an activity is a single, focused thing that the user can do. almost all activities interact with the user, so the activity class takes care of creating a window for you in which you can place your ui with setcontentview(view). while activities are often presented to the user as full-screen windows, they can also be used in other ways: as floating windows (via a theme with r.attr.windowisfloating set), multi-window mode or embedded into other windows. there are two methods almost all subclasses of activity will implement:
szzyb.site是李富升个人网站，该网站属于综合其他行业，网站后端技术使用nginx。网站已经通过工信部备案，备案号为： 粤ICP备20067376号。szzyb.site的域名年龄为4年3个月15天，注册商为Alibaba Cloud Computing Ltd. d/b/a HiChina (www.net.cn)，DNS为dns29.hichina.com,dns30.hichina.com，域名更新时间是2023年09月01日，域名过期时间是2024年07月23日，距离过期还有-106天。解析出来的IP有：61.132.228.101[中国安徽合肥 电信]。
