使用Java api 和 jni混合方式调用OpenCV
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使用Java api 和 jni混合方式调用OpenCV
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from: http://blog.csdn.net/lingyun_blog/article/details/50733331
int a =b;
如果想在項目中直接使用opencv的java api 并且也需要自己編寫c++，那么就需要Java Api與Jni混用，下面就以人臉檢測為例，實驗一些混合方式 一、創(chuàng)建項目 創(chuàng)建項目FaceDetection
二、添加opencv的java api 1、再項目中創(chuàng)建文件夾libopencv用來存放opencv的庫module 2、將 Android/OpenCV-android-sdk/sdk/java?復(fù)制到libopencv目錄中，并將其改名opencv ? 3、打開settings.gradle添加include?':libopencv:opencv’并點擊Sync Now 4、在opencv中創(chuàng)建build.gradle文件，并將以下內(nèi)容復(fù)制進去，注意按要求替換內(nèi)容，然后點擊Sync Now apply?plugin:'android-library'
buildscript{ ? ? repositories{ ? ? ? ? mavenCentral() ? ? } ? ? dependencies{ ? ? ? ? classpath?'com.android.tools.build:gradle:1.3.0'?//?和項目/build.gradle中的一致 ? ? } }
android{ ? ? compileSdkVersion?22? ? ? ? ? ?//與?app/build.gradle中的一致 ? ? buildToolsVersion?"22.0.1"? ? ? ?//與?app/build.gradle中的一致
? ? defaultConfig?{ ? ? ? ? minSdkVersion?15? ? ? ? ? ? ?//與?app/build.gradle中的一致 ? ? ? ? targetSdkVersion?22? ? ? ? ?//與?app/build.gradle中的一致 ? ? ? ? versionCode?2411? ? ? ? ? ?//改成自己下的opencv的版本 ? ? ? ? versionName?"2.4.11"? ? ? ?//改成自己下的opencv的版本 ? ? }
? ? sourceSets{ ? ? ? ? main{ ? ? ? ? ? ? manifest.srcFile?'AndroidManifest.xml' ? ? ? ? ? ? java.srcDirs?=?['src'] ? ? ? ? ? ? resources.srcDirs?=?['src'] ? ? ? ? ? ? res.srcDirs?=?['res'] ? ? ? ? ? ? aidl.srcDirs?=?['src'] ? ? ? ? } ? ? } } 5、為app添加opencv依賴，在app上右鍵 open module settings,將opencv加進去
三、添加Opencv Face Detection Jni 1、打開opencv提供的人臉識別示例，將samples/face-detectioin/src/org/opencv/samples/facedetect/DetectionBasedTracker.java文件拷貝到app中包下，注意java文件package修改成當(dāng)前的包 錯誤是因為并沒有native文件與之關(guān)聯(lián) 2、在app中創(chuàng)建autojavah.sh文件，用來創(chuàng)建jni文件夾及.h文件，內(nèi)容如下：
#!/bin/sh
export?ProjectPath=$(cd?"../$(dirname?"$1")";?pwd) export?TargetClassName="com.lingyun.facedetection.DetectionBasedTracker"?#換成你的包名.含有native方法的類名 export?SourceFile="${ProjectPath}/app/src/main/java"? ?#java源文件目錄 export?TargetPath="${ProjectPath}/app/src/main/jni"? ? ?#輸出jni文件目錄 cd?"${SourceFile}"
javah?-d?${TargetPath}?-classpath?"${SourceFile}"?"${TargetClassName}"
echo?-d?${TargetPath}?-classpath?"${SourceFile}"?"${TargetClassName}"
3、右鍵運行autojavah.sh文件，如果沒有插件，android Studio會提示是否下載安裝插件 此時可以看到多了jni目錄以及一個.h文件
