Android Fragmentation

A brief talk given at MinneBar 2013 about the basics of battling fragmentation on Android.

Transcript

1. Android Fragmentation
   Daniel Lew
   4/6/2013
   Sunday, November 24, 13
   

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2. Problem
   • There too many phones!
   • Afraid to enter the Android arena?
   • There are solutions to most problems!
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3. