問題：
Yesterday my app was running perfect from Android Studio but today when I started working on my app and running it i am getting error message continuously昨天我的應用程序在Android Studio運行良好，但今天當我開始處理我的應用程序並運行它時，我不斷收到錯誤消息
Installation failed with message Failed to establish session.安裝失敗並顯示消息未能建立會話。
Screen :屏幕 ：
On click OK getting error message單擊確定時收到錯誤消息
Session 'app':Error Installing APKs會話“應用程序”：安裝 APK 時出錯
And App is not exist(already Uninstalled) in device.並且設備中不存在應用程序（已卸載）。 Please suggest me what to do ?請建議我該怎麼做？
解決方案：
參考一： https://en.stackoom.com/question/2t6zn參考二： https://stackoom.com/question/2t6zn