dart

@@ -1,50 +1,64 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'anime.freezed.dart';
+part 'anime.g.dart';
+
 /// The watch state of an anime
 enum AnimeTrackingState {
-  watching,
-  completed,
-  planToWatch,
-  dropped,
+  watching,    // 0
+  completed,   // 1
+  planToWatch, // 2
+  dropped,     // 3
+}
+
+extension AnimeTrackStateExtension on AnimeTrackingState {
+  int toInteger() {
+    switch (this) {
+      case AnimeTrackingState.watching: return 0;
+      case AnimeTrackingState.completed: return 1;
+      case AnimeTrackingState.planToWatch: return 2;
+      case AnimeTrackingState.dropped: return 3;
+    }
+  }
+}
+
+class AnimeTrackingStateConverter implements JsonConverter<AnimeTrackingState, int> {
+  const AnimeTrackingStateConverter();
+
+  @override
+  AnimeTrackingState fromJson(int json) {
+    switch (json) {
+      case 0: return AnimeTrackingState.watching;
+      case 1: return AnimeTrackingState.completed;
+      case 2: return AnimeTrackingState.planToWatch;
+      case 3: return AnimeTrackingState.dropped;
+    }
+
+    return AnimeTrackingState.planToWatch;
+  }
+  
+  @override
+  int toJson(AnimeTrackingState state) => state.toInteger();
 }
 
 /// Data about a tracked anime
-class AnimeTrackingData {
-  const AnimeTrackingData(
-    this.id,
-    this.state,
-    this.title,
-    this.episodesWatched,
-    this.episodesTotal,
-    this.thumbnailUrl,
-  );
-
-  /// The ID of the anime
-  final String id;
-  
-  /// The state of the anime
-  final AnimeTrackingState state;
-
-  /// The title of the anime
-  final String title;
-  
-  /// Episodes in total.
-  final int? episodesTotal;
-
-  /// Episodes watched.
-  final int episodesWatched;
-
-  /// URL to the thumbnail/cover art for the anime.
-  final String thumbnailUrl;
-
-  AnimeTrackingData copyWith(
+@freezed
+class AnimeTrackingData with _$AnimeTrackingData{
+  factory AnimeTrackingData(
+    /// The ID of the anime
+    String id,
+    /// The state of the anime
+    @AnimeTrackingStateConverter() AnimeTrackingState state,
+    /// The title of the anime
+    String title,
+    /// Episodes in total.
     int episodesWatched,
-  ) {
-    return AnimeTrackingData(
-      id,
-      state,
-      title,
-      episodesWatched,
-      episodesTotal,
-      thumbnailUrl,
-    );
-  }
+    /// Episodes watched.
+    int? episodesTotal,
+    /// URL to the thumbnail/cover art for the anime.
+    String thumbnailUrl,
+  ) = _AnimeTrackingData;
+
+  /// JSON
+  factory AnimeTrackingData.fromJson(Map<String, dynamic> json) => _$AnimeTrackingDataFromJson(json);
 }

