Android引入OpenCV的示例

externalNativeBuild {  cmake {    //arguments '-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=gnustl_static'    cppFlags "-std=c++11","-frtti", "-fexceptions"  }}ndk{  abiFilters 'armeabi-v7a'}

# For more information about using CMake with Android Studio, read the# documentation: https://d.android.com/studio/projects/add-native-code.html# Sets the minimum version of CMake required to build the native library.cmake_minimum_required(VERSION 3.4.1)# Creates and names a library, sets it as either STATIC# or SHARED, and provides the relative paths to its source code.# You can define multiple libraries, and CMake builds them for you.# Gradle automatically packages shared libraries with your APK.set(CMAKE_VERBOSE_MAKEFILE on)set(libs "${CMAKE_SOURCE_DIR}/src/main/jniLibs")include_directories(${CMAKE_SOURCE_DIR}/src/main/cpp/include)add_library(libopencv_java3 SHARED IMPORTED )set_target_properties(libopencv_java3 PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_java3.so")add_library(libopencv_calib3d STATIC IMPORTED )set_target_properties(libopencv_calib3d PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_calib3d.a")add_library(libopencv_core STATIC IMPORTED )set_target_properties(libopencv_core PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_core.a")add_library(libopencv_features2d STATIC IMPORTED )set_target_properties(libopencv_features2d PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_features2d.a")add_library(libopencv_flann STATIC IMPORTED )set_target_properties(libopencv_flann PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_flann.a")add_library(libopencv_highgui STATIC IMPORTED )set_target_properties(libopencv_highgui PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_highgui.a")add_library(libopencv_imgcodecs STATIC IMPORTED )set_target_properties(libopencv_imgcodecs PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_imgcodecs.a")add_library(libopencv_imgproc STATIC IMPORTED )set_target_properties(libopencv_imgproc PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_imgproc.a")add_library(libopencv_ml STATIC IMPORTED )set_target_properties(libopencv_ml PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_ml.a")add_library(libopencv_objdetect STATIC IMPORTED )set_target_properties(libopencv_objdetect PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_objdetect.a")add_library(libopencv_photo STATIC IMPORTED )set_target_properties(libopencv_photo PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_photo.a")add_library(libopencv_shape STATIC IMPORTED )set_target_properties(libopencv_shape PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_shape.a")add_library(libopencv_stitching STATIC IMPORTED )set_target_properties(libopencv_stitching PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_stitching.a")add_library(libopencv_superres STATIC IMPORTED )set_target_properties(libopencv_superres PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_superres.a")add_library(libopencv_video STATIC IMPORTED )set_target_properties(libopencv_video PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_video.a")add_library(libopencv_videoio STATIC IMPORTED )set_target_properties(libopencv_videoio PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_videoio.a")add_library(libopencv_videostab STATIC IMPORTED )set_target_properties(libopencv_videostab PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_videostab.a")add_library(libopencv_ts STATIC IMPORTED )set_target_properties(libopencv_ts PROPERTIES  IMPORTED_LOCATION "${libs}/${ANDROID_ABI}/libopencv_ts.a")set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11 -fexceptions -frtti")#include_directories(D:/Projects/Android/CLMAndroid/OpenCV-android-sdk/sdk/native/jni/include )#set(OpenCV_DIR D:/Projects/Android/CLMAndroid/OpenCV-android-sdk/sdk/native/jni)#find_package(OpenCV REQUIRED)#target_link_libraries(${OpenCV_LIBS})add_library( # Sets the name of the library.       native-lib       # Sets the library as a shared library.       SHARED       # Provides a relative path to your source file(s).       src/main/cpp/native-lib.cpp )# Searches for a specified prebuilt library and stores the path as a# variable. Because CMake includes system libraries in the search path by# default, you only need to specify the name of the public NDK library# you want to add. CMake verifies that the library exists before# completing its build.find_library( # Sets the name of the path variable.       log-lib       # Specifies the name of the NDK library that       # you want CMake to locate.       log )# Specifies libraries CMake should link to your target library. You# can link multiple libraries, such as libraries you define in this# build script, prebuilt third-party libraries, or system libraries.target_link_libraries( # Specifies the target library.            native-lib android log  libopencv_java3 libopencv_calib3d libopencv_core libopencv_features2d libopencv_flann libopencv_highgui libopencv_imgcodecs  libopencv_imgproc libopencv_ml libopencv_objdetect libopencv_photo libopencv_shape libopencv_stitching libopencv_superres  libopencv_video libopencv_videoio libopencv_videostab            # Links the target library to the log library            # included in the NDK.            ${log-lib} )

#include <jni.h>#include <string>#include <opencv2/opencv.hpp>#include <bits/stdc++.h>#include <android/log.h>#include<opencv2/core/core.hpp>#include"opencv2/imgproc/imgproc.hpp"using namespace cv;using namespace std;#define MAKE_ARGB(a, r, g, b) ((a&0xff)<<24) | ((r&0xff)<<16) | ((g&0xff)<<8) | (b&0xff)#define MAKE_RGB565(r, g, b) ((((r) >> 3) << 11) | (((g) >> 2) << 5) | ((b) >> 3))extern "C"{  JNIEXPORT jintArray JNICALL  Java_com_live_longsiyang_opencvdemo_OpenCVNativeManager_getBlurImage(JNIEnv *env, jobject thiz,                                     jintArray pixels_, jint w,                                     jint h) {    int colorType = CV_8UC4;      jint *pixels = env->GetIntArrayElements(pixels_, NULL);      Mat imgMat(h, w, colorType, pixels);      Mat out(h, w, colorType);    blur(imgMat, out, Size(20, 20));      env->ReleaseIntArrayElements(pixels_, pixels, 0);      int *outIntImage = new int[w * h];      for (int i = 0; i < w * h; i++) {      int a, r, g, b;      for (int j = 0; j < 4; j++) {        a = out.data[i * 4 + 3];        r = out.data[i * 4 + 2];        g = out.data[i * 4 + 1];        b = out.data[i * 4 + 0];        outIntImage[i] = (int) out.data[i * 4 + j];      }      outIntImage[i] = MAKE_ARGB(a,r,g,b);      }      jintArray result = env->NewIntArray(w * h);      env->SetIntArrayRegion(result, 0, w * h, outIntImage);    return result;    }}

import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;public class MainActivity extends AppCompatActivity {  static {    System.loadLibrary("native-lib");  }  ImageView mIvTest;  Button mBtnTest;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    mIvTest = (ImageView) findViewById(R.id.img_test);    mIvTest.setImageResource(R.drawable.beauty_steward_course_video_thumb_icon);    mBtnTest = (Button) findViewById(R.id.btn_test);    mBtnTest.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        Bitmap srcBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.beauty_steward_course_video_thumb_icon);        int w = srcBitmap.getWidth();        int h = srcBitmap.getHeight();        int[] pixels = new int[w*h];        srcBitmap.getPixels(pixels,0,w,0,0,w,h);        int[] outPixels = OpenCVNativeManager.getBlurImage(pixels ,w,h);        Bitmap destBitmap = Bitmap.createBitmap(w,h, Bitmap.Config.ARGB_8888);        destBitmap.setPixels(outPixels,0,w,0,0,w,h);        mIvTest.setImageBitmap(destBitmap);      }    });    findViewById(R.id.btn_reset).setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        mIvTest.setImageResource(R.drawable.beauty_steward_course_video_thumb_icon);      }    });  }}

android {  ...  sourceSets {    main {      jniLibs.srcDirs = ['src/main/jniLibs']      aidl.srcDirs = ['src/main/aidl']    }  }}

System.loadLibrary("native-lib");