ndk-build NDK_APPLICATION_MK=./Application.mk  NDK_DEBUG=1

APP_BUILD_SCRIPT=$(APP_PROJECT_PATH)/cpp/Android.mk(相对于项目的位置)

Application.mk

APP_CPPFLAGS:=-frtti -fexceptionsAPP_ABI:=armeabi armeabi-v7a x86#APP_ABI:=x86APP_OPTIM := debug# In NDK r8e, we have to use GCC 4.7 for C++11 features like thread, mutex, etc.#  The default GCC is 4.6, which does NOT define macro _GLIBCXX_HAS_GTHREADS,#  so you’ll get errors like "mutex in namespace std does not name a type" etc.#NDK_TOOLCHAIN_VERSION := 4.7# GNU STL implements most C++11 features. Use either gnustl_static or gnustl_shared#  Without this your C++ code will not be able to access headers like 
    
     , 
     
      APP_STL := gnustl_staticAPP_BUILD_SCRIPT=$(APP_PROJECT_PATH)/cpp/Android.mk
     
    

Android.mk

LOCAL_SRC_FILES := ../cpp/native-lib.cpp  （相对于jni目录的位置）

LOCAL_PATH := $(call my-dir)  include $(CLEAR_VARS)  OPENCV_LIB_TYPE:=STATICifeq ("$(wildcard $(OPENCV_MK_PATH))","")  #try to load OpenCV.mk from default install locationinclude C:\work-software\OpenCV-android-sdk\sdk\native\jni\OpenCV.mk#include /opt/OpenCV-android-sdk/sdk/native/jni/OpenCV.mkelseinclude $(OPENCV_MK_PATH)endif  LOCAL_MODULE    := native-lib#MY_CPP_LIST := $(wildcard $(LOCAL_PATH)/*.cpp)#LOCAL_SRC_FILES := $(MY_CPP_LIST:$(LOCAL_PATH)/%=%)LOCAL_SRC_FILES := ../cpp/native-lib.cppFILE_LIST := $(wildcard /opt/OpenCV-android-sdk/sdk/native/lib/arm64-v8a/*)LOCAL_LDLIBS := -llogLOCAL_LDLIBS += -ljnigraphicsLOCAL_LDLIBS += -lz # Compression library# C++11 and threading enabling features.#  Otherwise c++11, pthread, rtti and exceptions are not enabled by defaultLOCAL_CPPFLAGS := -std=c++11 -pthread -frtti -fexceptionsinclude $(BUILD_SHARED_LIBRARY)

android {    compileSdkVersion 21    buildToolsVersion "21.1.2"    defaultConfig {        applicationId "com.xxx.yyy"        versionCode 1        versionName '1.0'	    minSdkVersion 10	    targetSdkVersion 21    }    buildTypes {        release {            minifyEnabled false            proguardFiles ('proguard-android.txt')        }    }    tasks.withType(JavaCompile) {        compileTask -> compileTask.dependsOn 'ndkBuild', 'copyJniLibs'    }    sourceSets {        main {	        jni.srcDirs = []            jniLibs.srcDirs = ['src/main/jniLibs']        }    }}task ndkBuild(type: Exec) {	def ndkDir = project.plugins.findPlugin('com.android.application').sdkHandler.getNdkFolder()    commandLine "$ndkDir/ndk-build.cmd", '-C', 'src/main/jni',		    "NDK_OUT=$buildDir/ndk/obj",		    "NDK_APP_DST_DIR=$buildDir/ndk/libs/\$(TARGET_ARCH_ABI)"}task copyJniLibs(type: Copy) {    from fileTree(dir: file(buildDir.absolutePath + '/ndk/libs'), include: '**/*.so')    into file('src/main/jniLibs')}