docs: public void setSelectorColor(int selectorColor) {
          this.mSelectorColor = selectorColor;
          this.mSelectorFilter = new PorterDuffColorFilter(Color.argb(mSelectorAlpha, Color.red(mSelectorColor), Color.green(mSelectorColor), Color.blue(mSelectorColor)), PorterDuff.Mode.SRC_ATOP);
          this.invalidate();
      }