lib/src/data/anime.freezed.dart

@@ -0,0 +1,295 @@
+// coverage:ignore-file
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target
+
+part of 'anime.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#custom-getters-and-methods');
+
+AnimeTrackingData _$AnimeTrackingDataFromJson(Map<String, dynamic> json) {
+  return _AnimeTrackingData.fromJson(json);
+}
+
+/// @nodoc
+mixin _$AnimeTrackingData {
+  /// The ID of the anime
+  String get id => throw _privateConstructorUsedError;
+
+  /// The state of the anime
+  @AnimeTrackingStateConverter()
+  AnimeTrackingState get state => throw _privateConstructorUsedError;
+
+  /// The title of the anime
+  String get title => throw _privateConstructorUsedError;
+
+  /// Episodes in total.
+  int get episodesWatched => throw _privateConstructorUsedError;
+
+  /// Episodes watched.
+  int? get episodesTotal => throw _privateConstructorUsedError;
+
+  /// URL to the thumbnail/cover art for the anime.
+  String get thumbnailUrl => throw _privateConstructorUsedError;
+
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+  @JsonKey(ignore: true)
+  $AnimeTrackingDataCopyWith<AnimeTrackingData> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $AnimeTrackingDataCopyWith<$Res> {
+  factory $AnimeTrackingDataCopyWith(
+          AnimeTrackingData value, $Res Function(AnimeTrackingData) then) =
+      _$AnimeTrackingDataCopyWithImpl<$Res>;
+  $Res call(
+      {String id,
+      @AnimeTrackingStateConverter() AnimeTrackingState state,
+      String title,
+      int episodesWatched,
+      int? episodesTotal,
+      String thumbnailUrl});
+}
+
+/// @nodoc
+class _$AnimeTrackingDataCopyWithImpl<$Res>
+    implements $AnimeTrackingDataCopyWith<$Res> {
+  _$AnimeTrackingDataCopyWithImpl(this._value, this._then);
+
+  final AnimeTrackingData _value;
+  // ignore: unused_field
+  final $Res Function(AnimeTrackingData) _then;
+
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? state = freezed,
+    Object? title = freezed,
+    Object? episodesWatched = freezed,
+    Object? episodesTotal = freezed,
+    Object? thumbnailUrl = freezed,
+  }) {
+    return _then(_value.copyWith(
+      id: id == freezed
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      state: state == freezed
+          ? _value.state
+          : state // ignore: cast_nullable_to_non_nullable
+              as AnimeTrackingState,
+      title: title == freezed
+          ? _value.title
+          : title // ignore: cast_nullable_to_non_nullable
+              as String,
+      episodesWatched: episodesWatched == freezed
+          ? _value.episodesWatched
+          : episodesWatched // ignore: cast_nullable_to_non_nullable
+              as int,
+      episodesTotal: episodesTotal == freezed
+          ? _value.episodesTotal
+          : episodesTotal // ignore: cast_nullable_to_non_nullable
+              as int?,
+      thumbnailUrl: thumbnailUrl == freezed
+          ? _value.thumbnailUrl
+          : thumbnailUrl // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+abstract class _$$_AnimeTrackingDataCopyWith<$Res>
+    implements $AnimeTrackingDataCopyWith<$Res> {
+  factory _$$_AnimeTrackingDataCopyWith(_$_AnimeTrackingData value,
+          $Res Function(_$_AnimeTrackingData) then) =
+      __$$_AnimeTrackingDataCopyWithImpl<$Res>;
+  @override
+  $Res call(
+      {String id,
+      @AnimeTrackingStateConverter() AnimeTrackingState state,
+      String title,
+      int episodesWatched,
+      int? episodesTotal,
+      String thumbnailUrl});
+}
+
+/// @nodoc
+class __$$_AnimeTrackingDataCopyWithImpl<$Res>
+    extends _$AnimeTrackingDataCopyWithImpl<$Res>
+    implements _$$_AnimeTrackingDataCopyWith<$Res> {
+  __$$_AnimeTrackingDataCopyWithImpl(
+      _$_AnimeTrackingData _value, $Res Function(_$_AnimeTrackingData) _then)
+      : super(_value, (v) => _then(v as _$_AnimeTrackingData));
+
+  @override
+  _$_AnimeTrackingData get _value => super._value as _$_AnimeTrackingData;
+
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? state = freezed,
+    Object? title = freezed,
+    Object? episodesWatched = freezed,
+    Object? episodesTotal = freezed,
+    Object? thumbnailUrl = freezed,
+  }) {
+    return _then(_$_AnimeTrackingData(
