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[Ubuntu]android studio配置javah和ndk-build

首先下载OpenCV Android sdk库。编辑Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

ifdef OPENCV_ANDROID_SDK
ifneq ("","$(wildcard $(OPENCV_ANDROID_SDK)/OpenCV.mk)")
    include ${OPENCV_ANDROID_SDK}/OpenCV.mk
else
    include ${OPENCV_ANDROID_SDK}/sdk/native/jni/OpenCV.mk
endif
else
include /home/zj/Android/OpenCV-android-sdk/sdk/native/jni/OpenCV.mk
endif

LOCAL_SRC_FILES  := main.cpp ocrutil.cpp ocr.cpp
LOCAL_C_INCLUDES += $(LOCAL_PATH)
LOCAL_LDLIBS     += -llog -ldl

LOCAL_MODULE     := IDNumberOCR

include $(BUILD_SHARED_LIBRARY)

编辑Application.mk

APP_STL := c++_static
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := arm64-v8a armeabi-v7a
APP_PLATFORM := android-8