adding cmake based android scripts and a reusable android library - samples to follow - haven't tested yet completely

android/android-cmake/CMakeLists.txt

@@ -0,0 +1,90 @@
+# ----------------------------------------------------------------------------
+#  Root CMake file for Android Opencv Build
+#
+#    To build with cmake
+#        $ mkdir build
+#        $ cd build
+#        $ cmake ..
+#        $ make
+#    Make sure to set the path in the cache for the crystax ndk available 
+#    here:
+#          http://www.crystax.net/android/ndk-r4.php
+#
+#   - initial version August 2010 Ethan Rublee ethan.ruble@gmail.com
+#
+# ----------------------------------------------------------------------------
+
+project(android-opencv-shared)
+
+cmake_minimum_required(VERSION 2.8)
+
+set(opencv_root "$ENV{HOME}/opencv" CACHE PATH "opencv source root directory")
+if(NOT EXISTS ${opencv_root})
+message(FATAL_ERROR "Cannot find your opencv root directory!" )
+endif()
+
+set(android_opencv_mk "${opencv_root}/android/build/android-opencv.mk" cache FILE "the generated android-opencv.mk file")
+if(NOT EXISTS ${android_opencv_mk})
+message(FATAL_ERROR "please locate the cmake generated android-opencv.mk file, usually in the android/build directory...")
+endif()
+
+set(ANDROID true)
+
+file(GLOB module_includes "${opencv_root}/modules/[a-zA-Z]*")
+
+list(REMOVE_ITEM module_includes ${opencv_root}/modules/CMakeLists.txt)
+
+set(module_includes ${module_includes} ${CMAKE_SOURCE_DIR}/../3rdparty $(OPENCV_BUILD_ROOT) )
+foreach(mdir ${module_includes})
+    string(REPLACE "${opencv_root}" "$(OPENCV_ROOT)" n_f ${mdir})	
+    set(android_module_include_dirs "${android_module_include_dirs} ${n_f}/include")
+endforeach()
+
+configure_file("${CMAKE_SOURCE_DIR}/Android.mk.master.in" "${CMAKE_BINARY_DIR}/Android.mk")
+configure_file("${CMAKE_SOURCE_DIR}/Application.mk.in" "${CMAKE_BINARY_DIR}/Application.mk")
+configure_file("${CMAKE_SOURCE_DIR}/AndroidManifest.xml.in" "${CMAKE_BINARY_DIR}/AndroidManifest.xml")
+configure_file("${CMAKE_SOURCE_DIR}/default.properties.in" "${CMAKE_BINARY_DIR}/default.properties")
+
+set(NDK_ROOT  "$ENV{HOME}/android-ndk-r4-crystax" CACHE STRING "the crystax ndk directory")
+if(NOT EXISTS ${NDK_ROOT})
+message(FATAL_ERROR "Cannot find your ndk root directory! please download and 
+unzip the android ndk from crystax to the directory specified by NDK_ROOT
+You may download the crystax ndk from: 
+        http://www.crystax.net/android/ndk-r4.php" )
+endif()
+
+set(J  "2" CACHE STRING "how many processes for make -j <J>")
+
+ADD_CUSTOM_COMMAND(
+OUTPUT    android-ndk
+DEPENDS   ${CMAKE_BINARY_DIR}/Android.mk
+COMMAND   "${NDK_ROOT}/ndk-build" 
+ARGS      --directory=${CMAKE_BINARY_DIR} NDK_APPLICATION_MK=Application.mk -j${J}
+)
+
+ADD_CUSTOM_COMMAND(
+OUTPUT    android-swig
+DEPENDS   ${SWIG_MAIN}
+COMMAND   "swig" 
+ARGS      --directory=${CMAKE_BINARY_DIR} NDK_APPLICATION_MK=Application.mk -j${J}
+)
+
+
+configure_file("${CMAKE_SOURCE_DIR}/android-opencv.mk.in" "${CMAKE_BINARY_DIR}/android-opencv.mk")
+
+ADD_CUSTOM_TARGET(ndk ALL echo
+  DEPENDS android-ndk
+)
+
+message(STATUS "Make will use make -j${J} - for speeding up build - you may change this in the cache")
+message(STATUS "The NDK directory is ${NDK_ROOT}")
+message(STATUS "OpenCV source root is ${opencv_root}")
+message(STATUS "just run make - and grab some coffee or tea ;)")
+message(STATUS "The android opencv libs will be located in ${CMAKE_BINARY_DIR}/obj/local/armeabi*/")
+
+
+
+  
+
+
+