Error when combining UnityPlayerActivity with opencv

Hi all,

I am planning to combine unity java plugin with opencv on android, to use the android native camera instead of using Unity webcamtexture. When I tried to implement CvCameraViewListener2 based on UnityPlayerActivity (the code is like: public class MainActivity extends UnityPlayerActivity implements CvCameraViewListener2), the error:
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.kw.testopencv/com.kw.testopencv.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.kw.testopencv.MainActivity" on path: DexPathList[[zip file "/data/app/com.kw.testopencv-2/base.apk"],nativeLibraryDirectories=[/data/app/com.kw.testopencv-2/lib/arm, /vendor/lib, /system/lib]]

always occurs, and the app crashes when started.

However if I only use UnityPlayerActivity to extend MainActivity, without implementing CvCameraViewListener2, it works well.

I exported the .jar file in Eclipse IDE and put it into the 'Assets\Plugins\Android' folder, together with the AndroidManifest.xml and 'res' folder following the official guide.

I attached the MainActivity.java and AndroidManifest.xml.

Could anyone tell me where is the problem please?
Thank you!

 

did you solve this problem?
can you share it?

I'm getting the same error message and I'm out of ideas

 

Sorry but i failed to make it work. Instead I used the Android Camera class inside the inherited UnityPlayerActivity class to get the camera byte[] data and convert it to opencv mat myself.