Flutter图片选择插件hexa_image_picker的使用

Flutter 图片选择插件 hexa_image_picker 的使用

在使用标准 Flutter 图片选择器从相册中选择图片时，我发现无法访问 GPS 位置元数据。因此，我制作了这个插件作为特定用例的解决方案，通过避免 Android 图片选择器来保留位置元数据。

使用方法

以下是如何使用 hexa_image_picker 插件的示例代码：

import 'dart:io';
import 'package:device_info_plus/device_info_plus.dart';
import 'package:hexa_image_picker/hexa_image_picker.dart';
import 'package:image_picker/image_picker.dart';

Future<XFile?> _pickImage(ImageSource imageSource) async {
  bool useStandardImagePicker = true;

  // 如果是 Android 并且选择了相册来源
  if (Platform.isAndroid && imageSource == ImageSource.gallery) {
    DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
    AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;

    // 如果 Android 版本大于等于 33，则使用 hexa_image_picker
    if (androidInfo.version.sdkInt >= 33) {
      useStandardImagePicker = false;
    }
  }

  // 根据条件选择不同的图片选择器
  if (useStandardImagePicker) {
    ImagePicker _imagePicker = new ImagePicker();
    return await _imagePicker.pickImage(
        source: imageSource, imageQuality: 50, preferredCameraDevice: CameraDevice.rear);
  } else {
    HexaImagePicker _hexaImagePicker = new HexaImagePicker();
    return await _hexaImagePicker.pickImage();
  }
}

完整示例 Demo

以下是一个完整的示例，展示了如何在 Flutter 应用中使用 hexa_image_picker 插件：

import 'package:flutter/material.dart';
import 'dart:io';
import 'package:device_info_plus/device_info_plus.dart';
import 'package:hexa_image_picker/hexa_image_picker.dart';
import 'package:image_picker/image_picker.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('hexa_image_picker 示例')),
        body: Center(
          child: MyImagePicker(),
        ),
      ),
    );
  }
}

class MyImagePicker extends StatefulWidget {
  [@override](/user/override)
  _MyImagePickerState createState() => _MyImagePickerState();
}

class _MyImagePickerState extends State<MyImagePicker> {
  XFile? _pickedImage;

  Future<void> _pickFromGallery() async {
    XFile? pickedImage = await _pickImage(ImageSource.gallery);
    setState(() {
      _pickedImage = pickedImage;
    });
  }

  Future<XFile?> _pickImage(ImageSource imageSource) async {
    bool useStandardImagePicker = true;

    // 如果是 Android 并且选择了相册来源
    if (Platform.isAndroid && imageSource == ImageSource.gallery) {
      DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
      AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;

      // 如果 Android 版本大于等于 33，则使用 hexa_image_picker
      if (androidInfo.version.sdkInt >= 33) {
        useStandardImagePicker = false;
      }
    }

    // 根据条件选择不同的图片选择器
    if (useStandardImagePicker) {
      ImagePicker _imagePicker = new ImagePicker();
      return await _imagePicker.pickImage(
          source: imageSource, imageQuality: 50, preferredCameraDevice: CameraDevice.rear);
    } else {
      HexaImagePicker _hexaImagePicker = new HexaImagePicker();
      return await _hexaImagePicker.pickImage();
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        ElevatedButton(
          onPressed: _pickFromGallery,
          child: Text('从相册选择图片'),
        ),
        SizedBox(height: 20),
        if (_pickedImage != null)
          Image.file(
            File(_pickedImage!.path),
            height: 200,
          ),
      ],
    );
  }
}