Logging into an email service without showing the process

I'm trying to create a simple app that would have a name (like a gmail account name) and when clicked on, would behind the scenes input the email and password then log in and just show me being logged in (showing my emails). I would love to learn how to do this so if anyone happens to stumble on this and knows how, could you explain the general idea how so I can still do it myself?



this is a little bit more advanced...

I can offer a solution for gmail here 

App Inventor -  Gmail Interface

but as Enis said, first do the tutorials http://appinventor.mit.edu/explore/ai2/tutorials.html to learn the basics of App Inventor, then try something and follow the

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