===============[ Skills & achievements in Lab 2 ]===============

NOTE: In this lab, you may lose points for crashes or regressions.
      See "Lost Points" below.

- Implementing a Tabbed UI
  - Constructing a UI out of several Fragments
  - Changing visible Fragments in response to events
  - Use of Tab Layout, ActionBar menu, or equivalent
  - Implementing sliding screens with a ViewPager (or equivalent)
  - Use of PreferenceFragment to display user profile information


- UX design
  - Implementing a reasonable flow of sign-up, profile data
     generation, uploading (saving) the data to the server as well as
     saving it locally, local deletion of data on sign-out, and,
     optionally, retrieval of data from the server on sign-in after a
     sign-out. 
  - Extra credit: updating the data in the Preferences tab
                   and uploading the update to the server
                   (we'll require this in the next lab)

- Android threading model
  - Executing tasks off the UI thread (by any mechanism)
  - Communicating with the UI thread from a worker thread
  - Using post(), Handler, AsyncTask, or equivalent API

- Networking
  - Sending a GET request with parameters, receiving and displaying server's response
  - Sending a POST request with a non-empty body
  - Controlling headers of an HTTP request
  - Handling a JSON response
  - Parsing JSON with a library (no ad-hoc parsing except to debug!)
  - Handling network error conditions gracefully (e.g., your app should not
      crash when attempting to connect a non-existent host or address)
  - Consistent handling of network state (has a connection been made?
     has the data been uploaded? has the upload been ack-ed by the
     server? etc.)

Each one of these 16 items earns 2 points if done correctly, 1 point
if buggy but generally working, 0 if not attempted or never functional.

Additional 8 points are assigned for style (2 each, as above):
  - use of git for source control
  - meaningful commenting
  - consistent indentation
  - consistent use of Java facilities (constants, private, annotations, etc.)

Overall: 16*2 + 8 = 40 points 

Lost points for regressions and crashing: Up to 3 points can be
     subtracted if an app crashes or some of the functionality
     implemented in Lab 1 stops working (a regression). Specifically,
     1 point will be subtracted if a crash occurs under some unusual
     circumstances, 2 if it occurs sporadically, and 3 if it occurs
     reproducibly on every launch.

Extra credit: 2 extra points for profile update functionality working, 1 point for semi-working.
      	      2 extra points for meaningful reporting of upload progress (say, of
	          profiles that include thumbnail images).
	      PLEASE do NOT upload full-size images yet!	   

Total: 40 + 4 = 44 maximum, BUT, TAs will assign up to 4 extra points for innovative 
                                 solutions, research (e.g., of bugs), or design.