When I click my app's icon on the desktop,the splashactivity will first run, then it start the loginactivity before it finished. I click the loginbutton to login.the I came to the mainactivity.Then I click the HomeKey to goto the Android Home. At this time ,I click the app's icon again, the splashactivity start firstly. Why the mainactivity can't be recover? Othewirse,when I click the HomeKey at loginactivity ,the app can skip the splashactivity and recover the loginactivity.Thanks.