android studio 关闭自动保存功能（实测）

• Disable Auto Save 禁用自动保存

File > Settings > Appearance & Behavior > System Settings > Synchronization > then uncheck both Save files on frame deactivation and Save files automatically if application is idle > OK

• Mark Changed But Unsaved File 标记已更改但未保存的文件

（这一步一定要做，不然无法用是否带*号判断是否保存）

File > Settings > Editor > General > Editor Tabs > then check Mark modified tabs with asterisk > OK

• Save One File with Ctrl+S 使用Ctrl + S保存文件（这一步不一定需要）

File > Settings > Keymap > search with save document > right click Save Document > Add Keyboard Shortcut > press Ctrl+S > OK > Remove > OK

参考：https://stackoverflow.com/questions/28946013/how-to-disable-auto-save-save-in-android-studio