手机管理系统空间

// 获取所有已安装应用的列表
PackageManager pm = getPackageManager();
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);

for (ApplicationInfo packageInfo : packages) {
    try {
        // 获取每个应用的缓存大小
        Context context = createPackageContext(packageInfo.packageName, Context.CONTEXT_IGNORE_SECURITY);
        long cacheSize = getCacheSize(context);
        Log.d("AppCache", "Package: " + packageInfo.packageName + ", Cache Size: " + cacheSize + " bytes");
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
}

// 计算缓存大小的辅助方法
private long getCacheSize(Context context) {
    File cacheDir = context.getCacheDir();
    return getFolderSize(cacheDir);
}

// 计算文件夹大小的辅助方法
private long getFolderSize(File folder) {
    long size = 0;
    File[] files = folder.listFiles();
    if (files != null) {
        for (File file : files) {
            if (file.isDirectory()) {
                size += getFolderSize(file);
            } else {
                size += file.length();
            }
        }
    }
    return size;
}