如何解决重新打开后,Flutter 应用程序出现 Hive DB 问题
我在我的应用程序中使用 hive DB,当我第一次运行我的代码时一切都很好(我可以添加主类别,我可以添加子类别),但是在关闭并打开我的应用程序后,我可以看到我之前保存的所有类我关闭了该应用程序,但是当我在重新打开应用程序后尝试添加新类别时,该应用程序会在我添加的新类别中显示第一个类别的项目。为什么我的应用在关闭并再次打开时出现问题。感谢您的帮助
@override
Widget build(BuildContext context) {
return WillPopScope(
child: SafeArea(
child: Scaffold(
backgroundColor: kColorTheme1,appBar: AppBar(
centerTitle: true,automaticallyImplyLeading: false,elevation: 20,backgroundColor: Color(0xFFF2C3D4).withOpacity(1),title:TitleBorderedText(title:"Sevimli Yemekler",textColor: Color(0xFFFFFB00)),actions: [
CircleAvatar(
radius: 27,backgroundColor: Colors.transparent,backgroundImage: Assetimage(kCuttedlogoPath),),],body: Container(
decoration: Boxdecoration(
image: decorationImage(
image: Assetimage(kBGWithlogoOpacity),fit: BoxFit.cover,child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,children: [
Expanded(
child:GridView.builder (
scrollDirection: Axis.vertical,gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2),itemCount: _categoryModelsBox.length+1,itemBuilder: (context,index) {
if(_categoryModelsBox.length==0){
return EmptyCard(where: "homeScreen",);
}
if(_flag==1){
return EmptyCard(where: "homeScreen",);
}
if(index==_categoryModelsBox.length-1){
_flag=1;
CategoryModel categoryModel = _categoryModelsBox.getAt(index);
return CategoryCard(category: categoryModel);
}
else{
CategoryModel categoryModel = _categoryModelsBox.getAt(index);
return CategoryCard(category: categoryModel);
}
}
),Column(
mainAxisAlignment: MainAxisAlignment.end,crossAxisAlignment: CrossAxisAlignment.stretch,children: [
Padding(
padding: EdgeInsets.all(10),child: Container(
decoration: Boxdecoration(
border: Border.all(style: BorderStyle.solid),color: kColorTheme7,borderRadius: BorderRadius.circular(40),child: TextButton(
onpressed: (){
showModalBottomSheet(
isdismissible: false,enableDrag: false,context: context,builder: (BuildContext context)=> AddMenuScreen(buttonText: "Menü Ekle",route: "homeScreen",);
},child: TitleBorderedText(title: "LEZZET GRUBU EKLE",textColor: Colors.white,)
),)
],)
),onWillPop: ()async{
var response = await showAlertDialog(context);
print(response);
return response;
},);
}
}
import 'package:hive/hive.dart';
import 'package:lezzet_kitabi/subCategoryModel.dart';
part 'categoryModel.g.dart';
@HiveType(typeId : 0)
class CategoryModel extends HiveObject{
CategoryModel(
{ this.categoryId,this.categoryImagePath,this.categoryName,this.categoryColor,this.subCategoryModels});
@HiveField(0)
final int categoryColor;
@HiveField(1)
List <SubCategoryModel> subCategoryModels;
@HiveField(2)
int categoryId;
@HiveField(3)
String categoryImagePath;
@HiveField(4)
String categoryName;
}
// GENERATED CODE - DO NOT MODIFY BY HAND
part of 'categoryModel.dart';
// **************************************************************************
// TypeAdapterGenerator
// **************************************************************************
class CategoryModelAdapter extends TypeAdapter<CategoryModel> {
@override
final int typeId = 0;
@override
CategoryModel read(BinaryReader reader) {
final numOfFields = reader.readByte();
final fields = <int,dynamic>{
for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),};
return CategoryModel(
categoryId: fields[2] as int,categoryImagePath: fields[3] as String,categoryName: fields[4] as String,categoryColor: fields[0] as int,subCategoryModels: (fields[1] as List)?.cast<SubCategoryModel>(),);
}
@override
void write(BinaryWriter writer,CategoryModel obj) {
writer
..writeByte(5)
..writeByte(0)
..write(obj.categoryColor)
..writeByte(1)
..write(obj.subCategoryModels)
..writeByte(2)
..write(obj.categoryId)
..writeByte(3)
..write(obj.categoryImagePath)
..writeByte(4)
..write(obj.categoryName);
}
@override
int get hashCode => typeId.hashCode;
@override
bool operator ==(Object other) =>
identical(this,other) ||
other is CategoryModelAdapter &&
runtimeType == other.runtimeType &&
typeId == other.typeId;
}
void main() async{
WidgetsFlutterBinding.ensureInitialized();
Directory document = await getApplicationDocumentsDirectory();
Hive
..init(document.path)
..registeradapter(CategoryModelAdapter())
..registeradapter(SubCategoryModelAdapter())
..registeradapter(IngredientAdapter());
await Hive.openBox<CategoryModel>('categoryModelsInBox');
SystemChrome.setPreferredOrientations(
[DeviceOrientation.portraitUp,DeviceOrientation.portraitDown]);
runApp(MyApp());
}
class LocalStorageService {
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MultiProvider(
providers: [
ChangeNotifierProvider.value(value: IngredientsProvider()),ChangeNotifierProvider.value(value: CompletedPageInfoProvider()),child: MaterialApp(
debugShowCheckedModeBanner: false,initialRoute: WelcomeScreen.id,routes: {
SubCategoriesScreen.id:(context)=>SubCategoriesScreen(),AddMenuScreen.id:(context)=>AddMenuScreen(),WelcomeScreen.id:(context)=>WelcomeScreen(),HomeScreen.id:(context)=>HomeScreen(),RecipeScreen.id:(context)=>RecipeScreen(),CompletedRecipeScreen.id:(context)=>CompletedRecipeScreen()
},);
}
}
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