Turned off android camera and java wrappers for low Android API levels…

Turned off android camera and java wrappers for low Android API levels (android-8 is required for these components)

CMakeLists.txt

@@ -664,7 +664,7 @@ endif()
 
 # Java support
 # ===================================================
-if (PYTHON_EXECUTABLE AND ANDROID)
+if (PYTHON_EXECUTABLE AND ANDROID AND ANDROID_API_LEVEL GREATER 7)
     option(BUILD_JAVA_SUPPORT "Build with Java support" TRUE)
 endif()
 
@@ -953,7 +953,9 @@ if(WIN32)
 endif()
 
 ############## Android source tree for native camera ###############
-if(ANDROID)
+if(ANDROID AND ANDROID_API_LEVEL GREATER 7)
+    option(WITH_ANDROID_CAMERA "Build with native Android camera support" TRUE)
+
     SET (ANDROID_SOURCE_TREE "ANDROID_SOURCE_TREE-NOTFOUND" CACHE PATH 
 "Path to Android source tree.
 Set this variable to path to your Android sources to compile
@@ -1276,7 +1278,7 @@ if(ANDROID)
     endif()
     if(BUILD_ANDROID_CAMERA_WRAPPER)
         set(CMAKE_CAMERA_LIBS_CONFIGCMAKE "native_camera_r${ANDROID_VERSION}")
-    else()
+    elseif(WITH_ANDROID_CAMERA)
         SET(CMAKE_CAMERA_LIBS_CONFIGCMAKE "")
         file(GLOB CMAKE_CAMERA_LIBS "${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/lib/libnative_camera_r*.so")
         foreach(cam_lib ${CMAKE_CAMERA_LIBS})
@@ -1575,10 +1577,14 @@ if(UNIX AND NOT APPLE)
     status("    Xine:"           HAVE_XINE           THEN YES ELSE NO)
 
     if(ANDROID)
-        if(BUILD_ANDROID_CAMERA_WRAPPER)
-            status("    AndroidNativeCamera:" "build for Android ${ANDROID_VERSION}")
+        if(WITH_ANDROID_CAMERA)
+            if(BUILD_ANDROID_CAMERA_WRAPPER)
+                status("    AndroidNativeCamera:" "build for Android ${ANDROID_VERSION}")
+            else()
+                status("    AndroidNativeCamera:" ARMEABI_V7A THEN use prebuilt libraries ELSE NO)
+            endif()
         else()
-            status("    AndroidNativeCamera:" ARMEABI_V7A THEN use prebuilt libraries ELSE NO)
+            status("    AndroidNativeCamera:" "NO (native camera requires Android API level 8 or higher)")
         endif()
     endif()
 elseif(APPLE)
@@ -1613,7 +1619,11 @@ status("  Interfaces:")
 status("    Python:"              BUILD_NEW_PYTHON_SUPPORT THEN YES ELSE NO)
 status("    Python interpreter:"  PYTHON_EXECUTABLE        THEN "${PYTHON_EXECUTABLE} (ver ${PYTHON_VERSION_MAJOR_MINOR})" ELSE NO)
 status("    Python numpy:"        PYTHON_USE_NUMPY         THEN YES ELSE "NO (Python interface will not cover OpenCV 2.x API)")
-status("    Java:"                BUILD_JAVA_SUPPORT       THEN YES ELSE NO)
+if(ANDROID AND ANDROID_API_LEVEL LESS 8)
+    status("    Java:" "NO (Java API requires Android API level 8 or higher)")
+else()
+    status("    Java:" BUILD_JAVA_SUPPORT THEN YES ELSE NO)
+endif()
 
 if(ANDROID)
     status("    android tool:"    ANDROID_EXECUTABLE       THEN "${ANDROID_EXECUTABLE}" ELSE NO)

OpenCV.mk.in

@@ -11,14 +11,14 @@ OPENCV_LOCAL_C_INCLUDES:=@CMAKE_INCLUDE_DIRS_CONFIGCMAKE@
 
 OPENCV_MODULES := contrib calib3d objdetect features2d imgproc video  highgui ml legacy flann core
 
-ifeq ($(TARGET_ARCH_ABI),armeabi)
-OPENCV_CAMERA_MODULES:=
-else
 ifeq (${OPENCV_CAMERA_MODULES},off)
-OPENCV_CAMERA_MODULES:=
+	OPENCV_CAMERA_MODULES:=
 else
-OPENCV_CAMERA_MODULES:=@CMAKE_CAMERA_LIBS_CONFIGCMAKE@
-endif
+	ifeq ($(TARGET_ARCH_ABI),armeabi)
+		OPENCV_CAMERA_MODULES:=
+	else
+		OPENCV_CAMERA_MODULES:=@CMAKE_CAMERA_LIBS_CONFIGCMAKE@
+	endif
 endif
 
 OPENCV_LIB_TYPE:=@OPENCV_LIBTYPE_CONFIGMAKE@
@@ -28,7 +28,9 @@ ifeq ($(OPENCV_LIB_TYPE),SHARED)
 	OPENCV_EXTRA_COMPONENTS:=
 else
 	OPENCV_LIB_SUFFIX:=a
-	OPENCV_MODULES+= androidcamera
+	ifeq (@WITH_ANDROID_CAMERA@,ON)
+		OPENCV_MODULES+= androidcamera
+	endif
 	OPENCV_EXTRA_COMPONENTS:=@JPEG_LIBRARIES@ @PNG_LIBRARIES@ @TIFF_LIBRARIES@ @JASPER_LIBRARIES@ @ZLIB_LIBRARY@
 endif
 

