3강

import 'package:flutter/material.dart';
import 'package:image_search/model/Photo.dart';
import 'package:image_search/ui/photo_widget.dart';
import 'package:http/http.dart' as http;

class HomeScreen extends StatefulWidget {
  const HomeScreen({Key? key}) : super(key: key);

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  final _controller = TextEditingController();

  List<Photo> _photos = [];

  Future<List<Photo>> fetch(String query) async {
    final response = await http.get(Uri.parse(
        'https://pixabay.com/api/?key=27171919-dd7273ea4c33cde4e8cbd583f&q=$query&image_type=photo'));

    Map<String, dynamic> jsonResponse = jsonDecode(response.body);

    Iterable hits = jsonResponse['hits'];
    return hits.map((e) => Photo.fromJson(e)).toList();
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        centerTitle: true,
        title: const Text(
          '이미지 검색 앱',
          style: TextStyle(color: Colors.black),
        ),
        backgroundColor: Colors.white,
        elevation: 0.0,
      ),
      body: Column(
        children: [
          Padding(
            padding: const EdgeInsets.all(16.0),
            child: TextField(
              controller: _controller,
              decoration: InputDecoration(
                border: const OutlineInputBorder(
                  borderRadius: BorderRadius.all(Radius.circular(10.0)),
                ),
                suffixIcon: IconButton(
                  onPressed: () async {
                    final photos = await fetch(_controller.text);

                    setState(() {
                      _photos = photos;
                    });
                  },
                  icon: const Icon(Icons.search),
                ),
              ),
            ),
          ),
          Expanded(
            child: GridView.builder(
              padding: const EdgeInsets.all(16.0),
              itemCount: _photos.length,
              gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
                crossAxisCount: 2,
                crossAxisSpacing: 16,
                mainAxisSpacing: 16,
              ),
              itemBuilder: (context, index) {
                final photo = _photos[index];
                return PhotoWidget(
                  photo: photo, <-- 이부분의 photo에서 에러가 발생
                );
              },
            ),
          )
        ],
      ),
    );
  }
}

import 'package:flutter/material.dart';
import 'package:image_search/model/photo.dart';

class PhotoWidget extends StatelessWidget {
  final Photo photo;

  const PhotoWidget({
    Key? key,
    required this.photo,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        borderRadius: const BorderRadius.all(Radius.circular(16.0)),
        image: DecorationImage(
          fit: BoxFit.cover,
          image: NetworkImage(photo.previewURL!), <-- 이렇게 변경 함
        ),
      ),
    );
  }
}