What is the best "pattern" to use for Android settings flow?

I have an application which has a few settings, with dependencies.

So you need to enter a username, password. These may or not be invalid - they are on a remote server. There are other values for possible settings that can be retrieved. I'm having a problem sorting everything out with PostChanged handlers and network threads needing to be async - it makes it hard to have a robust way to handle settings.

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  Need username/password.

  
  


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  Needs to be valid (check server - network call)

  
  


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  If valid, need to populate a ListPreference with some possible values (network call, AND update ListPreference)

  
  

Right now things are very hack-ish, thrown together, AsyncTasks everywhere.

There's got to be a better way?