以編程方式更改滾動條的顏色

Question

如何以編程方式更改滾動條的顏色？

ScrollView scrollView1 = new ScrollView(context);
scrollView1.LayoutParameters = lparams;
scrollView1.LayoutParameters.Height = chartHeight;
scrollView1.LayoutParameters.Width = scrollWidth;

我想創建TRANSPARENT滾動條。

Answer 1

您可以通過反射來實現：

try
{
    Field mScrollCacheField = View.class.getDeclaredField("mScrollCache");
    mScrollCacheField.setAccessible(true);
    Object mScrollCache = mScrollCacheField.get(listview);
    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);
    method.invoke(scrollBar, getResources().getDrawable(R.drawable.scrollbar_style));
}
catch(Exception e)
{
    e.printStackTrace();
}