[Flutter] 카메라 제어하기

1. 기본 설정

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- 쓰기권한부여 -->

....
</manifest>

2. 사진 촬영, 저장 어플 만들기

import 'package:flutter/material.dart';
import 'package:gallery_saver/gallery_saver.dart';
import 'package:image_picker/image_picker.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Column(
          children: [
            Expanded(
              child: Center(
                child: Text(
                  "사진 저장하기",
                  style: TextStyle(fontSize: 50.0),
                ),
              ),
            ),
            Row(
              children: [
                IconButton(
                  onPressed: () {
                    _takePhoto();
                  },
                  icon: Icon(Icons.camera_alt_outlined),
                  iconSize: 50.0,
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }

  void _takePhoto() async {
    ImagePicker().pickImage(source: ImageSource.camera).then((value) {
      if (value != null && value.path != null) {
        print("저장경로 : ${value.path}");

        GallerySaver.saveImage(value.path).then((value) {
          print("사진이 저장되었습니다.");
        },);
      }
    },);
  }
}

3. 사진 촬영 저장 및 불러오기 어플 만들기

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <!-- 쓰기권한부여 -->
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <!-- 읽기권한부여 -->

....
</manifest>

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:gallery_saver/gallery_saver.dart';
import 'package:image_picker/image_picker.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  File? _selectedImage;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Column(
          children: [
            Expanded(
              child: Center(
                child: Text(
                  "사진 저장하기",
                  style: TextStyle(fontSize: 50.0),
                ),
              ),
            ),
            Container(
              child: _selectedImage != null
                  ? Image.file(_selectedImage!)
                  : Text("사진 없음"),
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                IconButton(
                  onPressed: _takePhoto,
                  icon: Icon(Icons.camera_alt_outlined),
                  iconSize: 50.0,
                ),
                IconButton(
                  onPressed: _pickImageFromGallery,
                  icon: Icon(Icons.image_outlined),
                  iconSize: 50.0,
                )
              ],
            ),
          ],
        ),
      ),
    );
  }

  void _takePhoto() async {
    final pickedImage =
        await ImagePicker().pickImage(source: ImageSource.camera);
    if (pickedImage != null) {
      setState(() {
        _selectedImage = File(pickedImage.path);
      });
      GallerySaver.saveImage(pickedImage.path).then(
        (bool? success) {
          print(success == true ? "사진이 저장되었습니다." : "사진 저장 오류");
        },
      );
    }
  }

  void _pickImageFromGallery() async {
    final pickedImage =
        await ImagePicker().pickImage(source: ImageSource.gallery);
    if (pickedImage != null) {
      setState(() {
        _selectedImage = File(pickedImage.path);
      });
    }
  }
}