/* DO NOT EDIT THIS FILE - it is machine generated */

#include <jni.h>

/* Header for class com_hoos_grayprocessing_OpencvClass */

​

#ifndef _Included_com_hoos_grayprocessing_OpencvClass

#define _Included_com_hoos_grayprocessing_OpencvClass

#ifdef __cplusplus

extern "C" {

#endif

/*

 * Class:     com_hoos_grayprocessing_OpencvClass

 * Method:    convertGray

 * Signature: (JJ)I

 */

JNIEXPORT jint JNICALL Java_com_hoos_grayprocessing_OpencvClass_convertGray

  (JNIEnv *, jclass, jlong, jlong);

​

#ifdef __cplusplus

}

#endif

#endif

//

// Created by HooS on 2017/8/14.

//

#include <com_hoos_grayprocessing_OpencvClass.h>

​

​

JNIEXPORT jint JNICALL Java_com_hoos_grayprocessing_OpencvClass_convertGray

  (JNIEnv *, jclass, jlong, jlong){

  }

//

// Created by HooS on 2017/8/14.

//

#include <com_hoos_grayprocessing_OpencvClass.h>

​

​

JNIEXPORT jint JNICALL Java_com_hoos_grayprocessing_OpencvClass_convertGray

  (JNIEnv *, jclass, jlong addrRgba, jlong addrGray){

  }

//

// Created by HooS on 2017/7/25.

//

#include <com_hoos_ndkopencvtest_OpencvNativeClass.h>

​

​

JNIEXPORT jint JNICALL Java_com_hoos_ndkopencvtest_OpencvNativeClass_convertGray

  (JNIEnv *, jclass, jlong addrRgba, jlong addrGray){

       // 实现jlong类型到Mat类型的转换

       Mat& mRgb = *(Mat*)addrRgba;

       Mat& mGray = *(Mat*)addrGray;

       // 定义 int 和 jint 类型来接收函数返回值

       int conv;

       jint retVal;

       // 此处调用了toGray函数来对图片进行灰度化处理

       conv = toGray(mRgb, mGray);

​

       retVal = (jint)conv;

       return retVal;

  }

// this is gray.cpp

#include "gray.h"

​

bool toGray(Mat img, Mat& gray)

{

    if (img.channels()  == 3)

            cvtColor(img, gray, CV_BGR2GRAY);

    else if (img.channels() == 4)

            cvtColor(img, gray, CV_BGRA2GRAY);

    else if (img.channels() == 1)

            gray = img;

    if(gray.rows == img.rows && gray.cols == img.cols)

        return true;

    else

        return false;

}

#include "gray.h"

​

using namespace cv;

using namespace std;

# this is Android.mk

​

LOCAL_PATH := $(call my-dir)

​

include $(CLEAR_VARS)

​

#opencv

OPENCVROOT:= D:/Usual/Android/OpenCV-2.4.9-android-sdk  #这句代码等号右边写上自己的OpenCV安卓开发包的位置

OPENCV_CAMERA_MODULES:=on

OPENCV_INSTALL_MODULES:=on

OPENCV_LIB_TYPE:=SHARED

​

#思考下，参考我的修改一下就好了

include D:/Usual/Android/OpenCV-2.4.9-android-sdk/sdk/native/jni/OpenCV.mk

​

#这里写上自己的开发需要的源文件, 我这里需要两个

LOCAL_SRC_FILES := com_hoos_grayprocessing_OpencvClass.cpp gray.cpp

​

​

#设置生成的so库的名字  前面的lib和后缀名不用写

LOCAL_MODULE := MyLibs

​

LOCAL_LDLIBS += -llog

​

include $(BUILD_SHARED_LIBRARY)

# this is Application.mk

​

APP_STL := gnustl_static

APP_CPPFLAGS := -frtti -fexceptions

​

#这句是设置生成的cpu指令类型，可以根据自己需求来设置生成的平台， 一般这两个就够了

APP_ABI := armeabi-v7a x86

​

APP_PLATFORM := android-8    #这句是设置最低安卓平台，可以不弄

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/activity_main"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="com.hoos.grayprocessing.MainActivity">

​

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Hello World!" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/activity_main"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="com.hoos.grayprocessing.MainActivity">

​

    <org.opencv.android.JavaCameraView

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:id="@+id/java_camera_view"

