This was my fifth android example application from the BigNerdRanch Android Development Guide, chapters 25-30. This sample application went over:
-Networking Basics
-AsyncTask, Background Threads
-Using Public APIs (Flickr)
-Parsing JSON, using GSON
-Messages and Message Handlers
-Search Functions
-Background Services (IntentService)
-Notifications
-Broadcast Intents
-Receiving System Broadcast
-WebView