Exception: "java.lang.ClassNotFoundException: org.opencv.android.CameraGLSurfaceView$CameraTextureListener"

[AnhQuanTran]

Hello. When i open activity.xml file and preview it, error occured

Rendering Problems The following classes could not be instantiated:
- net.jonreynolds.androidopencvcamera.MyGLSurfaceView (Open Class, Show Exception, Clear Cache)
 Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the
 IDE.  
If this is an unexpected error you can also try to build the project, then manually refresh the layout.  
Exception Details
 java.lang.ClassNotFoundException: org.opencv.android.CameraGLSurfaceView$CameraTextureListener 
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I cleaned project and deleted cache but it is not working
How to fix it. Thanks

[J0Nreynolds]

Hi @AnhQuanTran. Have you found a solution to this problem, or do you still need help?

[AnhQuanTran]

Yes. I still need your help. Thanks in advanced