public void setThumbBounds(int x, int y, int w, int h) {
super.setThumbBounds(x, y, w, h);
}
// 设置滑块bounds
@Override
protected void setThumbBounds(int x, int y, int width, int height) {
super.setThumbBounds(x + width / 4, y, width / 2, height);
}