双向进度条
1.通过setProgress设置右边方向进度.
2.通过setLeftProgress设置左边方向的进度.
setReachedLeftBarColor 设置左边进度条颜色.
setReachedLeft1BarColor 设置左边进度条渐变色.
如无渐变色,把其设置为与setReachedLeftBarColor一致即可.
setReachedLeftBarColor 设置右边进度条颜色.
setReachedLeft1BarColor 设置右边进度条渐变色.
如无渐变色,把其设置为与setReachedRightBarColor一致即可.