Flutter原生相机功能插件native_camera的使用

Flutter原生相机功能插件native_camera的使用

特性

native_camera 插件允许用户通过硬件相机或图库选择图片或视频，并指定选项。

开始使用

在开始使用 native_camera 插件之前，请确保已经设置了 camera 和 image_picker。具体步骤可以参考官方文档。

使用方法

首先，你需要导入 native_camera 包：

import 'package:native_camera/native_camera.dart';

然后，你可以使用 NativeCamera.launch 方法来启动相机或图库，具体代码如下：

final CameraFile? picked = await NativeCamera.launch(
  context,
  allowGallery: true, // 是否允许从图库选择
  cameraMode: CameraMode.both, // 模式（相机模式和视频模式）
);

示例代码

以下是一个完整的示例代码，展示了如何使用 native_camera 插件来选择图片和视频。

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

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

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

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  [@override](/user/override)
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  CameraFile? pickedFile;

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text(pickedFile?.toString() ?? ''), // 显示选中的文件信息
            ElevatedButton(
              onPressed: () async {
                final CameraFile? result = await NativeCamera.launch(
                  context,
                  allowGallery: false,
                  cameraMode: CameraMode.both,
                );
                setState(() {
                  pickedFile = result;
                });
              },
              child: const Text('允许相机模式：CameraMode.both'),
            ),
            ElevatedButton(
              onPressed: () async {
                final CameraFile? result = await NativeCamera.launch(
                  context,
                  allowGallery: false,
                  cameraMode: CameraMode.video,
                );
                setState(() {
                  pickedFile = result;
                });
              },
              child: const Text('允许相机模式：CameraMode.video'),
            ),
            ElevatedButton(
              onPressed: () async {
                final CameraFile? result = await NativeCamera.launch(
                  context,
                  allowGallery: false,
                  cameraMode: CameraMode.photo,
                );
                setState(() {
                  pickedFile = result;
                });
              },
              child: const Text('允许相机模式：CameraMode.photo'),
            ),
            ElevatedButton(
              onPressed: () async {
                final CameraFile? result = await NativeCamera.launch(
                  context,
                  allowGallery: true,
                  cameraMode: CameraMode.both,
                );
                setState(() {
                  pickedFile = result;
                });
              },
              child: const Text('允许图库模式：CameraMode.both'),
            ),
            ElevatedButton(
              onPressed: () async {
                final CameraFile? result = await NativeCamera.launch(
                  context,
                  allowGallery: true,
                  cameraMode: CameraMode.video,
                );
                setState(() {
                  pickedFile = result;
                });
              },
              child: const Text('允许图库模式：CameraMode.video'),
            ),
            ElevatedButton(
              onPressed: () async {
                final CameraFile? result = await NativeCamera.launch(
                  context,
                  allowGallery: true,
                  cameraMode: CameraMode.photo,
                );
                setState(() {
                  pickedFile = result;
                });
              },
              child: const Text('允许图库模式：CameraMode.photo'),
            ),
          ],
        ),
      ),
    );
  }
}