Pattern-Oriented Software Architectures: Programming Mobile Services for Android Handheld Systems (9th Virtual office hours)

==== Abstraction ====
This is the final Virtual Office Hours on this MOOC.
Besides explanation of the last assignment, next Mobile Cloud MOOC is explained.

==== W8A7 ====
The lines like "mDownloadCall = null;" are not replaced, but just commented out.
print.StackTrace() is used.
synchronize is not used.
To use another thread is an alternative solution.
classname.this is used as contexts.