CSipSimple - Getting started to hack it (tailor to my needs)

Just one or two things I need to remember about CSipSimple:

Infrastructure

• SipStack runs in background (communication via Parcable interface). It interacts with PJSIP.
  Important there is a watchdog timer (about 5s)!
• pjsua.java, pjsuaConstants is the SWIG generated interface to PJSIP
• Native functions never return boolean, check for pjSuaConstants.PJ_SUCCESS
• Be aware of string exchange with the native stack: PjSipService.pjStrToString(...)
• UAStateReceiver.java does the call creation and everything related to SipStack
• PjSipService.java is deeply integrated with UAStateReceiver.java (for example does recording...)

UI

• CustomDistribution.java defines some things for fast modifying the behavior
• Main screen is created in SipHome.java (incl. the slidable tabs)
  To remove tabs, just disable tab.add (except for the warning tab and the message tab [message disable in CustomDistribution.java]: may be triggered from outside)
• Notifications are handled in SipNotifications.java (but from Sip-Thread)
• DialerFragment.java is the dialer incl. call button and account switcher...
  Here the re-dial functionality is missing... (press the call button twice without number should redial previous number)
  
• InCallActivity.java :)
  Important call setup is done BEFORE launching the InCallActivity via SipManager.ACTION_SIP_CALL_UI from UAStateReceiver.launchCallHandler(...).
  There is even a activity start delay of 2000ms (UAStateReceiver.LAUNCH_TRIGGER_DELAY).
  I think it's not nice!!!! Because a user may hear sound of before the UI is ready, but there is might be a problem with race conditions...
• InCallControls.java is the ui element on the bottom of InCallActivity to control Bluetooth and loudspeaker etc. (Deeply integrated with InCallActivity: sadly NO MVC...)
• InCall.java is also related to Dialer