@Override
    protected void onBoundsChange(Rect bounds) {
        super.onBoundsChange(bounds);
        computePath(bounds);
    }
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
app/src/main/java/com/duan/musicoco/view/discreteseekbar/internal/drawable/MarkerDrawable.java