How to Skip LauncherActivity and call another Activity when application start

I have Splash Activity => Login Activity => Main Activity.... Once user Login My user Should redirect To the Main Activity Directly till LOGOUT..... Give me a specific solution please...What to do in which Activity..

I am working with web services.... suggest me if SQ Lite require or Shared-preference Or Session.Class..... Please BE SPECIFIC ...what to do in which Activity/Class...

Before Login.. Splash Activity => Login Activity => Main Activity I want flow after LOGIN like this.. Splash Activity =>Main Activity .... Thank You in advance.....