+      id == freezed
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      state == freezed
+          ? _value.state
+          : state // ignore: cast_nullable_to_non_nullable
+              as AnimeTrackingState,
+      title == freezed
+          ? _value.title
+          : title // ignore: cast_nullable_to_non_nullable
+              as String,
+      episodesWatched == freezed
+          ? _value.episodesWatched
+          : episodesWatched // ignore: cast_nullable_to_non_nullable
+              as int,
+      episodesTotal == freezed
+          ? _value.episodesTotal
+          : episodesTotal // ignore: cast_nullable_to_non_nullable
+              as int?,
+      thumbnailUrl == freezed
+          ? _value.thumbnailUrl
+          : thumbnailUrl // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$_AnimeTrackingData implements _AnimeTrackingData {
+  _$_AnimeTrackingData(this.id, @AnimeTrackingStateConverter() this.state,
+      this.title, this.episodesWatched, this.episodesTotal, this.thumbnailUrl);
+
+  factory _$_AnimeTrackingData.fromJson(Map<String, dynamic> json) =>
+      _$$_AnimeTrackingDataFromJson(json);
+
+  /// The ID of the anime
+  @override
+  final String id;
+
+  /// The state of the anime
+  @override
+  @AnimeTrackingStateConverter()
+  final AnimeTrackingState state;
+
+  /// The title of the anime
+  @override
+  final String title;
+
+  /// Episodes in total.
+  @override
+  final int episodesWatched;
+
+  /// Episodes watched.
+  @override
+  final int? episodesTotal;
+
+  /// URL to the thumbnail/cover art for the anime.
+  @override
+  final String thumbnailUrl;
+
+  @override
+  String toString() {
+    return 'AnimeTrackingData(id: $id, state: $state, title: $title, episodesWatched: $episodesWatched, episodesTotal: $episodesTotal, thumbnailUrl: $thumbnailUrl)';
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$_AnimeTrackingData &&
+            const DeepCollectionEquality().equals(other.id, id) &&
+            const DeepCollectionEquality().equals(other.state, state) &&
+            const DeepCollectionEquality().equals(other.title, title) &&
+            const DeepCollectionEquality()
+                .equals(other.episodesWatched, episodesWatched) &&
+            const DeepCollectionEquality()
+                .equals(other.episodesTotal, episodesTotal) &&
+            const DeepCollectionEquality()
+                .equals(other.thumbnailUrl, thumbnailUrl));
+  }
+
+  @JsonKey(ignore: true)
+  @override
+  int get hashCode => Object.hash(
+      runtimeType,
+      const DeepCollectionEquality().hash(id),
+      const DeepCollectionEquality().hash(state),
+      const DeepCollectionEquality().hash(title),
+      const DeepCollectionEquality().hash(episodesWatched),
+      const DeepCollectionEquality().hash(episodesTotal),
+      const DeepCollectionEquality().hash(thumbnailUrl));
+
+  @JsonKey(ignore: true)
+  @override
+  _$$_AnimeTrackingDataCopyWith<_$_AnimeTrackingData> get copyWith =>
+      __$$_AnimeTrackingDataCopyWithImpl<_$_AnimeTrackingData>(
+          this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$_AnimeTrackingDataToJson(
+      this,
+    );
+  }
+}
+
+abstract class _AnimeTrackingData implements AnimeTrackingData {
+  factory _AnimeTrackingData(
+      final String id,
+      @AnimeTrackingStateConverter() final AnimeTrackingState state,
+      final String title,
+      final int episodesWatched,
+      final int? episodesTotal,
+      final String thumbnailUrl) = _$_AnimeTrackingData;
+
+  factory _AnimeTrackingData.fromJson(Map<String, dynamic> json) =
+      _$_AnimeTrackingData.fromJson;
+
+  @override
+
+  /// The ID of the anime
+  String get id;
+  @override
+
+  /// The state of the anime
+  @AnimeTrackingStateConverter()
+  AnimeTrackingState get state;
+  @override
+
+  /// The title of the anime
+  String get title;
+  @override
+
+  /// Episodes in total.
+  int get episodesWatched;
+  @override
+
+  /// Episodes watched.
+  int? get episodesTotal;
+  @override
+
+  /// URL to the thumbnail/cover art for the anime.
+  String get thumbnailUrl;
+  @override
+  @JsonKey(ignore: true)
+  _$$_AnimeTrackingDataCopyWith<_$_AnimeTrackingData> get copyWith =>
+      throw _privateConstructorUsedError;
+}

