Calculates and returns frames per second

根据view获得期望的高度 @param view @return

根据view获得期望的宽度 @param view @return

@param position @return

create the order info. 创建订单信息

get the out_trade_no for an order. 生成商户订单号，该值在商户端应保持唯一（可自定义格式规范）

@return the result

@return the resultStatus

get the sign type we use. 获取签名方式

Converts hex values from strings to byte arra @param hexString string of hex-encoded values @return decoded byte array

If the position offset of a fragment is less than negative one or greater than one, returning true will set the fragment alpha to 0f. Otherwise fragme

初始化一些基本参数 url , tag , headers

初始化数据

初始化fragments

有子类实现，实现特有效果 @return

Indicates if the default animations of the view pager should be used. @return

更新数据

UI Thread @param request