4、將 OpenCV-android-sdk/samples/face-detection/jni中的.cpp 和.mk文件復(fù)制到j(luò)ni目錄中 修改.cpp中的include頭文件#include?<com_lingyun_facedetection_DetectionBasedTracker.h> 修改函數(shù)名為.h中的函數(shù)名，這里有6個函數(shù) 修改Android.mk文件： LOCAL_PATH?:=?$(call?my-dir) include?$(CLEAR_VARS) OPENCV_CAMERA_MODULES:=on OPENCV_INSTALL_MODULES:=off OPENCV_LIB_TYPE:=STATIC 下面一行換成自己的opencvsdk include?/Users/lichuanpeng/Documents/Program_File/Android/OpenCV-android-sdk/sdk/native/jni/OpenCV.mk LOCAL_SRC_FILES? :=?DetectionBasedTracker_jni.cpp LOCAL_C_INCLUDES?+=?$(LOCAL_PATH) LOCAL_LDLIBS? ? ?+=?-lm?-llog LOCAL_MODULE? ? ?:=?detection_based_tracker include?$(BUILD_SHARED_LIBRARY) 修改Application.mk文件 APP_STL:=gnustl_static APP_CPPFLAGS:=-frtti?-fexceptions APP_ABI?:=?armeabi?armeabi-v7a?x86?mips APP_PLATFORM?:=?android-8
5、配置app的build.gradle 我的配置是 apply?plugin:?'com.android.application'
android?{ ? ? compileSdkVersion?22 ? ? buildToolsVersion?"22.0.1"
? ? defaultConfig?{ ? ? ? ? applicationId?"com.lingyun.facedetecttest" ? ? ? ? minSdkVersion?15 ? ? ? ? targetSdkVersion?22 ? ? ? ? versionCode?1 ? ? ? ? versionName?"1.0" ? ? ? ? ? 這是添加的
? ? ? ? ndk{ ? ? ? ? ? ? moduleName?"app" ? ? ? ? } ? ? } ? ? ? 這是添加的 ? ? sourceSets.main?{ ? ? ? ? jniLibs.srcDir?'src/main/jnilibs' ? ? ? ? jni.srcDirs?=?[]?//disable?automatic?ndk-build?call ? ? }
? ? buildTypes?{ ? ? ? ? release?{ ? ? ? ? ? ? minifyEnabled?false ? ? ? ? ? ? proguardFiles?getDefaultProguardFile('proguard-android.txt'),?'proguard-rules.pro' ? ? ? ? } ? ? }
}
dependencies?{ ? ? compile?fileTree(dir:?'libs',?include:?['*.jar']) ? ? compile?'com.android.support:appcompat-v7:22+' ? ? compile?project(':opencvlibs:opencv') }
6、新增NDK_BUILD 工具 點擊Android Studio->Preferences->External Tools 點擊+新增 新增?NDK?Build Name:?NDK?Build Group:?NDK Description:?NDK?Build Options:?全打勾 Show?in:?全打勾 Tools?Settings: Program:?NDK目錄/ndk-build Parameters:?NDK_PROJECT_PATH=$ModuleFileDir$/build/intermediates/ndk?NDK_LIBS_OUT=$ModuleFileDir$/src/main/jniLibs?NDK_APPLICATION_MK=$ModuleFileDir$/src/main/jni/Application.mk?APP_BUILD_SCRIPT=$ModuleFileDir$/src/main/jni/Android.mk?V=1 Working?directory:?$SourcepathEntry$?
7、在app上右鍵點擊NDK NDK Build 可以看到多出來jniLibs目錄 8、將 OpenCV-android-sdk/sdk/native/libs??目錄里面四個文件夾中的libopencv_java.so分別對應(yīng)放在剛才生成的目錄中，因為java api需要這些。
四、添加布局文件及activity和權(quán)限 1、將 OpenCV-android-sdk/samples/face-detection/res/layout/face_detect_surface_view.xml?文件復(fù)制到app中的layout目錄中 2、在res中創(chuàng)建raw目錄,并將 OpenCV-android-sdk/samples/face-detection/res/raw/lbpcascade_frontalface.xml?文件復(fù)制到raw中 3、修改MainActivity ? ? ?