        />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.hoos.grayprocessing">

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

​

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

​

</manifest>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.hoos.grayprocessing">

    <uses-permission android:name="android.permission.CAMERA"/>

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

​

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

​

</manifest>

android.useDepredcatedNdk=true

apply plugin: 'com.android.application'

​

android {

    compileSdkVersion 26

    buildToolsVersion "26.0.1"

    defaultConfig {

        applicationId "com.hoos.grayprocessing"

        minSdkVersion 21

        targetSdkVersion 26

        versionCode 1

        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }

​

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}

​

dependencies {

    compile fileTree(include: ['*.jar'], dir: 'libs')

    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {

        exclude group: 'com.android.support', module: 'support-annotations'

    })

    compile 'com.android.support:appcompat-v7:26.0.0-alpha1'

    testCompile 'junit:junit:4.12'

    compile project(':openCVLibrary249')

}

​

apply plugin: 'com.android.application'

​

android {

    compileSdkVersion 26

    buildToolsVersion "26.0.1"

    defaultConfig {

        applicationId "com.hoos.grayprocessing"

        minSdkVersion 21

        targetSdkVersion 26

        versionCode 1

        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }

​

    sourceSets.main{

        jniLibs.srcDirs = ['src/main/libs']

        jni.srcDirs = []

    }

​

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}

​

dependencies {

    compile fileTree(include: ['*.jar'], dir: 'libs')

    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {

        exclude group: 'com.android.support', module: 'support-annotations'

    })

    compile 'com.android.support:appcompat-v7:26.0.0-alpha1'

    testCompile 'junit:junit:4.12'

    compile project(':openCVLibrary249')

}

​

package com.hoos.grayprocessing;

​

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

​

import org.opencv.android.BaseLoaderCallback;

import org.opencv.android.CameraBridgeViewBase;

import org.opencv.android.JavaCameraView;

import org.opencv.android.LoaderCallbackInterface;

import org.opencv.android.OpenCVLoader;

import org.opencv.core.CvType;

import org.opencv.core.Mat;

​

public class MainActivity extends AppCompatActivity implements CameraBridgeViewBase.CvCameraViewListener2{

    private static String TAG = "MainActivity";

    // 初始化一个实例，用来获取摄像头帧

    JavaCameraView javaCameraView;

    Mat mRgba;  // 用来存储原始摄像头数据

    Mat mGray;  // 用来存储灰度化后的帧数据

​

    // 静态加载之前生成的so库——Mylins

    static{

        System.loadLibrary("MyLibs");

    }

​

    // 回调开初始化帧数据

    BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {

        @Override

        public void onManagerConnected(int status) {

            switch(status){

                case BaseLoaderCallback.SUCCESS:

                    javaCameraView.enableView();

                    break;

                default:

                    super.onManagerConnected(status);

                    break;

            }

            super.onManagerConnected(status);

        }

    };

​

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

​

        // 与java_camera_view控件绑定

        javaCameraView = (JavaCameraView)findViewById(R.id.java_camera_view);

        javaCameraView.setVisibility(View.VISIBLE);

        javaCameraView.setCvCameraViewListener(this);

    }

​

    @Override

    protected void onPause(){

        super.onPause();

        if(javaCameraView!=null)

            javaCameraView.disableView();

    }

​

    protected void onDestroy(){

        super.onDestroy();

        if(javaCameraView!=null)

            javaCameraView.disableView();

    }

​

    // 判断是否加载成功OpenCV库

    protected void onResume(){

        super.onResume();

        if(OpenCVLoader.initDebug()){

            Log.i(TAG, "Opencv loaded successfully");

            mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);

        }

        else{

            Log.i(TAG, "Opencv not loaded");

            OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_9, this, mLoaderCallback);

        }

    }

​

    @Override

    public void onCameraViewStarted(int width, int height) {

        // 初始化这两个Mat类型

        mRgba = new Mat(height, width, CvType.CV_8UC4);

        mGray = new Mat(height, width, CvType.CV_8UC1);

    }

​

    @Override

    public void onCameraViewStopped() {

        mRgba.release();

    }

​

    @Override

    public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {

        // 得到摄像头原始帧数据

        mRgba = inputFrame.rgba();

        // 调用OpencvClass类的方法来对帧数据进行灰度化

        OpencvClass.convertGray(mRgba.getNativeObjAddr(), mGray.getNativeObjAddr());

​

        return mGray;

    }

}