HELP How to adapat screen size of a Relative Layout videoView

[Armczbt]

Hi, for an app that is a Video Player, I want to create a button that stretches the video to the edges of the screen. I have made a RelativeLayout :

<VideoView
        android:id="@+id/video_view"
        android:keepScreenOn="true"
        android:layout_width="fill_parent"

        android:layout_alignParentRight="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"
        android:layout_height="fill_parent"/>

and the code for the button :

case R.id.videoView_track:

            DisplayMetrics metrics1 = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(metrics1);
            android.widget.RelativeLayout.LayoutParams initialParams = (android.widget.RelativeLayout.LayoutParams) videoView.getLayoutParams();

            if (clickCount==1){
                initialParams.alignWithParent = true;
                videoView.setLayoutParams(initialParams);
                clickCount=0;
            }
            else if (clickCount==0){
                DisplayMetrics metrics = new DisplayMetrics();
                getWindowManager().getDefaultDisplay().getMetrics(metrics);
                android.widget.RelativeLayout.LayoutParams params = (android.widget.RelativeLayout.LayoutParams) videoView2.getLayoutParams();
                params.width = metrics.widthPixels;
                params.height = metrics.heightPixels;
                params.leftMargin = 0;
                params.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);

                videoView.setLayoutParams(params);
                clickCount=1;
            }
            break;
    }

The "else" part works, the video is first stretched and when i click the button it adapts to the screen size without stretching but I don't know how to do the contrary (the "if part"), how to kind of reset the params...

Thanks for your help