[java] view plaincopyimport?java.io.File;?? import?java.io.FileOutputStream;?? import?java.io.IOException;?? import?java.io.InputStream;?? ?? import?org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame;?? import?org.opencv.android.OpenCVLoader;?? import?org.opencv.core.Core;?? import?org.opencv.core.Mat;?? import?org.opencv.core.MatOfRect;?? import?org.opencv.core.Rect;?? import?org.opencv.core.Scalar;?? import?org.opencv.core.Size;?? import?org.opencv.android.CameraBridgeViewBase;?? import?org.opencv.android.CameraBridgeViewBase.CvCameraViewListener2;?? import?org.opencv.objdetect.CascadeClassifier;?? ?? import?android.content.Context;?? import?android.os.Bundle;?? import?android.support.v7.app.AppCompatActivity;?? import?android.util.Log;?? import?android.view.Menu;?? import?android.view.MenuItem;?? import?android.view.WindowManager;?? import?com.lingyun.facedetection.R;?? ?? public?class?MainActivity?extends?AppCompatActivity?implements?CvCameraViewListener2{?? ?? ????private?static?final?String????TAG?????????????????=?"OCVSample::Activity";?? ????private?static?final?Scalar????FACE_RECT_COLOR?????=?new?Scalar(0,?255,?0,?255);?? ????public?static?final?int????????JAVA_DETECTOR???????=?0;?? ????public?static?final?int????????NATIVE_DETECTOR?????=?1;?? ?? ????private?MenuItem???????????????mItemFace50;?? ????private?MenuItem???????????????mItemFace40;?? ????private?MenuItem???????????????mItemFace30;?? ????private?MenuItem???????????????mItemFace20;?? ????private?MenuItem???????????????mItemType;?? ?? ????private?Mat????????????????????mRgba;?? ????private?Mat????????????????????mGray;?? ????private?File???????????????????mCascadeFile;?? ????private?CascadeClassifier??????mJavaDetector;?? ????private?DetectionBasedTracker??mNativeDetector;?? ?? ????private?int????????????????????mDetectorType???????=?JAVA_DETECTOR;?? ????private?String[]???????????????mDetectorName;?? ?? ????private?float??????????????????mRelativeFaceSize???=?0.2f;?? ????private?int????????????????????mAbsoluteFaceSize???=?0;?? ?? ????private?CameraBridgeViewBase???mOpenCvCameraView;?? ?? ????static?{?? ????????if(!OpenCVLoader.initDebug()){?? ????????????Log.d("MyDebug","Falied");?? ????????}else{?? ????????????Log.d("MyDebug","success");?? ????????????System.loadLibrary("opencv_java");?? ????????}?? ????}?? ?? ????public?void?doDetect(){?? ????????//?Load?native?library?after(!)?OpenCV?initialization?? ????????System.loadLibrary("detection_based_tracker");//?? ?? ????????try?{?? ????????????//?load?cascade?file?from?application?resources?? ????????????InputStream?is?=?getResources().openRawResource(R.raw.lbpcascade_frontalface);?? ????????????File?cascadeDir?=?getDir("cascade",?Context.MODE_PRIVATE);?? ????????????mCascadeFile?=?new?File(cascadeDir,?"lbpcascade_frontalface.xml");?? ????????????FileOutputStream?os?=?new?FileOutputStream(mCascadeFile);?? ?? ????????????byte[]?buffer?=?new?byte[4096];?? ????????????int?bytesRead;?? ????????????while?((bytesRead?=?is.read(buffer))?!=?-1)?{?? ????????????????os.write(buffer,?0,?bytesRead);?? ????????????}?? ????????????is.close();?? ????????????os.close();?? ?? ????????????mJavaDetector?=?new?CascadeClassifier(mCascadeFile.getAbsolutePath());?? ????????????if?(mJavaDetector.empty())?