lib/src/data/anime.g.dart

@@ -0,0 +1,28 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'anime.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$_AnimeTrackingData _$$_AnimeTrackingDataFromJson(Map<String, dynamic> json) =>
+    _$_AnimeTrackingData(
+      json['id'] as String,
+      const AnimeTrackingStateConverter().fromJson(json['state'] as int),
+      json['title'] as String,
+      json['episodesWatched'] as int,
+      json['episodesTotal'] as int?,
+      json['thumbnailUrl'] as String,
+    );
+
+Map<String, dynamic> _$$_AnimeTrackingDataToJson(
+        _$_AnimeTrackingData instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'state': const AnimeTrackingStateConverter().toJson(instance.state),
+      'title': instance.title,
+      'episodesWatched': instance.episodesWatched,
+      'episodesTotal': instance.episodesTotal,
+      'thumbnailUrl': instance.thumbnailUrl,
+    };

lib/src/service/database.dart

@@ -0,0 +1,55 @@
+import 'package:anitrack/src/data/anime.dart';
+import 'package:sqflite/sqflite.dart';
+
+const animeTable = 'Anime';
+
+Future<void> _createDatabase(Database db, int version) async {
+  await db.execute(
+    '''
+    CREATE TABLE $animeTable(
+      id TEXT NOT NULL PRIMARY KEY,
+      state INTEGER NOT NULL,
+      episodesTotal INTEGER,
+      episodesWatched INTEGER NOT NULL,
+      thumbnailUrl TEXT NOT NULL,
+      title TEXT NOT NULL
+    )''',
+  );
+}
+
+class DatabaseService {
+  late final Database _db;
+
+  Future<void> initialize() async {
+    _db = await openDatabase(
+      'anitrack.db',
+      version: 1,
+      onCreate: _createDatabase,
+    );
+  }
+
+  Future<List<AnimeTrackingData>> loadAnimes() async {
+    final animes = await _db.query(animeTable);
+
+    return animes
+      .cast<Map<String, dynamic>>()
+      .map((Map<String, dynamic> anime) => AnimeTrackingData.fromJson(anime))
+      .toList();
+  }
+  
+  Future<void> addAnime(AnimeTrackingData data) async {
+    await _db.insert(
+      animeTable,
+      data.toJson(),
+    );
+  }
+
+  Future<void> updateAnime(AnimeTrackingData data) async {
+    await _db.update(
+      animeTable,
+      data.toJson(),
+      where: 'id = ?',
+      whereArgs: [data.id],
+    );
+  }
+}

lib/src/ui/bloc/anime_list_bloc.dart

@@ -1,7 +1,9 @@
 import 'dart:math';
 import 'package:anitrack/src/data/anime.dart';
+import 'package:anitrack/src/service/database.dart';
 import 'package:bloc/bloc.dart';
 import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:get_it/get_it.dart';
 
 part 'anime_list_state.dart';
 part 'anime_list_event.dart';
@@ -12,10 +14,13 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
     on<AnimeAddedEvent>(_onAnimeAdded);
     on<AnimeEpisodeIncrementedEvent>(_onIncremented);
     on<AnimeEpisodeDecrementedEvent>(_onDecremented);
+    on<AnimesLoadedEvent>(_onAnimesLoaded);
   }
 
-  // TODO: Remove
   Future<void> _onAnimeAdded(AnimeAddedEvent event, Emitter<AnimeListState> emit) async {
+    // Add the anime to the database
+    await GetIt.I.get<DatabaseService>().addAnime(event.data);
+
     emit(
       state.copyWith(
         animes: List.from([
@@ -34,16 +39,18 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
     if (anime.episodesTotal != null && anime.episodesWatched + 1 > anime.episodesTotal!) return;
 
     final newList = List<AnimeTrackingData>.from(state.animes);
-    newList[index] = anime.copyWith(
-      anime.episodesWatched + 1,
+    final newAnime = anime.copyWith(
+      episodesWatched: anime.episodesWatched + 1,
     );
+    newList[index] = newAnime;
 
     emit(
       state.copyWith(
         animes: newList,
       ),
     );
-    print('${event.id} incremented');
+
+    await GetIt.I.get<DatabaseService>().updateAnime(newAnime);
   }
 
