Android 2.1 以编程方式卸载 SDCard
我有一个应用程序，它将重要数据写入 SDCard 并使用 AES 对其进行加密，稍后将由桌面应用程序使用。我注意到，如果我不从“设置”菜单中卸载 SDCard，有时文件根本不会写入，或者已损坏。
在 Android 2.1 中是否可以通过编程方式卸载 SDCard？因为我很确定用户有时会忘记这样做，而我将是解决问题的人，我真的不希望这样。
如果这不可能，我应该使用什么 Linux 命令来卸载 SDCard？由于该应用程序将在某些具有 root 操作系统的平板电脑上运行。
I have an application that writes important data to the SDCard and encrypts it using AES, which later will be used by a desktop application. I have noticed that if I do not unmount the SDCard from the Settings menu sometimes the files don't get written at all, or are corrupted.
Is there anyway in Android 2.1 that I can unmount the SDCard programmatically? Because I'm pretty sure that from time to time the users will forget to do this, and I'll be the one fixing the problems and I really don't want this.
If this is not possible,what Linux command should I use to unmount the SDCard? Since the application will run on some tablets that have a rooted OS.
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例如，您应该以正确的顺序卸载正在使用 SD 卡的内容，
或者，可能将缓冲区与文件系统同步就足够了
You should unmount what's using the sdcard in the proper order, for example
or, probably synchronizing the buffers with the filesystem would be enough