{?? ????????????????Log.e(TAG,?"Failed?to?load?cascade?classifier");?? ????????????????mJavaDetector?=?null;?? ????????????}?else?? ????????????????Log.i(TAG,?"Loaded?cascade?classifier?from?"?+?mCascadeFile.getAbsolutePath());?? ?? ????????????mNativeDetector?=?new?DetectionBasedTracker(mCascadeFile.getAbsolutePath(),?0);?? ?? ????????????cascadeDir.delete();?? ?? ????????}?catch?(IOException?e)?{?? ????????????e.printStackTrace();?? ????????????Log.e(TAG,?"Failed?to?load?cascade.?Exception?thrown:?"?+?e);?? ????????}?? ?? ????????mOpenCvCameraView.enableView();?? ????}?? ?? ????public?MainActivity()?{?? ????????mDetectorName?=?new?String[2];?? ????????mDetectorName[JAVA_DETECTOR]?=?"Java";?? ????????mDetectorName[NATIVE_DETECTOR]?=?"Native?(tracking)";?? ?? ????????Log.i(TAG,?"Instantiated?new?"?+?this.getClass());?? ????}?? ?? ????/**?Called?when?the?activity?is?first?created.?*/?? ????@Override?? ????public?void?onCreate(Bundle?savedInstanceState)?{?? ????????Log.i(TAG,?"called?onCreate");?? ????????super.onCreate(savedInstanceState);?? ????????getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);?? ?? ????????setContentView(R.layout.face_detect_surface_view);?? ?? ????????mOpenCvCameraView?=?(CameraBridgeViewBase)?findViewById(R.id.fd_activity_surface_view);?? ????????mOpenCvCameraView.setCvCameraViewListener(this);?? ????????doDetect();?? ????}?? ?? ????@Override?? ????public?void?onPause()?? ????{?? ????????super.onPause();?? ????????if?(mOpenCvCameraView?!=?null)?? ????????????mOpenCvCameraView.disableView();?? ????}?? ?? ????@Override?? ????public?void?onResume()?? ????{?? ????????super.onResume();?? ????????//?OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3,?this,?mLoaderCallback);?? ????}?? ?? ????public?void?onDestroy()?{?? ????????super.onDestroy();?? ????????mOpenCvCameraView.disableView();?? ????}?? ?? ????public?void?onCameraViewStarted(int?width,?int?height)?{?? ????????mGray?=?new?Mat();?? ????????mRgba?=?new?Mat();?? ????}?? ?? ????public?void?onCameraViewStopped()?{?? ????????mGray.release();?? ????????mRgba.release();?? ????}?? ?? ????public?Mat?onCameraFrame(CvCameraViewFrame?inputFrame)?{?? ?? ????????mRgba?=?inputFrame.rgba();?? ????????mGray?=?inputFrame.gray();?? ?? ????????if?(mAbsoluteFaceSize?==?0)?{?? ????????????int?height?=?mGray.rows();?? ????????????if?(Math.round(height?*?mRelativeFaceSize)?>?0)?{?? ????????????????mAbsoluteFaceSize?=?Math.round(height?*?mRelativeFaceSize);?? ????????????}?? ????????????mNativeDetector.setMinFaceSize(mAbsoluteFaceSize);?? ????????}?? ?? ????????MatOfRect?faces?=?new?MatOfRect();?? ?? ????????if?(mDetectorType?==?JAVA_DETECTOR)?{?? ????????????if?(mJavaDetector?!=?null)?? ????????????????mJavaDetector.detectMultiScale(mGray,?faces,?1.1,?2,?2,?//?TODO:?objdetect.CV_HAAR_SCALE_IMAGE?? ????????????????????????new?Size(mAbsoluteFaceSize,?mAbsoluteFaceSize),?new?Size());?? ????????}?? ????????else?if?(mDetectorType?==?NATIVE_DETECTOR)?{?? ????????????if?(mNativeDetector?!=?null)?? ????????????????mNativeDetector.detect(mGray,?faces);?? ????????}?? ????????else?{?? ????????????Log.e(TAG,?"Detection?method?is?not?selected!");?? ????????}?? ?? ????????Rect[]?facesArray?=?faces.toArray();?? ????????for?(int?i?=?0;?i?