获得所有分类

文章是否已经点过赞 @param articleId 文章id @param username 点赞人 @return true--已经点过赞 false--没有点赞

字符串转换成字符串数组 @param str 字符串 @return 转换后的字符串数组

* clean the save value of an attribute * removing __ from the beginning of the value

* hide a single fragment inside the specified section / page * the fragment index parameter is optional, if passed force the specified fragment to

* show a single fragment inside the specified section / page * the fragment index parameter is optional, if passed force the specified fragment to