a target must be selected in order to create an AVD怎么办?

搭建Android环境时提示A target must be slected in order to create an 在安装安卓SDK模拟器中,出现错误提示：A target must be selected in order to cr you must create or sign in to a gmai account in order to use In order to target efforts. (1/3)Dart and target each separation are in order to be able 求解释关于英语语法!In order to get this job ,a form must be filled in 英语翻译In order to be considered what must be provided? You must create an account to Do you think a person must have in order to be a successful 托福作文求思路In order to be well-informed,a person must get inform In order to be well-informed,a person must get information f USB Debugging must be enabled in order for VISIONary to