CardView shadow rendering issue

gistfile1.txt

/**
 * Created by wingoku on 2/4/15.
 */
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Color;
import android.os.Build;
import android.support.v7.widget.CardView;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.Toast;


/**
 WEBVIEW - wingoku
 */
public class MyBrowser extends RelativeLayout {

    private Context context;
    private MyWebView webView;
    ImageView crossImage;
    float pivotX, pivotY;

    LayoutParams imageViewParams;
    DisplayMetrics metrics;

    float[] webViewCoordsBackup, webViewCoordForProcessing;
    boolean openingAtSpecifiedCoords = false;
    boolean slideInAnimation = false;
    int animationDuration;

    CardView mCardView;
    LayoutParams mCardViewParams;



    public MyBrowser(Context context) {
        super(context);

        this.context = context;
        init();
    }

    public MyBrowser(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.context = context;
        init();
    }

    public MyBrowser(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        this.context = context;
        init();
    }


    private void init() {

        setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        setBackgroundColor(Color.WHITE);
        setPadding(0,0,0,0);


        metrics = context.getResources().getDisplayMetrics();

        webView = new MyWebView(context, 1994);
        webView.setMyWebViewEventListener(this);


        mCardView = new CardView(context);
        mCardView.setId(1995);
        //mCardView.setCardBackgroundColor(Color.BLUE);
        //mCardView.setPreventCornerOverlap(true);
        mCardView.setCardElevation(dpToPixels(10));
        mCardView.setMaxCardElevation(dpToPixels(10));
        mCardView.setUseCompatPadding(true);
        mCardView.addView(webView.getWebviewInstance());
        //mCardView.setRadius(1f);
        mCardViewParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        mCardViewParams.topMargin = dpToPixels(28);
        mCardViewParams.leftMargin = dpToPixels(28);
        mCardViewParams.rightMargin = dpToPixels(28);
        mCardViewParams.bottomMargin = dpToPixels(28);
        mCardView.setLayoutParams(mCardViewParams);
	//addView(mCardView,mCardViewParams); // adding CardView to MyBrowser & then adding MyBrowser to xml inflated RelativeLayout doesn't render shadows. Adding cardView directly to xml inflated RelativeLayout render shadows

    }


    public void loadBrowser(String url, float pivotX, float pivotY) {

        this.setLayerType(LAYER_TYPE_SOFTWARE, null);

        this.pivotX = pivotX;
        this.pivotY = pivotY;

        webView.getWebviewInstance().loadUrl(url);

        Animation anim;
        if(slideInAnimation)
        {
            animationDuration = 500;
            if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
                mCardViewParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

                mCardViewParams.rightMargin = -1;
                anim = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 1, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0);
            }
            else {
                mCardViewParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                mCardViewParams.bottomMargin = -1;
                anim = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 1, Animation.RELATIVE_TO_SELF, 0);
            }
        }
      

    }

    @Override
    protected void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);

        if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            Toast.makeText(context, "Land", Toast.LENGTH_SHORT).show();

            mCardViewParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

        }
        else {
            Toast.makeText(context, "PORT", Toast.LENGTH_SHORT).show();
            mCardViewParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

        }
    }




    private int dpToPixels(int dp)
    {
        return (int)getResources().getDisplayMetrics().density * dp;
    }

    public CardView getCard(){
        return mCardView;
    }
}