public void setColorStateList(ColorStateList tintStateList) {
        super.setColorStateList(tintStateList);
        mEndColor = tintStateList.getDefaultColor();
        mStartColor = tintStateList.getColorForState(new int[]{android.R.attr.state_pressed}, mEndColor);
    }
The two colors that will be used for the seek thumb.

@param startColor Color used for the seek thumb
@param endColor   Color used for popup indicator
caprice/ui/src/main/java/net/qiujuer/genius/ui/drawable/BalloonMarkerDrawable.java