<?facesArray.length;?i++)?? ????????????Core.rectangle(mRgba,?facesArray[i].tl(),?facesArray[i].br(),?FACE_RECT_COLOR,?3);?? ?? ????????return?mRgba;?? ????}?? ?? ????@Override?? ????public?boolean?onCreateOptionsMenu(Menu?menu)?{?? ????????Log.i(TAG,?"called?onCreateOptionsMenu");?? ????????mItemFace50?=?menu.add("Face?size?50%");?? ????????mItemFace40?=?menu.add("Face?size?40%");?? ????????mItemFace30?=?menu.add("Face?size?30%");?? ????????mItemFace20?=?menu.add("Face?size?20%");?? ????????mItemType???=?menu.add(mDetectorName[mDetectorType]);?? ????????return?true;?? ????}?? ?? ????@Override?? ????public?boolean?onOptionsItemSelected(MenuItem?item)?{?? ????????Log.i(TAG,?"called?onOptionsItemSelected;?selected?item:?"?+?item);?? ????????if?(item?==?mItemFace50)?? ????????????setMinFaceSize(0.5f);?? ????????else?if?(item?==?mItemFace40)?? ????????????setMinFaceSize(0.4f);?? ????????else?if?(item?==?mItemFace30)?? ????????????setMinFaceSize(0.3f);?? ????????else?if?(item?==?mItemFace20)?? ????????????setMinFaceSize(0.2f);?? ????????else?if?(item?==?mItemType)?{?? ????????????int?tmpDetectorType?=?(mDetectorType?+?1)?%?mDetectorName.length;?? ????????????item.setTitle(mDetectorName[tmpDetectorType]);?? ????????????setDetectorType(tmpDetectorType);?? ????????}?? ????????return?true;?? ????}?? ?? ????private?void?setMinFaceSize(float?faceSize)?{?? ????????mRelativeFaceSize?=?faceSize;?? ????????mAbsoluteFaceSize?=?0;?? ????}?? ?? ????private?void?setDetectorType(int?type)?{?? ????????if?(mDetectorType?!=?type)?{?? ????????????mDetectorType?=?type;?? ?? ????????????if?(type?==?NATIVE_DETECTOR)?{?? ????????????????Log.i(TAG,?"Detection?Based?Tracker?enabled");?? ????????????????mNativeDetector.start();?? ????????????}?else?{?? ????????????????Log.i(TAG,?"Cascade?detector?enabled");?? ????????????????mNativeDetector.stop();?? ????????????}?? ????????}?? ????}?? ?????}??
4、添加攝像機權(quán)限 [html] view plaincopy<?xml?version="1.0"?encoding="utf-8"?>?? <manifest?xmlns:android="http://schemas.android.com/apk/res/android"?? ????package="com.lingyun.facedetection"?>?? ?? ????<application?? ????????android:allowBackup="true"?? ????????android:icon="@mipmap/ic_launcher"?? ????????android:label="@string/app_name"?? ????????android:theme="@style/AppTheme"?>?? ????????<activity?? ????????????android:name=".MainActivity"?? ????????????android:label="@string/app_name"?>?? ????????????<intent-filter>?? ????????????????<action?android:name="android.intent.action.MAIN"?/>?? ?? ????????????????<category?android:name="android.intent.category.LAUNCHER"?/>?? ????????????</intent-filter>?? ????????</activity>?? ????</application>?? ????<supports-screens?android:resizeable="true"?? ????????android:smallScreens="true"?? ????????android:normalScreens="true"?? ????????android:largeScreens="true"?? ????????android:anyDensity="true"?/>?? ?? ????<uses-sdk?android:minSdkVersion="8"?/>?? ?? ????<uses-permission?android:name="android.permission.CAMERA"/>?? ?? ????<uses-feature?android:name="android.hardware.camera"?android:required="false"/>?? ????<uses-feature?android:name="android.hardware.camera.autofocus"?android:required="false"/>?? ????<uses-feature?android:name="android.hardware.camera.front"?android:required="false"/>?? ????<uses-feature?android:name="android.hardware.camera.front.autofocus"?android:required="false"/>?? ?? </manifest>??
