first commit

2024-09-27 01:31:25 +08:00
commit 07c46ac300
558 changed files with 37414 additions and 0 deletions
--- a/untitled/lib/utils/CLearCache.dart
+++ b/untitled/lib/utils/CLearCache.dart
@@ -0,0 +1,94 @@
+import 'dart:io';
+import 'package:path_provider/path_provider.dart';
+
+/*
+ * 计算清除缓存
+ */
+class ClearCache {
+
+  ///加载缓存
+  static Future<String> loadCache() async {
+    try {
+      Directory tempDir = await getTemporaryDirectory();
+      double value = await ClearCache._getTotalSizeOfFilesInDir(tempDir);
+      // tempDir.list(followLinks: false,recursive: true).listen((file){
+      //     //打印每个缓存文件的路径
+      //   print(file.path);
+      // });
+      return ClearCache._renderSize(value);
+    } catch (err) {
+      print(err);
+    }
+  }
+
+  // 清理缓存
+  static Future<bool> clearCache() async {
+    //此处展示加载loading
+    try {
+      Directory tempDir = await getTemporaryDirectory();
+      //删除缓存目录
+      await ClearCache.delDir(tempDir);
+      await ClearCache.loadCache();
+      return true;
+    } catch (e) {
+      print(e);
+      return false;
+    } finally {
+      //此处隐藏加载loading
+    }
+  }
+
+  /// 递归方式 计算文件的大小
+  static Future<double> _getTotalSizeOfFilesInDir(final FileSystemEntity file) async {
+    try {
+      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;
+        if (children != null)
+          for (final FileSystemEntity child in children)
+            total += await ClearCache._getTotalSizeOfFilesInDir(child);
+        return total;
+      }
+      return 0;
+    } catch (e) {
+      print(e);
+      return 0;
+    }
+  }
+
+  ///递归方式删除目录
+  static Future<Null> delDir(FileSystemEntity file) async {
+    try {
+      if (file is Directory) {
+        final List<FileSystemEntity> children = file.listSync();
+        for (final FileSystemEntity child in children) {
+          await delDir(child);
+        }
+      }
+      await file.delete();
+    } catch (e) {
+      print(e);
+    }
+  }
+
+  /// 格式化文件大小
+  static String _renderSize(double value) {
+    if (null == value) {
+      return '0';
+    }
+    List<String> unitArr = List()..add('B')..add('K')..add('M')..add('G');
+    int index = 0;
+    while (value > 1024) {
+      index++;
+      // value = value / 1024;
+      value = value / 8024;
+    }
+    String size = value.toStringAsFixed(2);
+    return size + unitArr[index];
+  }
+
+}