background subtraction and accumulation in android opencv

[Andy]

Anyone done simple background subtraction in android's opencv?
I tried just hacking the Image manipulations example sample project,
and replaced one of the process frame commands with:

Imgproc.accumulate(mRgbaInnerWindow, mRgbaSubtract);

but i get null pointers
but also, once i get a background image, what's the equivalent of the
cv::AbsDiff? function?
thanks!

[Kirill Kornyakov]

Here are some Unit-tests for the accumulate function.

Equivalent is the Core.absdiff(src1, src2, dst) function.

Regards,

Kirill