安卓JNI使用OpenCV

  OpenCV也有Java数据结构的包,不过计算速度还是很慢,非不得已不使用此种方式调用OpenCV。使用NDK编写底层OpenCv的调用代码,使用JNI对代码进行封装,可以稍微提高一点效率。

        参考链接:http://www.tuicool.com/articles/yaeeuu

        安卓使用OpenCV注意事项:

        注意事项: 包含OpenCV的工程最好放置在 OpenCV-2.4.10-android-sdk\samples 目录下,省却很多 莫名其妙配置的麻烦。

一、 添加头文件包含:

       对自己建立的SO包里面的JNI源文件,添加即将使用到的头文件包含:

#include 

#include 
#include 
#include 

#include "rec3D.h"

#ifndef _Included_org_opencv_samples_fd_DetectionBasedTracker
#define _Included_org_opencv_samples_fd_DetectionBasedTracker
#ifdef __cplusplus
extern "C" {
#endif

//JNIEnv* jniEnv;
extern "C" jstring Java_com_example_feeljulygpsmap_FeelJulyActivity_careJuly(JNIEnv *env, jobject thiz) ;
extern "C" jint Java_com_example_feeljulygpsmap_FeelJulyActivity_careJulyIn(JNIEnv *env, jobject thiz,jint showCode) ;
extern "C" jintArray Java_com_example_feeljulygpsmap_FeelJulyActivity_careJulyArray(JNIEnv *env, jobject thiz,jintArray InCode) ;


#ifdef __cplusplus
}
#endif
#endif


        使用到OpenCV的源文件:

#pragma once

#ifndef _REC3D_H
#define _REC3D_H

#include 
#include 
#include 

#include 
#include 

#include 

using namespace  cv;
using namespace std;

class MyCamera{

public:
cv::Mat intrinsic_Mat;
cv::Mat disCoeff;


 

二、在工程中添加OpenCV的目录包含和库引用

文件:Android.mk

LOCAL_PATH := $(call my-dir)


include $(CLEAR_VARS)
LOCAL_C_INCLUDES := C:\QT\OpenCV-3.0-android-sdk\sdk\native\jni\include

OPENCV_LIB_TYPE   := static

ifeq ("$(wildcard $(OPENCV_MK_PATH))","")  
#try to load OpenCV.mk from default install location  
include C:\QT\OpenCV-3.0-android-sdk\sdk\native\jni\OpenCV.mk 
else  
include $(OPENCV_MK_PATH)  
endif  

#include $(CLEAR_VARS)

LOCAL_MODULE    := feelJulyGpsMap
LOCAL_SRC_FILES := feelJulyGpsMap.cpp \
                   rec3D.cpp

#LOCAL_LDLIBS    := -landroid

LOCAL_LDLIBS += -L$(SYSROOT)/usr/lib -llog
include $(BUILD_SHARED_LIBRARY)


在此注意事项:

LOCAL_C_INCLUDES := C:\QT\OpenCV-3.0-android-sdk\sdk\native\jni\include

为OpenCV的C++ 头文件包含目录

include C:\QT\OpenCV-3.0-android-sdk\sdk\native\jni\OpenCV.mk 

为OpenCV的库文件包含目录

三、使用OpenCV编译程序

snip..............................................

四、使用Android Native模式调试C++代码部分

snip.............................

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