After recompiling the special kernel for android,
The android 2.2 now works on my wm8505 7 inch cheap easy pc !
But , WM8505 crashed when typing "insmod via-velocity.ko". Just the same as it on debian.
The wireless adapter driver that worked perfectly on debain but didn't work on android.
I think it isn't an easy job for me to do the troubleshooting...