android Session 'app': Error Launching activity

android studio 真機調試項目的時候報錯：

Error while executing: am start -n "Error while executing: am start -n "com.example.nanjinyaolao/com.example.nanjinyaolao.SplashActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=pagekageName/.ac.WelcomeActivity }
Error type 3
Error: Activity class {com.example.nanjinyaolao/com.example.nanjinyaolao.SplashActivity} does not exist.

Error while Launching activity

解決辦法：在控制檯手動卸載app：adb uninstall 應用包名