Change The Color Of Scrollview Programmatically

What I'm currently doing Currently, I have changed the scrollbar in my XML file using the android:scrollbarThumbVertical property like so:

However, I did come across this one stackoverflow answer that uses reflection to do it. Please upvote the answer there if it works for you: https://stackoverflow.com/a/19819843/3286163

The answer was for a listview but is the same for the scrollview:

ScrollViewscr= (ScrollView)findViewById(R.id.scrollView1);
try
{
    FieldmScrollCacheField= View.class.getDeclaredField("mScrollCache");
    mScrollCacheField.setAccessible(true);
    ObjectmScrollCache= mScrollCacheField.get(scr); // scr is your Scroll ViewFieldscrollBarField= mScrollCache.getClass().getDeclaredField("scrollBar");
    scrollBarField.setAccessible(true);
    ObjectscrollBar= scrollBarField.get(mScrollCache);

    Methodmethod= scrollBar.getClass().getDeclaredMethod("setVerticalThumbDrawable", Drawable.class);
    method.setAccessible(true);

    // Set your drawable here.
    method.invoke(scrollBar, getResources().getDrawable(R.drawable.scrollbar_blue));
}
catch(Exception e)
{
    e.printStackTrace();
}

Only thing I could find. I gave it a try myself and it worked.

Solution 2:

It is easy nowadays :)

scrollView.verticalScrollbarThumbDrawable = ColorDrawable(Color.CYAN)
scrollView.horizontalScrollbarThumbDrawable = ColorDrawable(Color.WHITE)

Solution 3:

In API 29+ use ScrollView.setVerticalScrollbarThumbDrawable() otherwise use the accepted answer.