After suffer for my previous problem (
https://groups.google.com/forum/?fromgroups#!topic/android-opencv/LIixgr-iYSs) for entire day, I switch to use OpenCV 2.3.1 but I got another problem. If I don't add the OpenCV library it can load my native library and works well, but if I add OpenCV library and just create a Mat object, it can't load my native lib (it throws UnsatisfiedLinkError: couldn't load nativeLib: find library returned null). I use HTC EVO 3D, build by ndk-r8. Thank you.