feat: 应用内缓存清理

lib/pages/about/index.dart

@@ -7,6 +7,7 @@ import 'package:pilipala/http/index.dart';
 import 'package:pilipala/models/github/latest.dart';
 import 'package:pilipala/utils/utils.dart';
 import 'package:url_launcher/url_launcher.dart';
+import '../../utils/cache_manage.dart';
 
 class AboutPage extends StatefulWidget {
   const AboutPage({super.key});
@@ -17,6 +18,19 @@ class AboutPage extends StatefulWidget {
 
 class _AboutPageState extends State<AboutPage> {
   final AboutController _aboutController = Get.put(AboutController());
+  String cacheSize = '';
+
+  @override
+  void initState() {
+    super.initState();
+    // 读取缓存占用
+    getCacheSize();
+  }
+
+  Future<void> getCacheSize() async {
+    final res = await CacheManage().loadApplicationCache();
+    setState(() => cacheSize = res);
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -138,6 +152,17 @@ class _AboutPageState extends State<AboutPage> {
               title: const Text('错误日志'),
               trailing: Icon(Icons.arrow_forward_ios, size: 16, color: outline),
             ),
+            ListTile(
+              onTap: () async {
+                var cleanStatus = await CacheManage().clearCacheAll();
+                if (cleanStatus) {
+                  getCacheSize();
+                }
+              },
+              title: const Text('清除缓存'),
+              subtitle: Text('图片及网络缓存 $cacheSize', style: subTitleStyle),
+              trailing: Icon(Icons.arrow_forward_ios, size: 16, color: outline),
+            ),
           ],
         ),
       ),

lib/utils/cache_manage.dart

@@ -0,0 +1,154 @@
+import 'dart:async';
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
+
+class CacheManage {
+  CacheManage._internal();
+
+  static final CacheManage cacheManage = CacheManage._internal();
+
+  factory CacheManage() => cacheManage;
+
+  // 获取缓存目录
+  Future<String> loadApplicationCache() async {
+    /// clear all of image in memory
+    // clearMemoryImageCache();
+    /// get ImageCache
+    // var res = getMemoryImageCache();
+
+    // 缓存大小
+    double cacheSize = 0;
+    // cached_network_image directory
+    Directory tempDirectory = await getTemporaryDirectory();
+    // get_storage directory
+    Directory docDirectory = await getApplicationDocumentsDirectory();
+
+    // 获取缓存大小
+    if (tempDirectory.existsSync()) {
+      double value = await getTotalSizeOfFilesInDir(tempDirectory);
+      cacheSize += value;
+    }
+
+    /// 获取缓存大小 dioCache
+    if (docDirectory.existsSync()) {
+      double value = 0;
+      String dioCacheFileName =
+          '${docDirectory.path}${Platform.pathSeparator}DioCache.db';
+      var dioCacheFile = File(dioCacheFileName);
+      if (dioCacheFile.existsSync()) {
+        value = await getTotalSizeOfFilesInDir(dioCacheFile);
+      }
+      cacheSize += value;
+    }
+
+    return formatSize(cacheSize);
+  }
+
+  // 循环计算文件的大小（递归）
+  Future<double> getTotalSizeOfFilesInDir(final FileSystemEntity file) async {
+    if (file is File) {
+      int length = await file.length();
+      return double.parse(length.toString());
+    }
+    if (file is Directory) {
+      final List<FileSystemEntity> children = file.listSync();
+      double total = 0;
+      for (final FileSystemEntity child in children) {
+        total += await getTotalSizeOfFilesInDir(child);
+      }
+      return total;
+    }
+    return 0;
+  }
+
+  // 缓存大小格式转换
+  String formatSize(double value) {
+    List<String> unitArr = ['B', 'K', 'M', 'G'];
+    int index = 0;
+    while (value > 1024) {
+      index++;
+      value = value / 1024;
+    }
+    String size = value.toStringAsFixed(2);
+    return size + unitArr[index];
+  }
+
+  // 清除缓存
+  Future<bool> clearCacheAll() async {
+    bool cleanStatus = await SmartDialog.show(
+      useSystem: true,
+      animationType: SmartAnimationType.centerFade_otherSlide,
+      builder: (BuildContext context) {
+        return AlertDialog(
+          title: const Text('提示'),
+          content: const Text('该操作将清除图片及网络请求缓存数据，确认清除？'),
+          actions: [
+            TextButton(
+              onPressed: (() => {SmartDialog.dismiss()}),
+              child: Text(
+                '取消',
+                style: TextStyle(color: Theme.of(context).colorScheme.outline),
+              ),
+            ),
+            TextButton(
+              onPressed: () async {
+                SmartDialog.dismiss();
+                SmartDialog.showLoading(msg: '正在清除...');
+                try {
+                  // 清除缓存 图片缓存
+                  await clearLibraryCache();
+                  Timer(const Duration(milliseconds: 500), () {
+                    SmartDialog.dismiss().then((res) {
+                      SmartDialog.showToast('清除完成');
+                    });
+                  });
+                } catch (err) {
+                  SmartDialog.dismiss();
+                  SmartDialog.showToast(err.toString());
+                }
+              },
+              child: const Text('确认'),
+            )
+          ],
+        );
+      },
+    ).then((res) {
+      return true;
+    });
+    return cleanStatus;
+  }
+
+  /// 清除 Documents 目录下的 DioCache.db
+  Future clearApplicationCache() async {
+    Directory directory = await getApplicationDocumentsDirectory();
+    if (directory.existsSync()) {
+      String dioCacheFileName =
+          '${directory.path}${Platform.pathSeparator}DioCache.db';
+      var dioCacheFile = File(dioCacheFileName);
+      if (dioCacheFile.existsSync()) {
+        dioCacheFile.delete();
+      }
+    }
+  }
+
+  // 清除 Library/Caches 目录及文件缓存
+  Future clearLibraryCache() async {
+    var appDocDir = await getTemporaryDirectory();
+    if (appDocDir.existsSync()) {
+      await appDocDir.delete(recursive: true);
+    }
+  }
+
+  /// 递归方式删除目录及文件
+  Future deleteDirectory(FileSystemEntity file) async {
+    if (file is Directory) {
+      final List<FileSystemEntity> children = file.listSync();
+      for (final FileSystemEntity child in children) {
+        await deleteDirectory(child);
+      }
+    }
+    await file.delete();
+  }
+}