問(wèn)題：

因?yàn)槭褂昧藛袅▎袅ǖ闹黝}框架，所以需要?jiǎng)討B(tài)修改RecyclerView的scrollbar顏色粥脚，但是scrollbar是view的私有內(nèi)部類脊岳，只能在xml中配置。如下圖

image

解決方法：

查看源碼顿乒，通過(guò)反射獲取scrollbar的drawable议街，然后用框架著色

public static void tintScrollbarColor(Context context, RecyclerView recyclerView) {
        try {
            //通過(guò)反射一層層的獲取對(duì)象，直到獲取到進(jìn)度條
            Class<View> clazz = View.class;
            Method method = clazz.getDeclaredMethod("getScrollCache");
            method.setAccessible(true);
            Object scrollabilityCacheObj = method.invoke(recyclerView);
            Class<?> scrollabilityCacheClazz = scrollabilityCacheObj.getClass();
            Field scrollBarField = scrollabilityCacheClazz.getField("scrollBar");

            Object scrollbarObj = scrollBarField.get(scrollabilityCacheObj);
            Class<?> scrollbarClass = scrollbarObj.getClass();

            Field mVerticalThumbField = scrollbarClass.getDeclaredField("mVerticalThumb");
            Field mHorizontalThumbField = scrollbarClass.getDeclaredField("mHorizontalThumb");
            mVerticalThumbField.setAccessible(true);
            mHorizontalThumbField.setAccessible(true);
            Drawable mVerticalThumb = (Drawable) mVerticalThumbField.get(scrollbarObj);
            Drawable mHorizontalThumb = (Drawable) mHorizontalThumbField.get(scrollbarObj);
            //對(duì)顯示的drawable著色
            Drawable mVerticalThumbTint = ThemeUtils.tintDrawable(mVerticalThumb, 
                              ThemeUtils.getColorById(context, R.color.theme_color_primary));
            Drawable mHorizontalThumbTint = ThemeUtils.tintDrawable(mHorizontalThumb, 
                              ThemeUtils.getColorById(context, R.color.theme_color_primary));
            //設(shè)置新的drawable
            mVerticalThumbField.set(scrollbarObj, mVerticalThumbTint);
            mHorizontalThumbField.set(scrollbarObj, mHorizontalThumbTint);
        } catch (Exception e) {
            e.printStackTrace();
        }
}