Getting double opengl object when try to draw an opengl object infront of camera

Hi,
I am pritom. I am new in android development. I am trying to drwa an object in top of the camera view....
Here is my code

Code (Text):

1.  
2. [URL="file:///C:/workspace/Back%20UP/com.onlycam/"][/URL][URL="file:///C:/workspace/Back%20UP/com.onlycam/"][/URL]   mPreview = new Preview(this);    
3.         mGLSurfaceView = new TouchSurfaceView(this);
4.         mGLSurfaceView.getHolder().setFormat(PixelFormat.TRANSLUCENT);
5.         mGLSurfaceView.setKeepScreenOn(true);      
6.           setContentView( mGLSurfaceView);        
7.           addContentView( mPreview, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
8.        
9.  

I am getting 2 object and the position of the object not perfect....
Anybody have any idea..
Thanks In advance

Pritom Kushtia.