Error: Class org.opencv.core.Mat could not be found

问题

When i generating header file with JNI using 'javah' it shows

Error: Class org.opencv.core.Mat could not be found.

System: Mac OSX

Using: Android Studio and opencv 3.1 for android

Commandline:

javah -classpath /Users/lumeng/Library/Android/sdk/platforms/android-23/android.jar:. com.lumenghz.test.OpencvHelper

Who can help me?

Edit-1 I also tried

javah -d ~/Documents/androidworkspace/RumenTest/test/src/main/jni -classpath /Users/lumeng/Library/Android/sdk/platforms/android-23/android.jar:. com.lumenghz.test.OpencvHelper

But still got the same error:

Error: Class org.opencv.core.Mat could not be found.

回答1:

You are giving wrong class path here:

com.lumenghz.test.OpencvHelper

Give full class path like this:

~/Documents/androidworkspace/RumenTest/openCVLibrary310/build/intermediates/classes/debug:. com.lumenghz.test.OpencvHelper

  javah -d (JNI Folder Location) -classpath (JAR Locaion);(class Path)

example as per your paths-

 javah -d ~/Documents/androidworkspace/RumenTest/test/src/main/jni -classpath /Users/lumeng/Library/Android/sdk/platforms/android-23/android.jar;~/Documents/androidworkspace/RumenTest/openCVLibrary310/build/intermediates/classes/debug: com.lumenghz.test.OpencvHelper

回答2:

Solved

I should declare the classpath of opencv-sdk-android which been builded.

So the commandLine should be like this:

javah -classpath ~/Documents/androidworkspace/RumenTest/openCVLibrary310/build/intermediates/classes/debug:. com.lumenghz.test.OpencvHelper

来源：https://stackoverflow.com/questions/39261963/error-class-org-opencv-core-mat-could-not-be-found