更新到 Froyo 后无法使用 adb cd do sdcard
我的应用程序拍摄照片并保存到 SD 卡。它在 Android 2.1 上运行良好，但我刚刚升级到 Froyo，现在我得到：
ERROR/CameraPreview(28216): Problem taking picture
WARN/System.err(28216): java.io.FileNotFoundException: /mnt/sdcard/silviaterra/temp.jpg (Permission denied)
WARN/System.err(28216): at org.apache.harmony.luni.platform.OSFileSystem.openImpl(Native Method)
WARN/System.err(28216): at org.apache.harmony.luni.platform.OSFileSystem.open(OSFileSystem.java:152)
WARN/System.err(28216): at java.io.FileOutputStream.<init>(FileOutputStream.java:97)
WARN/System.err(28216): at java.io.FileOutputStream.<init>(FileOutputStream.java:69)
当我打开 adb shell（作为 root 用户）时，我得到：
$ cd sdcard
cd: can't cd to sdcard
$ cd mnt/sdcard
cd: can't cd to mnt/sdcard
我尝试终止并重新启动 adb 服务器，但没有运气。对发生的事情有什么想法吗？谢谢！
My application takes a picture and saves to the sdcard. It worked fine on Android 2.1, but I just upgraded to Froyo and now I'm getting:
ERROR/CameraPreview(28216): Problem taking picture
WARN/System.err(28216): java.io.FileNotFoundException: /mnt/sdcard/silviaterra/temp.jpg (Permission denied)
WARN/System.err(28216): at org.apache.harmony.luni.platform.OSFileSystem.openImpl(Native Method)
WARN/System.err(28216): at org.apache.harmony.luni.platform.OSFileSystem.open(OSFileSystem.java:152)
WARN/System.err(28216): at java.io.FileOutputStream.<init>(FileOutputStream.java:97)
WARN/System.err(28216): at java.io.FileOutputStream.<init>(FileOutputStream.java:69)
When I open up adb shell (as root user), I get:
$ cd sdcard
cd: can't cd to sdcard
$ cd mnt/sdcard
cd: can't cd to mnt/sdcard
I've tried killing and restarting the adb server, but no luck. Any ideas on what's going on? Thanks!
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好吧——这个有点棘手。结果我的“USB 连接类型”是“磁盘驱动器”，所以即使我已经从 Ubuntu 中卸载了 SD 卡，我猜仍然有一个锁。诀窍是切换回“仅充电”
Ok - this one was a bit tricky. Turns out that my "USB Connection Type" was "Disk drive", and so even though I had unmounted the sdcard from Ubuntu, I guess there was still a lock in place. The trick is to just switch back to "Charge Only"