Android 2.1的编程方式卸载SD卡 [英] Android 2.1 programatically unmount SDCard
问题描述
我有写入重要数据到SD卡和使用AES，以后将被用于桌面应用程序进行加密的应用程序。我注意到，如果我不卸载从设置菜单有时文件没有写在所有的SD卡，或已损坏。
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.
反正在Android 2.1系统，我可以卸载SD卡编程？因为我是pretty的肯定，不时的用户会忘记这样做，我会成为一个固定的问题，我真的不希望这样。
Is there anyway in Android 2.1 that I can unmount the SDCard programatically? 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.
如果这是不可能的，什么Linux命令我应该用卸载SD卡？由于应用程序将运行在某些平板电脑有一个根深蒂固的操作系统。
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.
感谢。
推荐答案
您应该卸载什么用正确的顺序的SD卡，例如：
You should unmount what's using the sdcard in the proper order, for example
umount /mnt/sdcard/.android_secure
umount /mnt/sdcard
或，可能同步缓冲器与文件系统就足够
or, probably synchronizing the buffers with the filesystem would be enough
sync; sync
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