Flutter中调用相机拍照、选择相册图片（视频）_flutter opencv_4 选择相册扫描

image_picker插件实现

导入插件

image_picker: ^0.6.7+12		# 最新版本请在pub.dev中查看
1

平台配置

Android

• Android SDK 29+
  不需要配置
• Android SDK < 29
  修改AndroidManifest.xml文件

  <!-- 在application标签上添加 android:requestLegacyExternalStorage="true" -->
  <application android:requestLegacyExternalStorage="true"></application>
  1
  2

  <!-- 在application标签后添加权限设置 -->
  <uses-permission android:name="android.permission.CAMERA" />
  1
  2

IOS

在info.plist中添加配置
NSPhotoLibraryUsageDescription
NSCameraUsageDescription
NSMicrophoneUsageDescription

使用

import 'dart:io';

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  File _image;
  final picker = ImagePicker();

  Future getImage() async {
    final pickedFile = await picker.getImage(source: ImageSource.camera);

    setState(() {
      if (pickedFile != null) {
        _image = File(pickedFile.path);
      } else {
        print('No image selected.');
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Image Picker Example'),
      ),
      body: Center(
        child: _image == null
            ? Text('No image selected.')
            : Image.file(_image),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: getImage,
        tooltip: 'Pick Image',
        child: Icon(Icons.add_a_photo),
      ),
    );
  }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56