PiliPlus/lib/utils/download.dart

import 'dart:typed_data';

import 'package:device_info_plus/device_info_plus.dart';
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:saver_gallery/saver_gallery.dart';
import 'dart:io';

class DownloadUtils {
  // 获取存储权限
  static Future<bool> requestStoragePer(BuildContext context) async {
    await Permission.storage.request();
    PermissionStatus status = await Permission.storage.status;
    if (status == PermissionStatus.denied ||
        status == PermissionStatus.permanentlyDenied) {
      if (!context.mounted) return false;
      await showDialog(
        context: context,
        builder: (context) {
          return AlertDialog(
            title: const Text('提示'),
            content: const Text('存储权限未授权'),
            actions: [
              TextButton(
                onPressed: () async {
                  openAppSettings();
                },
                child: const Text('去授权'),
              )
            ],
          );
        },
      );
      return false;
    } else {
      return true;
    }
  }

  // 获取相册权限
  static Future<bool> requestPhotoPer() async {
    await Permission.photos.request();
    PermissionStatus status = await Permission.photos.status;
    if (status == PermissionStatus.denied ||
        status == PermissionStatus.permanentlyDenied) {
      // SmartDialog.show(
      //   useSystem: true,
      //   animationType: SmartAnimationType.centerFade_otherSlide,
      //   builder: (BuildContext context) {
      //     return AlertDialog(
      //       title: const Text('提示'),
      //       content: const Text('相册权限未授权'),
      //       actions: [
      //         TextButton(
      //           onPressed: () async {
      //             openAppSettings();
      //           },
      //           child: const Text('去授权'),
      //         )
      //       ],
      //     );
      //   },
      // );
      return false;
    } else {
      return true;
    }
  }

  static Future<bool> checkPermissionDependOnSdkInt(
      BuildContext context) async {
    if (Platform.isAndroid) {
      final androidInfo = await DeviceInfoPlugin().androidInfo;
      if (androidInfo.version.sdkInt <= 32) {
        if (!context.mounted) return false;
        return await requestStoragePer(context);
      } else {
        return await requestPhotoPer();
      }
    }
    return await requestStoragePer(context);
  }

  static Future downloadImg(
    BuildContext context,
    List<String> imgList, {
    String imgType = 'cover',
  }) async {
    try {
      if (!await checkPermissionDependOnSdkInt(context)) {
        return;
      }
      Dio dio = Dio()
        ..options = BaseOptions(
          connectTimeout: const Duration(milliseconds: 10000),
          receiveTimeout: const Duration(milliseconds: 10000),
        );
      for (int i = 0; i < imgList.length; i++) {
        SmartDialog.showLoading(
            msg:
                '正在下载原图${imgList.length > 1 ? '${i + 1}/${imgList.length}' : ''}');
        var response = await dio.get(imgList[i],
            options: Options(responseType: ResponseType.bytes));
        String picName =
            "${imgType}_${DateTime.now().toString().replaceAll(' ', '_').replaceAll(':', '-').split('.').first}";
        final SaveResult result = await SaverGallery.saveImage(
          Uint8List.fromList(response.data),
          quality: 100,
          fileName: picName,
          // 保存到 PiliPalaX文件夹
          androidRelativePath: "Pictures/PiliPalaX",
          skipIfExists: false,
        );
        // SmartDialog.dismiss();
        // SmartDialog.showLoading(msg: '正在保存图片至图库');
        if (i == imgList.length - 1) {
          SmartDialog.dismiss();
        }
        if (result.isSuccess) {
          await SmartDialog.showToast('「$picName」已保存 ');
        } else {
          await SmartDialog.showToast('保存失败，${result.errorMessage}');
        }
      }
    } catch (err) {
      SmartDialog.dismiss();
      SmartDialog.showToast(err.toString());
    }
  }
}