Using a Wifi Router without an Internet Connection

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http://stackoverflow.com – I'd like to setup my Linksys router to provide file sharing access / network connectivity (simply for testing purposes) but without an active internet connection. How can this be done? I've attempting setting it up in "Bridge Mode" (not sure if this is the best method) and the computer can now successfully connect without issues - but every time I attempt to connect with any Android device the device states "Authenticating" then disconnects and reconnects a few times: but eventually never connects. What is the best method for configuring my router to be used without having an active interne (HowTos)