五、調(diào)試 ? ? ?運行項目 ? ?
int a =b;
如果想在項目中直接使用opencv的java api 并且也需要自己編寫c++，那么就需要Java Api與Jni混用，下面就以人臉檢測為例，實驗一些混合方式 一、創(chuàng)建項目 創(chuàng)建項目FaceDetection
二、添加opencv的java api 1、再項目中創(chuàng)建文件夾libopencv用來存放opencv的庫module 2、將 Android/OpenCV-android-sdk/sdk/java?復(fù)制到libopencv目錄中，并將其改名opencv ? 3、打開settings.gradle添加include?':libopencv:opencv’并點擊Sync Now 4、在opencv中創(chuàng)建build.gradle文件，并將以下內(nèi)容復(fù)制進去，注意按要求替換內(nèi)容，然后點擊Sync Now apply?plugin:'android-library'
buildscript{ ? ? repositories{ ? ? ? ? mavenCentral() ? ? } ? ? dependencies{ ? ? ? ? classpath?'com.android.tools.build:gradle:1.3.0'?//?和項目/build.gradle中的一致 ? ? } }
android{ ? ? compileSdkVersion?22? ? ? ? ? ?//與?app/build.gradle中的一致 ? ? buildToolsVersion?"22.0.1"? ? ? ?//與?app/build.gradle中的一致
? ? defaultConfig?{ ? ? ? ? minSdkVersion?15? ? ? ? ? ? ?//與?app/build.gradle中的一致 ? ? ? ? targetSdkVersion?22? ? ? ? ?//與?app/build.gradle中的一致 ? ? ? ? versionCode?2411? ? ? ? ? ?//改成自己下的opencv的版本 ? ? ? ? versionName?"2.4.11"? ? ? ?//改成自己下的opencv的版本 ? ? }
? ? sourceSets{ ? ? ? ? main{ ? ? ? ? ? ? manifest.srcFile?'AndroidManifest.xml' ? ? ? ? ? ? java.srcDirs?=?['src'] ? ? ? ? ? ? resources.srcDirs?=?['src'] ? ? ? ? ? ? res.srcDirs?=?['res'] ? ? ? ? ? ? aidl.srcDirs?=?['src'] ? ? ? ? } ? ? } } 5、為app添加opencv依賴，在app上右鍵 open module settings,將opencv加進去
三、添加Opencv Face Detection Jni 1、打開opencv提供的人臉識別示例，將samples/face-detectioin/src/org/opencv/samples/facedetect/DetectionBasedTracker.java文件拷貝到app中包下，注意java文件package修改成當(dāng)前的包 錯誤是因為并沒有native文件與之關(guān)聯(lián) 2、在app中創(chuàng)建autojavah.sh文件，用來創(chuàng)建jni文件夾及.h文件，內(nèi)容如下：
#!/bin/sh
export?ProjectPath=$(cd?"../$(dirname?"$1")";?pwd) export?TargetClassName="com.lingyun.facedetection.DetectionBasedTracker"?#換成你的包名.含有native方法的類名 export?SourceFile="${ProjectPath}/app/src/main/java"? ?#java源文件目錄 export?TargetPath="${ProjectPath}/app/src/main/jni"? ? ?#輸出jni文件目錄 cd?"${SourceFile}"
javah?-d?${TargetPath}?-classpath?"${SourceFile}"?"${TargetClassName}"
echo?-d?${TargetPath}?-classpath?"${SourceFile}"?"${TargetClassName}"
3、右鍵運行autojavah.sh文件，如果沒有插件，android Studio會提示是否下載安裝插件 此時可以看到多了jni目錄以及一個.h文件
