Dasturiy injiniring” yo’nalishi 652-19-guruh talabasi Abdullayev Olloyorning

Biz ValueListenableBuilder() ga filtr funksiyasini qo'shamiz va DataFilter yordamida tugmalarni xaritalashtiramiz.
if(filter == DataFilter.ALL){
keys = items.keys.cast().toList();
}else if(filter == DataFilter.COMPLETED){
keys = items.keys.cast().where((key) => items.get(key).complete).toList();
}else{
keys = items.keys.cast().where((key) => !items.get(key).complete).toList();
}

Ilovani ishga tushirganimizda, biz pastki video suratga olish kabi ekranning chiqishini olishimiz kerak.

Ushbu yakuniy video chiqishida siz TypeAdapter bilan Hive DataBase qanday ishlashini va flutter ilovalaringizdagi maʼlumotlarni oʻzgartirish uchun filtrlardan qanday foydalanishni koʻrasiz.

Kod fayli:

import 'package:flutter/material.dart';
import 'package:flutter_hive_database_demo/data_model.dart';
import 'package:hive/hive.dart';
import 'package:hive_flutter/hive_flutter.dart';
const String dataBoxName = "data";

class MyHomePage extends StatefulWidget {

@override

_MyHomePageState createState() => _MyHomePageState();
}

enum DataFilter {ALL, COMPLETED, PROGRESS}

class _MyHomePageState extends State {

Box dataBox;
final TextEditingController titleController = TextEditingController();
final TextEditingController descriptionController = TextEditingController();
DataFilter filter = DataFilter.ALL;

@override

void initState() {
// TODO: implement initState
super.initState();
dataBox = Hive.box(dataBoxName);
}

@override

Widget build(BuildContext context) {

return Scaffold(

appBar: AppBar(
automaticallyImplyLeading: false,
backgroundColor: Colors.black,
title: Text("Flutter Hive Demo"),
actions: [
PopupMenuButton(
onSelected: (value) {
if(value.compareTo("All") == 0){
setState(() {
filter = DataFilter.ALL;
});
}else if (value.compareTo("Compeleted") == 0){
setState(() {
filter = DataFilter.COMPLETED;
});
}else{
setState(() {
filter = DataFilter.PROGRESS;
});
}
},
itemBuilder: (BuildContext context) {
return ["All", "Compeleted", "Progress"].map((option) {
return PopupMenuItem(
value: option,
child: Text(option),
);
}).toList();
},
)
],
),

body: SingleChildScrollView(

child: Column(
children: [
ValueListenableBuilder(
valueListenable: dataBox.listenable(),

builder: (context, Box items, _){

List keys;

if(filter == DataFilter.ALL){

keys = items.keys.cast().toList();
}else if(filter == DataFilter.COMPLETED){
keys = items.keys.cast().where((key) => items.get(key).complete).toList();
}else{
keys = items.keys.cast().where((key) => !items.get(key).complete).toList();
}

return ListView.separated(

separatorBuilder: (_, index) => Divider(),
itemCount: keys.length,
shrinkWrap: true,
scrollDirection: Axis.vertical,
physics: NeverScrollableScrollPhysics(),
itemBuilder:(_, index){
final int key = keys[index];
final DataModel data = items.get(key);
return Card(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15.0),
),
color: Colors.blueGrey[200],
child: ListTile(
title: Text(data.title, style: TextStyle(fontSize: 22,color: Colors.black),),
subtitle: Text(data.description,style: TextStyle(fontSize: 20,color:Colors.black38)),
leading: Text("$key", style: TextStyle(fontSize: 18,color: Colors.black),),
trailing: Icon(Icons.check, color: data.complete ? Colors.deepPurpleAccent : Colors.red,),
onTap: (){
showDialog(
context: context,
child: Dialog(
backgroundColor: Colors.white,
child: Container(
padding: EdgeInsets.all(16),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
FlatButton(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0),
),
color: Colors.blueAccent[100],
child: Text("Mark as complete",style: TextStyle(color: Colors.black87),),
onPressed: () {
DataModel mData = DataModel(
title: data.title,
description: data.description,
complete: true
);
dataBox.put(key, mData);
Navigator.pop(context);
},
)
],
),
)
)
);
},
),
);
},

);
},

),
SizedBox(height: 20,)
],
),
),

floatingActionButton: FloatingActionButton(

onPressed: (){
showDialog(
context: context,
child: Dialog(

backgroundColor: Colors.blueGrey[100],

child: Container(
padding: EdgeInsets.all(16),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
TextField(
decoration: InputDecoration(hintText: "Title"),
controller: titleController,
),
SizedBox(
height: 8,
),
TextField(
decoration: InputDecoration(hintText: "Description"),
controller: descriptionController,
),
SizedBox(
height: 8,
),
FlatButton(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0),
),
color: Colors.red,
child: Text("Add Data",style: TextStyle(color: Colors.white),),
onPressed: () {
final String title = titleController.text;
final String description = descriptionController.text;
titleController.clear();
descriptionController.clear();
DataModel data = DataModel(title: title, description: description, complete: false);
dataBox.add(data);
Navigator.pop(context);

},
)

],
),
)
)
);
},
child: Icon(Icons.add),
),
);
}
}

Xulosa:

Men Hive DataBase ning asosiy tuzilishini tushuntirdim. Bu men tomondan Hive On User Interaction yordamida TypeAdapter bilan Hive DataBase-ga kichik kirish edi va u Flutter yordamida ishlaydi.Umid qilamanki, bu blog sizga flutter loyihalaringizda TypeAdapter yordamida Hive DataBase- ni sinab ko'rish bo'limida yetarlicha ma'lumot beradi . Biz sizga uya nima ekanligini ko'rsatamiz, TypeAdapter ismi? va flutter ilovalaringizda uyadan foydalangan holda tip adapteri bilan uya ma'lumotlar bazasida ishlaymiz, shuning uchun uni sinab ko'ring.