   Future<void> _onDecremented(AnimeEpisodeDecrementedEvent event, Emitter<AnimeListState> emit) async {
@@ -54,15 +61,25 @@ class AnimeListBloc extends Bloc<AnimeListEvent, AnimeListState> {
     if (anime.episodesWatched - 1 < 0) return;
 
     final newList = List<AnimeTrackingData>.from(state.animes);
-    newList[index] = anime.copyWith(
-      anime.episodesWatched - 1,
+    final newAnime = anime.copyWith(
+      episodesWatched: anime.episodesWatched - 1,
     );
+    newList[index] = newAnime;
 
     emit(
       state.copyWith(
         animes: newList,
       ),
     );
-    print('${event.id} decremented');
+
+    await GetIt.I.get<DatabaseService>().updateAnime(newAnime);
+  }
+
+  Future<void> _onAnimesLoaded(AnimesLoadedEvent event, Emitter<AnimeListState> emit) async {
+    emit(
+      state.copyWith(
+        animes: await GetIt.I.get<DatabaseService>().loadAnimes(),
+      ),
+    );
   }
 }

lib/src/ui/bloc/anime_list_event.dart

@@ -22,3 +22,6 @@ class AnimeAddedEvent extends AnimeListEvent {
   /// The anime to add.
   final AnimeTrackingData data;
 }
+
+/// Triggered when animes are to be loaded from the database
+class AnimesLoadedEvent extends AnimeListEvent {}

lib/src/ui/pages/anime_search.dart

@@ -79,20 +79,27 @@ class AnimeSearchPage extends StatelessWidget {
                                   child: Column(
                                     mainAxisSize: MainAxisSize.min,
                                     children: [
-                                      Text(
-                                        item.title,
-                                        style: Theme.of(context).textTheme.titleLarge,
-                                        maxLines: 2,
-                                        softWrap: true,
-                                        overflow: TextOverflow.ellipsis,
+                                      Align(
+                                        alignment: Alignment.centerLeft,
+                                        child: Text(
+                                          item.title,
+                                          style: Theme.of(context).textTheme.titleLarge,
+                                          maxLines: 2,
+                                          softWrap: true,
+                                          overflow: TextOverflow.ellipsis,
+                                        ),
                                       ),
 
-                                      Text(
-                                        item.description,
-                                        style: Theme.of(context).textTheme.bodyMedium,
-                                        maxLines: 4,
-                                        softWrap: true,
-                                        overflow: TextOverflow.ellipsis,
+                                      Align(
+                                        alignment: Alignment.centerLeft,
+                                        child: Text(
+                                          item.description,
+                                          textAlign: TextAlign.justify,
+                                          style: Theme.of(context).textTheme.bodyMedium,
+                                          maxLines: 4,
+                                          softWrap: true,
+                                          overflow: TextOverflow.ellipsis,
+                                        ),
                                       ),
                                     ],
                                   ),

pubspec.lock

@@ -292,12 +292,19 @@ packages:
     source: hosted
     version: "0.6.5"
   json_annotation:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.8.0"
+    version: "4.6.0"
+  json_serializable:
+    dependency: "direct dev"
+    description:
+      name: json_serializable
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.3.2"
   lints:
     dependency: transitive
     description:
@@ -415,6 +422,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.7"
+  source_helper:
+    dependency: transitive
+    description:
+      name: source_helper
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.3"
   source_span:
     dependency: transitive
     description:
@@ -422,6 +436,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.9.0"
+  sqflite:
+    dependency: "direct main"
+    description:
+      name: sqflite
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.4+1"
+  sqflite_common:
+    dependency: transitive
+    description:
+      name: sqflite_common
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.2+2"
   stack_trace:
     dependency: transitive
     description:
@@ -457,6 +485,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.0+3"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
   term_glyph:
     dependency: transitive
     description:
@@ -515,4 +550,4 @@ packages:
     version: "3.1.1"
 sdks:
   dart: ">=2.18.4 <3.0.0"
-  flutter: ">=1.16.0"
+  flutter: ">=3.3.0"

pubspec.yaml

@@ -16,7 +16,8 @@ dependencies:
   freezed_annotation: 2.1.0
   get_it: ^7.2.0
   jikan_api: ^2.0.0
-
+  json_annotation: 4.6.0
+  sqflite: ^2.2.4+1
   swipeable_tile: ^2.0.0+3
 
 dev_dependencies:
@@ -25,6 +26,7 @@ dev_dependencies:
     sdk: flutter
   flutter_lints: ^2.0.0
   freezed: ^2.1.0+1
+  json_serializable: ^6.3.1
 
 flutter:
   uses-material-design: true