WindowManager.LayoutParams 常量 2003 为 TYPE_SYSTEM_ALERT ，已在API级别26中弃用.可以根据API 25(可能是该物理设备)构建，也可以使用 TYPE_APPLICATION_OVERLAY代替.仅使用 build.gradle 中的一行，就很难理解代码甚至针对哪个API运行.

WindowManager.LayoutParams constant 2003 is TYPE_SYSTEM_ALERT, deprecated in API level 26. either build against API 25 (which may be that physical device) or use TYPE_APPLICATION_OVERLAY instead. with a single line from the build.gradle it's difficult to understand against which API the code even runs.

提示:请确保在安装了Play服务的仿真器映像上运行此程序.

hint: make sure you run this on an emulator image with Play Services installed.