kod3r/dlib_opencv_android.md

## dlib_opencv_android.md

      
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              dlib_opencv_android.md
            
          
    dlib and OpenCV in Android app


Create project and get OpenCV working


Follow the instructions on the following link.
NOTICE: When creating the new project, on the C++ Support tab, select C++11 from the dropdown.
Link: https://github.com/leadrien/opencv_native_androidstudio#how-to-create-the-native-opencv-project-from-scratch


Download correct version of dlib


The most recent version of dlib seems to have problems on Android, download version 19.1.


Unzip dlib in project folder


Uzip the downloaded dlib zip file to your-project-name/app. You should now have a dlib-19.1 folder there.


Edit CMakeList.txt


Add after the line set_target_properties( lib_opencv .....:
set(DLIB_DIR dlib-19.1)
include_directories(${DLIB_DIR} include)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")

Add inside add_library, after src/main/cpp/native-lib.cpp:
${DLIB_DIR}//dlib/threads/threads_kernel_shared.cpp
${DLIB_DIR}/dlib/entropy_decoder/entropy_decoder_kernel_2.cpp
${DLIB_DIR}/dlib/base64/base64_kernel_1.cpp
${DLIB_DIR}/dlib/threads/threads_kernel_1.cpp
${DLIB_DIR}/dlib/threads/threads_kernel_2.cpp


You should be good to go!


Notice that dlib will be slow if you compile in Debug mode, I suggest compiling in Release mode.