Unity 4.5 subview on Android with OpenCV

I am trying to implement a Unity subview that draws objects over some camera frames captured by OpenCV. I am following this link and this steps, creating a FrameLayout, and attaching the GLSurfaceView object. However, since 4.3, the UnityPlayer class does not allow this, and therefore I am not able to display the Unity subview over my camera frames (I'm using OpenCV's JavaCameraView to display them on the layout). Has anybody find this problem with Unity 4.5? I'd really appreciate your help with this. Here is a bit of the code:

 glView = new GLSurfaceView(this);
 glView.setEGLContextClientVersion(2);
 glView.setEGLConfigChooser(8, 8, 8, 8, 16, 0);
 glView.getHolder().setFormat(PixelFormat.TRANSLUCENT);
 glView.setRenderer(mUnityPlayer); //This is not allowed anymore. It gives a compilation error

I have seen people extending the UnityPlayer class. However, I face some difficulties with that too.