OpenCVConfig.cmake.in

@@ -27,6 +27,7 @@
 #      - OpenCV_LIB_COMPONENTS
 #      - OpenCV_EXTRA_COMPONENTS
 #      - OpenCV_USE_MANGLED_PATHS
+#      - OpenCV_HAVE_ANDROID_CAMERA
 #
 # =================================================================================================
 
@@ -45,9 +46,12 @@ set(OpenCV_USE_MANGLED_PATHS @OPENCV_MANGLED_INSTALL_PATHS@)
 # Extract the directory where *this* file has been installed (determined at cmake run-time)
 get_filename_component(OpenCV_CONFIG_PATH "${CMAKE_CURRENT_LIST_FILE}" PATH)
 
-#Get the absolute path with no ../.. relative marks, to eliminate implicit linker warnings
+# Get the absolute path with no ../.. relative marks, to eliminate implicit linker warnings
 get_filename_component(OpenCV_INSTALL_PATH "${OpenCV_CONFIG_PATH}/../.." REALPATH)
 
+# Presence of Android native camera support
+set (OpenCV_HAVE_ANDROID_CAMERA @WITH_ANDROID_CAMERA@)
+
 # ======================================================
 # Include directories to add to the user project:
 # ======================================================
@@ -71,7 +75,7 @@ SET(OpenCV_LIB_COMPONENTS opencv_contrib opencv_legacy opencv_objdetect opencv_c
 #libraries order is very important because linker from Android NDK is one-pass linker
 if(NOT ANDROID)
     LIST(INSERT OpenCV_LIB_COMPONENTS 0 opencv_gpu)
-ELSEIF(NOT OpenCV_SHARED)
+ELSEIF(NOT OpenCV_SHARED AND OpenCV_HAVE_ANDROID_CAMERA)
     LIST(APPEND OpenCV_LIB_COMPONENTS opencv_androidcamera)
 endif()
 
@@ -138,20 +142,18 @@ ENDIF()
 # ======================================================
 #  Android camera helper macro
 # ======================================================
-IF (ANDROID)
+IF (OpenCV_HAVE_ANDROID_CAMERA)
   macro( COPY_NATIVE_CAMERA_LIBS target )
-    IF( ARMEABI_V7A)
-      get_target_property(target_location ${target} LOCATION)
-      get_filename_component(target_location "${target_location}" PATH)
-      file(GLOB camera_wrappers "${OpenCV_LIB_DIR}/libnative_camera_r*.so")
-      foreach(wrapper ${camera_wrappers})
-          ADD_CUSTOM_COMMAND(
-            TARGET ${target}
-            POST_BUILD
-            COMMAND ${CMAKE_COMMAND} -E copy "${wrapper}" "${target_location}"
-            )
-      endforeach()
-    ENDIF( ARMEABI_V7A )
+    get_target_property(target_location ${target} LOCATION)
+    get_filename_component(target_location "${target_location}" PATH)
+    file(GLOB camera_wrappers "${OpenCV_LIB_DIR}/libnative_camera_r*.so")
+    foreach(wrapper ${camera_wrappers})
+      ADD_CUSTOM_COMMAND(
+        TARGET ${target}
+        POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy "${wrapper}" "${target_location}"
+      )
+    endforeach()
   endmacro()
 ENDIF(ANDROID)
 

modules/CMakeLists.txt

@@ -3,8 +3,10 @@ if(ANDROID)
   if(ANDROID_API_LEVEL LESS 8)
     ADD_DEFINITIONS(-DGTEST_HAS_CLONE=0)
   endif()
-
-  add_subdirectory(androidcamera)
+  
+  IF(WITH_ANDROID_CAMERA)
+      add_subdirectory(androidcamera)
+  endif()
 endif()
 
 add_subdirectory(calib3d)

modules/highgui/CMakeLists.txt

@@ -211,7 +211,7 @@ if(APPLE)
     endif()
 endif(APPLE)
 
-if(ANDROID)
+if(WITH_ANDROID_CAMERA)
   include_directories("${CMAKE_CURRENT_SOURCE_DIR}/../androidcamera/include")
   set(highgui_srcs ${highgui_srcs} src/cap_android.cpp)
   add_definitions(-DHAVE_ANDROID_NATIVE_CAMERA)
@@ -333,7 +333,7 @@ if(NOT ZLIB_FOUND)
     add_dependencies(${the_target} zlib)
 endif()
 
-if(ANDROID)
+if(WITH_ANDROID_CAMERA)
     add_dependencies(${the_target} opencv_androidcamera)
 endif()
 
@@ -377,7 +377,7 @@ if(BUILD_TESTS)
                       "${CMAKE_CURRENT_BINARY_DIR}")
 
   set(test_deps opencv_ts opencv_highgui opencv_imgproc)
-  if(ANDROID)
+  if(WITH_ANDROID_CAMERA)
     set(test_deps ${test_deps} opencv_androidcamera)
   endif()
 

modules/java/CMakeLists.txt

@@ -5,7 +5,7 @@ project(opencv_java)
 
 SET(OPENCV_JAVA_MODULES objdetect features2d imgproc video highgui ml core)
 SET(OPENCV_EXTRA_JAVA_MODULES calib3d contrib legacy flann)
-IF(ANDROID AND NOT BUILD_SHARED_LIBS)
+IF(WITH_ANDROID_CAMERA AND NOT BUILD_SHARED_LIBS)
     LIST(APPEND OPENCV_EXTRA_JAVA_MODULES androidcamera)
 ENDIF()