import 'dart:io';
|
import 'package:path_provider/path_provider.dart';
|
|
/// 缓存管理类
|
/// ./lib/utils/cache_util.dart
|
class CacheUtil {
|
/// 获取缓存大小
|
static Future<int> total() async {
|
Directory tempDir = await getTemporaryDirectory();
|
if (tempDir == null) return 0;
|
int total = await _reduce(tempDir);
|
return total;
|
}
|
|
/// 清除缓存
|
static Future<void> clear() async {
|
Directory tempDir = await getTemporaryDirectory();
|
if (tempDir == null) return;
|
await _delete(tempDir);
|
}
|
|
/// 递归缓存目录，计算缓存大小
|
static Future<int> _reduce(final FileSystemEntity file) async {
|
/// 如果是一个文件，则直接返回文件大小
|
if (file is File) {
|
int length = await file.length();
|
return length;
|
}
|
|
/// 如果是目录，则遍历目录并累计大小
|
if (file is Directory) {
|
final List<FileSystemEntity> children = file.listSync();
|
|
int total = 0;
|
|
if (children != null && children.isNotEmpty)
|
for (final FileSystemEntity child in children)
|
total += await _reduce(child);
|
|
return total;
|
}
|
|
return 0;
|
}
|
|
/// 递归删除缓存目录和文件
|
static Future<void> _delete(FileSystemEntity file) async {
|
if (file is Directory) {
|
final List<FileSystemEntity> children = file.listSync();
|
for (final FileSystemEntity child in children) {
|
await _delete(child);
|
}
|
} else {
|
await file.delete();
|
}
|
}
|
}
|
