[Unity] Android Back Button 처리하기

void Update()     {         if (Application.platform == RuntimePlatform.Android)         {             if (Input.GetKeyDown(KeyCode.Escape))             {                 // Back Button                 Application.Quit();             }             if (Input.GetKeyDown(KeyCode.Home))             {                 // Home Button             }             if (Input.GetKeyDown(KeyCode.Menu))             {                 // Menu Button             }         }     }