How to set scrollbar thumb programmatically in Android?

Question

I know listview can set scrollbar thumb in XML like this Android:scrollbarThumbVertical etc.

But I\'m creating a listview instance in the java code and

Answer 1

I modified the answer to make it a method 100% programmatically

   public static void ChangeColorScrollBar(View Scroll, int Color, Context cxt){

   try
   {
       Field mScrollCacheField = View.class.getDeclaredField("mScrollCache");
       mScrollCacheField.setAccessible(true);
       Object mScrollCache = mScrollCacheField.get(Scroll);
       Field scrollBarField = mScrollCache.getClass().getDeclaredField("scrollBar");
       scrollBarField.setAccessible(true);
       Object scrollBar = scrollBarField.get(mScrollCache);
       Method method = scrollBar.getClass().getDeclaredMethod("setVerticalThumbDrawable", Drawable.class);
       method.setAccessible(true);

       Drawable[] layers = new Drawable[1];
       ShapeDrawable sd1 = new ShapeDrawable(new RectShape());
       sd1.getPaint().setColor(cxt.getResources().getColor(Color));
       sd1.setIntrinsicWidth(Math.round(cxt.getResources().getDimension(R.dimen.dp_3)));
       layers[0] = sd1;

       method.invoke(scrollBar, layers);
   }
   catch(Exception e)
   {
       e.printStackTrace();
   }

}