（重新）在 Android 模拟器上安装 SD 卡
在模拟器上，我可以从“设置”中卸载 SD 卡。
然后我可以将其安装到我的操作系统上，然后正常卸载它。
我无法弄清楚如何在模拟器上重新安装它（无需重新启动它）。
提示：
adb命令remount无关：它与/system无关；emulator命令无关：它仅与启动模拟器- 在两个地方安装 SD 卡，当然会搞乱一切（我尝试过）
更多：
mount输出以下内容：/dev/block//vold/179:0 /sdcard vfat rw,dirsync,nosuid,nodev,noexec,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020, codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0在卸载 shell 后，使用与上面相同的选项再次尝试从 shell 挂载，会出现段错误
- 不知道为什么
block//vold中的双斜杠，我猜这只是一个拼写错误
On the emulator, I can unmount the SD card from the Settings.
I can then mount it on my OS, then unmount it normally.
I haven't been able to figure out how to re-mount it then on the emulator (without rebooting it).
hints:
- the
adbcommandremountis unrelated: it's about/system - the
emulatorcommand is unrelated: it's only about starting the emulator - mounting the SD card in two places of course messing everything up (I tried)
more:
mountoutputs the following:/dev/block//vold/179:0 /sdcard vfat rw,dirsync,nosuid,nodev,noexec,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0trying to mount again from the shell after unmounting it, using the same options as above, gives a segfault
- no idea why the double slash in
block//vold, I guess it's just a typo
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开发人员指南表明这是不可能的：
虽然 Android 将卸载 SD 卡，但模拟器进程会保持备份文件打开。
更熟悉 QEMU 的人可能能够提供进一步的见解，但如果我是你，我会尝试使用 NFS 来解决这个问题。
The developers guide suggests that this isn't possible:
While Android will unmount the SD card, the emulator process keeps the backing file open.
Someone more familiar with QEMU may be able to provide further insight but, if I were you, I would just try to use NFS to solve this problem.
我尝试进入“设置”并卸载 SD 卡，效果很好。尝试一下；重新安装它非常简单。
不过，这似乎不能通过 adb/cli 来完成。
I tried going to Settings and unmounting the SD card and this worked fine. Give it a try; remounting it is quite simple.
Doesn't seem like this can be done via adb/cli though.