export ANDROID_NDK_HOME=/DATA/Android/Ndk/android-ndk-r13b
export PATH=$PATH:$ANDROID_NDK_HOME


Error:Could not find com.android.support:appcompat-v7:25.3.1.
required by:
    project :app
    project :app > project :dlib

Please install the Android Support Repository from the Android SDK Manager.
<a href="openAndroidSdkManager">Open Android SDK Manager</a>



Error:A problem occurred configuring project ‘:app‘.
> Could not resolve all dependencies for configuration ‘:app:_debugApk‘.
   > A problem occurred configuring project ‘:dlib‘.
      > Could not resolve all dependencies for configuration ‘:dlib:_debugPublishCopy‘.
         > Could not find com.android.support:appcompat-v7:25.3.1.
           required by:
               project :dlib
         > Could not find com.android.support:support-Annotations:25.3.1.
           required by:
               project :dlib


第一次编译步骤
./envsetup
python build.py
cp -r libs/* ../dlib-android-app/dlib/src/main/jniLibs

后面的编译
python build.py
或者ndk-build -j 2
cp -r libs/* ../dlib-android-app/dlib/src/main/jniLibs


libandroid_dlib.so

cmake_minimum_required(VERSION 3.4.1)

message("checking CMAKE_SYstem_NAME = ‘${CR_732_11845@AKE_SYstem_NAME}‘")
if (${CR_732_11845@AKE_SYstem_NAME} MATCHES "Darwin")
  add_deFinitions(-DOS_OSX)
elseif (${CR_732_11845@AKE_SYstem_NAME} MATCHES "Linux")
  add_deFinitions(-DOS_LINUX)
elseif (${CR_732_11845@AKE_SYstem_NAME} MATCHES "Windows")
  add_deFinitions(-DOS_WIN)
elseif (${CR_732_11845@AKE_SYstem_NAME} MATCHES "Android")
  add_deFinitions(-DOS_ANDROID)
  message("checking CMAKE_ABI_NAME = ‘${CR_732_11845@AKE_ANDROID_ARCH_ABI}‘")
else()
  message("OS not detected.")
endif()

set(CMAKE_CXX_FLAGS "${CR_732_11845@AKE_CXX_FLAGS} -std=c++11 -Wall -Werror")

## Define each subfolders
set(JNI_DETECTION_INCLUDE jni/jni_detections)
set(JNI_DETECTION_SRC jni/jni_detections)
set(JNI_COMMON_INCLUDE jni)
set(JNI_COMMON_SRC jni/jni_common)
set(DLIB_DIR dlib)
set(EXT_DIR third_party)
set(GLOG_INCLUDE_DIR ${EXT_DIR}/@H_824_26@miniglog)
set(OPENCV_PREBUILT ${EXT_DIR}/OpenCV-android-sdk/sdk/native/jni)

# Opencv and it will use static import
set(ANDROID_NDK_ABI_NAME ${CR_732_11845@AKE_ANDROID_ARCH_ABI})
include(${OPENCV_PREBUILT}/OpenCVConfig.cmakE)

# Include headers
include_directories(${DLIB_DIR} ${OpenCV_INCLUDE_DIRS} ${GLOG_INCLUDE_DIR} ${JNI_COMMON_INCLUDE} ${JNI_DETECTION_INCLUDE} includE)

add_library(android_dlib SHARED
            ${JNI_DETECTION_SRC}/jni_face_det.cpp
            ${JNI_DETECTION_SRC}/jni_iR_732_11845@ageutils.cpp
            ${JNI_DETECTION_SRC}/jni_pedeStrian_det.cpp
            ${JNI_COMMON_SRC}/jni_bitmap2mat.cpp
            ${JNI_COMMON_SRC}/jni_fileutils.cpp
            ${JNI_COMMON_SRC}/jni_utils.cpp
            ${JNI_COMMON_SRC}/rgb2yuv.cpp
            ${JNI_COMMON_SRC}/yuv2rgb.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
            ${EXT_DIR}/miniglog/glog/logging.cC)

target_link_libraries(android_dlib
                      android
                      jnigraphics
                      z
                      m
                      dl
                      log)