How to take screenshot of video view and text view which are on same layout

Question

i working on android application, i tried taking the screenshot of root layout where a text view, video view and relative layout as root view, i'm facing a problem that video is showing as black colored only text view is visible in the screenshot, my goal is to capture root layout along with text on the video clip. please help

<RelativeLayout
    android:id="@+id/root_layout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <VideoView
        android:id="@+id/video_player"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
         />

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SAMPLE"
        android:layout_centerInParent="true" />
</RelativeLayout>

My screenshot code:

Capturing the above root layout which id is 'root_layout'

 public static class Screenshot {
    public static Bitmap takescreenshot(View v) {
        v.setDrawingCacheEnabled( true );
        v.buildDrawingCache( true );
        Bitmap b = Bitmap.createBitmap( v.getDrawingCache() );
        v.setDrawingCacheEnabled( false );
        return b;
    }

    public static Bitmap takescreenshotOfRootView(View v) {
        return takescreenshot( v.getRootView() );
    }
}