Question

有一种方法可以返回某个目录的可用空间：

fun bytesAvailable(f: File): Long {
    val stat = StatFs(f.path)
    val bytesAvailable = stat.blockSize.toLong() * stat.availableBlocks.toLong()
    return bytesAvailable
}

我有如何使用它：

val downloadsDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
bytesAvailable(backupFile)

我无法直接在手机上捕获此错误，但我看到了用户发布的此类崩溃报告：

Caused by java.lang.IllegalArgumentException: Invalid path: /storage/sdcard0/Download
android.os.StatFs.doStat (StatFs.java:46)
android.os.StatFs.<init> (StatFs.java:39)
com.nickapps.Diary.presentation.ui.fragments.settings.SettingsPresenter.bytesAvailable (SettingsPresenter.kt:187)
com.nickapps.Diary.presentation.ui.fragments.settings.SettingsPresenter$doSimpleExport$2.call (SettingsPresenter.kt:74)
com.nickapps.Diary.presentation.ui.fragments.settings.SettingsPresenter$doSimpleExport$2.call (SettingsPresenter.kt:26)
rx.internal.operators.CompletableFlatMapSingleToCompletable$SourceSubscriber.onSuccess (CompletableFlatMapSingleToCompletable.java:61)
rx.Single$18.onNext (Single.java:1896)
...


Caused by android.system.ErrnoException: statvfs failed: ENOENT (No such file or directory)
libcore.io.Posix.statvfs (Posix.java)
libcore.io.BlockGuardOs.statvfs (BlockGuardOs.java:298)
android.system.Os.statvfs (Os.java:459)
android.os.StatFs.doStat (StatFs.java:44)
android.os.StatFs.<init> (StatFs.java:39)
com.nickapps.Diary.presentation.ui.fragments.settings.SettingsPresenter.bytesAvailable (SettingsPresenter.kt:187)
com.nickapps.Diary.presentation.ui.fragments.settings.SettingsPresenter$doSimpleExport$2.call (SettingsPresenter.kt:74)
com.nickapps.Diary.presentation.ui.fragments.settings.SettingsPresenter$doSimpleExport$2.call (SettingsPresenter.kt:26)

此类例外仅在21个以上的设备上发生。授予运行时权限WRITE_EXTERNAL_STORAGE。

这是一个错误吗？某些设备上可能不存在Download文件夹吗？

StatFs抛出无效路径：/ storage / sdcard0 / Download

0 个答案: