I have two activities: Login and List.
When i log-in i display the list. When user is in the list activity and press the home button. After that clicks on the app icon it brings to login page for some times only. While it should display the list.
How to resolve this?
Your app is pushed out of memory sometimes in order to free memory for other apps. When it happens, app is re-launched when user enters it and first Activity is opened. The only(or not the only) way for you to maintain your app state is to store it somewhere. You could save whether user logged in or not in SharedPreferences and when Login Activity is created you could check this.