4、將 OpenCV-android-sdk/samples/face-detection/jni中的.cpp 和.mk文件復(fù)制到j(luò)ni目錄中 修改.cpp中的include頭文件#include?<com_lingyun_facedetection_DetectionBasedTracker.h> 修改函數(shù)名為.h中的函數(shù)名，這里有6個函數(shù) 修改Android.mk文件： LOCAL_PATH?:=?$(call?my-dir) include?$(CLEAR_VARS) OPENCV_CAMERA_MODULES:=on OPENCV_INSTALL_MODULES:=off OPENCV_LIB_TYPE:=STATIC 下面一行換成自己的opencvsdk include?/Users/lichuanpeng/Documents/Program_File/Android/OpenCV-android-sdk/sdk/native/jni/OpenCV.mk LOCAL_SRC_FILES? :=?DetectionBasedTracker_jni.cpp LOCAL_C_INCLUDES?+=?$(LOCAL_PATH) LOCAL_LDLIBS? ? ?+=?-lm?-llog LOCAL_MODULE? ? ?:=?detection_based_tracker include?$(BUILD_SHARED_LIBRARY) 修改Application.mk文件 APP_STL:=gnustl_static APP_CPPFLAGS:=-frtti?-fexceptions APP_ABI?:=?armeabi?armeabi-v7a?x86?mips APP_PLATFORM?:=?android-8
5、配置app的build.gradle 我的配置是 apply?plugin:?'com.android.application'
android?{ ? ? compileSdkVersion?22 ? ? buildToolsVersion?"22.0.1"
? ? defaultConfig?{ ? ? ? ? applicationId?"com.lingyun.facedetecttest" ? ? ? ? minSdkVersion?15 ? ? ? ? targetSdkVersion?22 ? ? ? ? versionCode?1 ? ? ? ? versionName?"1.0" ? ? ? ? ? 這是添加的
? ? ? ? ndk{ ? ? ? ? ? ? moduleName?"app" ? ? ? ? } ? ? } ? ? ? 這是添加的 ? ? sourceSets.main?{ ? ? ? ? jniLibs.srcDir?'src/main/jnilibs' ? ? ? ? jni.srcDirs?=?[]?//disable?automatic?ndk-build?call ? ? }
? ? buildTypes?{ ? ? ? ? release?{ ? ? ? ? ? ? minifyEnabled?false ? ? ? ? ? ? proguardFiles?getDefaultProguardFile('proguard-android.txt'),?'proguard-rules.pro' ? ? ? ? } ? ? }
}
dependencies?{ ? ? compile?fileTree(dir:?'libs',?include:?['*.jar']) ? ? compile?'com.android.support:appcompat-v7:22+' ? ? compile?project(':opencvlibs:opencv') }
6、新增NDK_BUILD 工具 點擊Android Studio->Preferences->External Tools 點擊+新增 新增?NDK?Build Name:?NDK?Build Group:?NDK Description:?NDK?Build Options:?全打勾 Show?in:?全打勾 Tools?Settings: Program:?NDK目錄/ndk-build Parameters:?NDK_PROJECT_PATH=$ModuleFileDir$/build/intermediates/ndk?NDK_LIBS_OUT=$ModuleFileDir$/src/main/jniLibs?NDK_APPLICATION_MK=$ModuleFileDir$/src/main/jni/Application.mk?APP_BUILD_SCRIPT=$ModuleFileDir$/src/main/jni/Android.mk?V=1 Working?directory:?$SourcepathEntry$?
7、在app上右鍵點擊NDK NDK Build 可以看到多出來jniLibs目錄 8、將 OpenCV-android-sdk/sdk/native/libs??目錄里面四個文件夾中的libopencv_java.so分別對應(yīng)放在剛才生成的目錄中，因為java api需要這些。
四、添加布局文件及activity和權(quán)限 1、將 OpenCV-android-sdk/samples/face-detection/res/layout/face_detect_surface_view.xml?文件復(fù)制到app中的layout目錄中 2、在res中創(chuàng)建raw目錄,并將 OpenCV-android-sdk/samples/face-detection/res/raw/lbpcascade_frontalface.xml?文件復(fù)制到raw中 3、修改MainActivity ? ? ?
[java] view plaincopy
4、添加攝像機權(quán)限 [html] view plaincopy
五、調(diào)試 ? ? ?運行項目 ? ?
總結(jié)
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