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[왕초보] 플러터(Flutter)로 시작하는 앱개발 종합반 v0
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스파르타 즉문즉답

main.dart

import 'package:flutter/material.dart';

import 'package:provider/provider.dart';

import 'book.dart';

import 'book_service.dart';


void main() {

  runApp(

    MultiProvider(

      providers: [

        ChangeNotifierProvider(create: (context) => BookService()),

      ],

      child: const MyApp(),

    ),

  );

}


class MyApp extends StatelessWidget {

  const MyApp({Key? key}) : super(key: key);


  @override

  Widget build(BuildContext context) {

    return MaterialApp(

      debugShowCheckedModeBanner: false,

      home: HomePage(),

    );

  }

}


class HomePage extends StatefulWidget {

  HomePage({Key? key}) : super(key: key);


  @override

  State<HomePage> createState() => _HomePageState();

}


class _HomePageState extends State<HomePage> {

  var bottomNavIndex = 0;

  @override

  Widget build(BuildContext context) {

    return Scaffold(

      body: [

        SearchPage(),

        LikedBookPage(),

      ].elementAt(bottomNavIndex),

      bottomNavigationBar: BottomNavigationBar(

        selectedItemColor: Colors.black,

        unselectedItemColor: Colors.grey,

        showUnselectedLabels: true,

        selectedFontSize: 12,

        unselectedFontSize: 12,

        iconSize: 28,

        type: BottomNavigationBarType.fixed,

        onTap: (value) {

          setState(() {

            bottomNavIndex = value;

          });

        },

        items: [

          BottomNavigationBarItem(

            icon: Icon(Icons.search),

            label: '검색',

          ),

          BottomNavigationBarItem(

            icon: Icon(Icons.star),

            label: '좋아요',

          ),

        ],

        currentIndex: bottomNavIndex,

      ),

    );

  }

}


class SearchPage extends StatelessWidget {

  SearchPage({super.key});


  @override

  Widget build(BuildContext context) {

    return Consumer<BookService>(

      builder: (context, bookService, child) {

        return Scaffold(

          appBar: AppBar(

            backgroundColor: Colors.white,

            toolbarHeight: 80,

            title: TextField(

              onSubmitted: (value) {

                bookService.search(value);

                print(value);

              },

              cursorColor: Colors.grey,

              decoration: InputDecoration(

                prefixIcon: Icon(Icons.search, color: Colors.grey),

                hintText: "작품, 감독, 배우, 컬렉션, 유저 등",

                border: OutlineInputBorder(

                  borderSide: BorderSide(color: Colors.white),

                  borderRadius: BorderRadius.all(Radius.circular(10)),

                ),

                focusedBorder: OutlineInputBorder(

                  borderSide: BorderSide(color: Colors.grey),

                  borderRadius: BorderRadius.all(Radius.circular(10)),

                ),

              ),

            ),

          ),

          body: Padding(

            padding: const EdgeInsets.symmetric(horizontal: 12),

            child: ListView.separated(

              itemCount: bookService.bookList.length,

              separatorBuilder: (context, index) {

                return Divider();

              },

              itemBuilder: (context, index) {

                Book book = bookService.bookList.elementAt(index);

                return ListTile(title: Text(book.title));

              },

            ),

          ),

        );

      },

    );

  }

}


class LikedBookPage extends StatelessWidget {

  const LikedBookPage({super.key});


  @override

  Widget build(BuildContext context) {

    return Scaffold(

      body: Center(

        child: Text("좋아요"),

      ),

    );

  }

}

book.dart

class Book {

  String id;

  String title;

  String subtitle;

  String thumbnail; // 썸네일 이미지 링크

  String previewLink; // ListTile 을 눌렀을 때 이동하는 링크


  Book({

    required this.id,

    required this.title,

    required this.subtitle,

    required this.thumbnail,

    required this.previewLink,

  });

}

book_service.dart

import 'package:dio/dio.dart';

import 'package:flutter/material.dart';


import 'book.dart';


class BookService extends ChangeNotifier {

  List<Book> bookList = []; // 책 목록


  void search(String q) async {

    bookList.clear(); // 검색 버튼 누를때 이전 데이터들을 지워주기


    if (q.isNotEmpty) {

      Response res = await Dio().get(

        "https://www.googleapis.com/books/v1/volumes?q=$q&startIndex=0&maxResults=40",

      );

      List items = res.data["items"];


      for (Map<String, dynamic> item in items) {

        Book book = Book(

          id: item['id'],

          title: item['volumeInfo']['title'] ?? "",

          subtitle: item['volumeInfo']['subtitle'] ?? "",

          thumbnail: item['volumeInfo']['imageLinks']?['thumbnail'] ??

              "https://thumbs.dreamstime.com/b/no-image-available-icon-flat-vector-no-image-available-icon-flat-vector-illustration-132482953.jpg",

          previewLink: item['volumeInfo']['previewLink'] ?? "",

        );

        bookList.add(book);

      }

    }

  }

}



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