title: Android SIP with CSipSimple and pjsip
body: <p>I am writing a custom Android application that allows the user to make VOIP calls using SIP. When the user presses a button, a voice call is initiated with another SIP user. That's it. The only other requirements are that it has to work on 2.3+ Android devices and must not be limited to wifi only.</p>
  
  <p>Android already includes a SIP stack (as of 2.3) and I was able to modify the Walkie-Talkie sample project to work exactly how I wanted it to. Unfortunately I was not able to use this app with certain devices (Casio Commando being one of them), and worse, the application only works over wifi (as I mentioned, unacceptable for my project).</p>
  
  <p>I started searching for another SIP stack with an easy to use API and came across CSimpleSip. I compiled it and ran their demo project (SipHome) and it worked perfectly on my unsupported phones (including the Commando) and it also worked over wifi, satisfying my requirements. I was so excited... until I looked at the source code for CSipSimple. I have no idea how to begin extracting out the actual calls to the underlying pjsip API, nor was I able to get the pjsip demo application working after 10+ hours.</p>
  
  <p>Has anyone deconstructed CSipSimple and separated out the SIP parts from their incredibly complicated UI, or does anyone know of a simpler to use SIP library? With the native SIP API I was able to make a 200 line Android activity that made the call perfectly... how can I accomplish this with a third party SIP stack that supports non-wifi?</p>
  
  <p>Thanks for any input, I know quite a few people have gotten stuck at this same stage.</p>