Since the announcement of Android Developer Challenge 2 in May, Android phones continue to be deployed in countries worldwide. Android phones are currently available in over 20 countries, with more on the way. As I’ve mentioned earlier, we’ll be including real-world users of these phones to help review and score your submissions. It is important to remember that your apps will be reviewed by judges around the world on actual devices; thus, be sure to make it extremely easy for users/judges to access your apps with minimum setup.

Some of you have been asking for clarifications on what we mean by “open only to applications that have not been published”. To be specific, applications that are available on Android Market before August 1, 2009 will not be eligible to participate in the contest. Users have already been providing comments for apps that are currently available on Android Market, so it wouldn’t make sense for them to “judge” the same apps again in this contest. In addition, apps that include or that are based on open source projects are fully welcomed, as long as the application itself is not on Android Market until August 1, 2009.

If you want to find out more details about ADC 2, you can find everything at the ADC 2 page along with the Terms and Conditions. For the moment, the most important thing to know is that ADC 2 submissions will be due August 31. I can’t wait to see what you all come up with this time.

Happy coding — and good luck!

Android 1.5 Platform Highlights

April 2009 by android.com

The Android 1.5 platform introduces many new features for users and developers. The list below provides an overview of the changes.

User Interface Refinements

  • System-wide:
    • Refinement of all core UI elements
    • Animated window transitions (off by default)
    • Accelerometer-based application rotations
  • UI polish for:
    • In-call experience
    • Contacts, Call log, and Favorites
    • SMS & MMS
    • Browser
    • Gmail
    • Calendar
    • Email
    • Camera & Gallery
    • Application management

Performance Improvements

  • Faster Camera start-up and image capture
  • Much faster acquisition of GPS location (powered by SUPL AGPS)
  • Smoother page scrolling in Browser
  • Speedier GMail conversation list scrolling

New Features

  • On-screen soft keyboard
    • Works in both portrait and landscape orientation
    • Support for user installation of 3rd party keyboards
    • User dictionary for custom words
  • Home screen
    • Widgets
      • Bundled home screen widgets include: analog clock, calendar, music player, picture frame, and search
    • Live folders
  • Camera & Gallery
    • Video recording
    • Video playback (MPEG-4 & 3GP formats)
  • Bluetooth 
    • Stereo Bluetooth support (A2DP and AVCRP profiles)
    • Auto-pairing
    • Improved handsfree experience
  • Browser
    • Updated with latest Webkit browser & Squirrelfish Javascript engines
    • Copy ‘n paste in browser
    • Search within a page
    • User-selectable text-encoding
    • UI changes include:
      • Unified Go and Search box
      • Tabbed bookmarks/history/most-visited screen
  • Contacts
    • Shows user picture for Favorites
    • Specific date/time stamp for events in call log
    • One-touch access to a contact card from call log event
  • System
    • New Linux kernel (version 2.6.27)
    • SD card filesystem auto-checking and repair
    • SIM Application Toolkit 1.0
  • Google applications (not available in the Android 1.5 System Image that is included in the Android SDK)
    • View Google Talk friends’ status in Contacts, SMS, MMS, GMail, and Email applications
    • Batch actions such as archive, delete, and label on Gmail messages
    • Upload videos to Youtube
    • Upload photos on Picasa

New APIs and Manifest Elements

  • UI framework
    • Framework for easier background/UI thread interaction
    • New SlidingDrawer widget
    • New HorizontalScrollview widget
  • AppWidget framework
    • APIs for creating secure home screen AppWidgets. For information about how to use AppWidgets, see the Developer’s Guide AppWidgets documentation. Also see Introducing home screen widgets and the AppWidget framework on the Android Developer’s Blog.
    • APIs for populating Live Folders with custom content.
  • Media framework
    • Raw audio recording and playback APIs
    • Interactive MIDI playback engine
    • Video Recording APIs for developers (3GP format).
    • Video and photo sharing Intents
    • Media search Intent
  • Input Method framework
    • Input Method Service framework
    • Text-prediction engine
    • Ability to provide downloadable IMEs to users
  • Application-defined hardware requirementsApplications can now use a new element in their manifest files, <uses- configuration> to indicate to the Android system what hardware features they require in order to function properly. For example, an application might use the element to specify that it requires a physical keyboard or a particular navigation device, such as a trackball. Prior to installing the application, the Android system checks the attributes defined for the <uses-configuration> element and allows the installation to continue only if the required hardware is present.
  • Speech recognition framework
    • Support for using speech recognition libraries via Intent. See RecognizerIntent.
  • Miscellaneous API additions
    • LocationManager – Applications can get location change updates via Intent
    • WebView – Touch start/end/move/cancel DOM event support
    • Redesigned Sensor Manager APIs
    • GLSurfaceView – convenience framework for creating OpenGL applications
    • Broadcast Intent for app update install succeeded – for smoother app upgrade experience