Clip View for Game Play Scene

Clip View for Game Play Scene

This is a small basic tool for the game. I want small box that reside on one of the corner of the scene. In which I want to show preview of whole game scene.
I have read all the thing and try as much as possible to get the thing done. I use SingleSceneSplitScreenEngine for this purpose. Following is my code snippet.
public class TwoCameraView extends BaseGameActivity implements
            IOnSceneTouchListener {

    private static int CAMERA_WIDTH = 1024;
    private static int CAMERA_HEIGHT = 600;

    private Camera mCamera, mChasingCamera;
    private CameraScene mParentScene;

    private TextureRegion loadingRegion;

    @Override
    public Engine onLoadEngine() {
            mCamera = new Camera(0f, 0f, CAMERA_WIDTH, CAMERA_HEIGHT);
            mChasingCamera = new BoundCamera(0, 0, 100f, 100f, 0, CAMERA_WIDTH, 0,
                            CAMERA_HEIGHT);
            final EngineOptions engineOptions = new EngineOptions(true,
                            ScreenOrientation.LANDSCAPE, new RatioResolutionPolicy(
                                            CAMERA_WIDTH, CAMERA_HEIGHT), mCamera);
            engineOptions.getTouchOptions().setRunOnUpdateThread(true);
            return new SingleSceneSplitScreenEngine(engineOptions, mChasingCamera);
    }

    private TextureRegion loadTextureRegion(int width, int height, String name) {
            BitmapTextureAtlas BitmapTextureAtlas = new BitmapTextureAtlas(width,
                            height, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
            TextureRegion textureRegion = BitmapTextureAtlasTextureRegionFactory
                            .createFromAsset(BitmapTextureAtlas, this, name, 0, 0);
            getTextureManager().loadTextures(BitmapTextureAtlas);
            return textureRegion;
    }

    @Override
    public void onLoadResources() {
            loadingRegion = loadTextureRegion(1024, 1024, "loading.png");
    }

    @Override
    public Scene onLoadScene() {
            mParentScene = new CameraScene(mCamera);
            mParentScene.attachChild(new Sprite(0f, 0f, loadingRegion.deepCopy()));
            mParentScene.setOnSceneTouchListener(this);
            return mParentScene;
    }

    @Override
    public void onLoadComplete() {
    }

    @Override
    public boolean onSceneTouchEvent(Scene pScene, TouchEvent pSceneTouchEvent) {
            if (pSceneTouchEvent.isActionMove()) {
                    mChasingCamera.setCenter(pSceneTouchEvent.getX(),
                                    pSceneTouchEvent.getY());
                    return true;
            }
            return false;
    }

}
I have modify the SingleSceneSplitScreenEngine of AndEngine library as per the following.
public class SingleSceneSplitScreenEngine extends Engine {

    private final Camera mSecondCamera;

    public SingleSceneSplitScreenEngine(final EngineOptions pEngineOptions,
                    final Camera pSecondCamera) {
            super(pEngineOptions);
            this.mSecondCamera = pSecondCamera;
    }

    @Deprecated
    @Override
    public Camera getCamera() {
            return super.mCamera;
    }

    public Camera getFirstCamera() {
            return super.mCamera;
    }

    pu