pdf查看
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@@ -3,12 +3,14 @@ import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter_pdfview/flutter_pdfview.dart';
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import 'package:getx_scaffold/getx_scaffold.dart' as dio;
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import 'package:getx_scaffold/getx_scaffold.dart';
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import 'package:image_picker/image_picker.dart';
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import 'package:ln_jq_app/common/model/base_model.dart';
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import 'package:ln_jq_app/common/styles/theme.dart';
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import 'package:ln_jq_app/storage_service.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:photo_view/photo_view.dart';
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import 'package:photo_view/photo_view_gallery.dart';
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import 'package:pull_to_refresh/pull_to_refresh.dart';
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@@ -794,54 +796,83 @@ class SiteController extends GetxController with BaseControllerMixin {
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}
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/// 保存图片到相册
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Future<void> saveImageToLocal(String url) async {
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// 1. 权限请求
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if (Platform.isAndroid) {
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dio.PermissionStatus status;
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Future<void> saveFileToLocal(String url) async {
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try {
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// 权限请求
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if (Platform.isAndroid) {
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dio.PermissionStatus status;
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final deviceInfo = await DeviceInfoPlugin().androidInfo;
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final sdkInt = deviceInfo.version.sdkInt;
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final deviceInfo = await DeviceInfoPlugin().androidInfo;
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final sdkInt = deviceInfo.version.sdkInt;
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if (sdkInt <= 32) {
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status = await Permission.storage.request();
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if (sdkInt <= 32) {
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status = await Permission.storage.request();
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} else {
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status = await Permission.photos.request();
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}
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if (!status.isGranted) {
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showErrorToast("请在系统设置中开启存储权限");
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return;
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}
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} else {
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status = await Permission.photos.request();
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var status = await Permission.photos.request();
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if (!status.isGranted) {
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showErrorToast("请在系统设置中开启相册权限");
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return;
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}
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}
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if (!status.isGranted) {
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showErrorToast("请在系统设置中开启存储权限");
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return;
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showLoading("正在保存...");
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// 下载文件
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var response = await Dio().get(
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url,
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options: Options(responseType: ResponseType.bytes),
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);
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final Uint8List bytes = Uint8List.fromList(response.data);
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if (url.toLowerCase().endsWith('.pdf')) {
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String? savePath;
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if (Platform.isAndroid) {
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final directory = Directory('/storage/emulated/0/Download');
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if (!await directory.exists()) {
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await directory.create(recursive: true);
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}
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final String fileName = "certificate_${DateTime.now().millisecondsSinceEpoch}.pdf";
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savePath = "${directory.path}/$fileName";
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} else {
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// iOS: 保存到文档目录
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final directory = await getApplicationDocumentsDirectory();
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final String fileName = "certificate_${DateTime.now().millisecondsSinceEpoch}.pdf";
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savePath = "${directory.path}/$fileName";
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}
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final File file = File(savePath);
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await file.writeAsBytes(bytes);
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dismissLoading();
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showSuccessToast(Platform.isAndroid ? "PDF已保存至系统下载目录" : "PDF已保存，请在'文件'App中查看");
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} else {
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// 保存图片到相册
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final result = await SaverGallery.saveImage(
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bytes,
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quality: 100,
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fileName: "certificate_${DateTime.now().millisecondsSinceEpoch}",
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skipIfExists: false,
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);
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dismissLoading();
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if (result.isSuccess) {
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showSuccessToast("图片已保存至相册");
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} else {
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showErrorToast("保存失败");
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}
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}
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} else {
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var status = await Permission.photos.request();
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if (!status.isGranted) {
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showErrorToast("请在系统设置中开启相册权限");
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return;
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}
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}
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showLoading("正在保存...");
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// 2. 下载图片
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var response = await Dio().get(
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url,
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options: Options(responseType: ResponseType.bytes),
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);
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// 3. 保存到相册
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final result = await SaverGallery.saveImage(
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Uint8List.fromList(response.data),
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quality: 100,
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fileName: "certificate_${DateTime.now().millisecondsSinceEpoch}",
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skipIfExists: false,
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);
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dismissLoading();
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if (result.isSuccess) {
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showSuccessToast("图片已保存至相册");
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} else {
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showErrorToast("保存失败");
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} catch (e) {
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dismissLoading();
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showErrorToast("保存异常");
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}
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}
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@@ -888,12 +919,30 @@ class SiteController extends GetxController with BaseControllerMixin {
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child: PhotoViewGallery.builder(
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scrollPhysics: const BouncingScrollPhysics(),
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builder: (BuildContext context, int index) {
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final String url = images[index];
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final bool isPdf = url.toLowerCase().endsWith('.pdf');
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if (isPdf) {
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return PhotoViewGalleryPageOptions.customChild(
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child: GestureDetector(
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onTap: (){
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_showSaveMenu(url);
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},
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child: _buildPdfPreview(url),),
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initialScale: PhotoViewComputedScale.contained,
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heroAttributes: PhotoViewHeroAttributes(tag: url),
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onTapDown: (context, details, controllerValue) {
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_showSaveMenu(url);
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},
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);
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}
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return PhotoViewGalleryPageOptions(
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imageProvider: NetworkImage(images[index]),
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imageProvider: NetworkImage(url),
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initialScale: PhotoViewComputedScale.contained,
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heroAttributes: PhotoViewHeroAttributes(tag: images[index]),
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heroAttributes: PhotoViewHeroAttributes(tag: url),
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onTapDown: (context, details, controllerValue) {
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_showSaveImageMenu(images[index]);
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_showSaveMenu(url);
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},
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);
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},
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@@ -939,7 +988,38 @@ class SiteController extends GetxController with BaseControllerMixin {
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);
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}
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void _showSaveImageMenu(String url) {
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/// PDF 预览小部件
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Widget _buildPdfPreview(String url) {
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return FutureBuilder<String>(
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future: _downloadPdf(url),
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builder: (context, snapshot) {
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if (snapshot.connectionState == ConnectionState.waiting) {
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return const Center(child: CircularProgressIndicator(color: Colors.white));
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}
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if (snapshot.hasError || snapshot.data == null) {
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return const Center(child: Text("PDF 加载失败", style: TextStyle(color: Colors.white)));
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}
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return PDFView(
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filePath: snapshot.data!,
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enableSwipe: false,
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swipeHorizontal: false,
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autoSpacing: false,
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pageFling: false,
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);
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},
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);
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}
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Future<String> _downloadPdf(String url) async {
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final file = File('${(await getTemporaryDirectory()).path}/${url.hashCode}.pdf');
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if (await file.exists()) return file.path;
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var response = await Dio().get(url, options: Options(responseType: ResponseType.bytes));
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await file.writeAsBytes(response.data);
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return file.path;
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}
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void _showSaveMenu(String url) {
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final bool isPdf = url.toLowerCase().endsWith('.pdf');
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Get.bottomSheet(
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Container(
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color: Colors.white,
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@@ -949,10 +1029,10 @@ class SiteController extends GetxController with BaseControllerMixin {
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children: [
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ListTile(
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leading: const Icon(Icons.download),
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title: const Text('保存图片到相册'),
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title: Text(isPdf ? '保存 PDF 文件' : '保存图片到相册'),
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onTap: () {
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Get.back();
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saveImageToLocal(url);
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saveFileToLocal(url);
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},
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),
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const Divider(height: 1),
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