Android,用javah生成jni头文件,显示无法找到的错误org.opencv.core.Mat

Question

当我在java类中编译本机方法javah生成JNI头文件时,我对jni有一个恼人的问题.

如果该类使用了第三方软件包,例如:org.opencv.core.Mat,那么javah将显示无法找到org.opencv.core.Mat类的错误.

OpenCV示例代码如下:

package org.opencv.samples.fd;

import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;

public class DetectionBasedTracker
{
public DetectionBasedTracker(String cascadeName, int minFaceSize) {
    mNativeObj = nativeCreateObject(cascadeName, minFaceSize);
}

public void start() {
    nativeStart(mNativeObj);
}

public void stop() {
    nativeStop(mNativeObj);
}

public void setMinFaceSize(int size) {
    nativeSetFaceSize(mNativeObj, size);
}

public void detect(Mat imageGray, MatOfRect faces) {
    nativeDetect(mNativeObj, imageGray.getNativeObjAddr(), faces.getNativeObjAddr());
}

public void release() {
    nativeDestroyObject(mNativeObj);
    mNativeObj = 0;
}

private long mNativeObj = 0;

private static native long nativeCreateObject(String cascadeName, int minFaceSize);
private static native void nativeDestroyObject(long thiz);
private static native void nativeStart(long thiz);
private static native void nativeStop(long thiz);
private static native void nativeSetFaceSize(long thiz, int size);
private static native void nativeDetect(long thiz, long inputImage, long faces);
}

首先,我使用了命令

javah -classpath bin/classes -bootclasspath (the directory of android.jar) -d jni (packageName + ClassName) , shows the error "can't find the org.opencv.core.Mat

然后我修改了命令

javah - classpath bin/classes - bootclasspath (the dir of android.jar) ; (the dir of the opencv lib jar)  -d jni ..." ", this time it shows error

例外

Exception in thread "main" java.lang.IllegalArgumentException: Not a valid class
 name: E:\Computer_Language\Java\soft_android\OpenCV-2.4.3-rc-android-sdk\OpenCV
-2.4.3-rc-android-sdk\sdk\java\bin\opencv library - 2.4.3.jar
    at com.sun.tools.javac.api.JavacTool.getTask(JavacTool.java:177)
    at com.sun.tools.javac.api.JavacTool.getTask(JavacTool.java:68)
    at com.sun.tools.javah.JavahTask.run(JavahTask.java:509)
    at com.sun.tools.javah.JavahTask.run(JavahTask.java:335)
    at com.sun.tools.javah.Main.main(Main.java:46)

我认为,添加opencv lib目录-bootclasspath是有用且必要的.错误是因为我只是添加了两个路径-bootclasspath或格式是错误的？

真的很困惑.请给点帮助,谢谢!

Answer 1

这就是我做的:

1.打开命令行,键入(project)/ bin/classes:2.type:javah -classpath(opencv4android sdk path)/ java/bin/classes :(你的项目位置)/ bin/classes -jni(你的java)包含本机库接口的类文件)

在我的项目中.我做了:

javah -classpath/home/zijun/Dev/adt/OpencvAndroid/sdk/java/bin/classes:/ home/zijun/workspace/LocTM/bin/classes -jni com.brainport.loctm.TMatching

这适用于Linux Ubuntu 12.04.02 64位操作系统