How close can we programmatically get to the hardware of an Android device?

问题

the camera of my mobile (running Eclair-update1) keeps being non-responsive in 90% of the time, so I assumed a hardware defect at first. After whiping the cache and the phone user data sereval times it worked again. At least for a while. Now it stopped working again.

Browsing the net I found quite some users who experience the same problem and had a hard time after whiping their user data off the device.

So my question would be: how close can I get to the hardware with the SDK? I'd like to write an app to influence hardware states (e.g. re-initializing the camera, remounting the SDcard aso.), but I'd prefer doing it - if possible - with the SDK instead of NDK.

Thanks in advance!
S.

回答1:

It's not a question of sdk vs. ndk, but of underlying operating system level permissions preventing ordinary (aftermarket vs. manufacturer/carrier installed) android applications in general from doing raw hardware access.

回答2:

• Download Android SDK to your computer
• Boot device to recovery
• Connect USB cable to PC
• Run adb shell then
• umount /data
• umount /system
• e2fsck -fv /dev/block/stl9
• e2fsck -fv /dev/block/stl10

Taken from forum.xda-developers.com/showthread.php?t=1396366

来源：https://stackoverflow.com/questions/4133874/how-close-can-we-programmatically-get-to-the-hardware-of-an-android-device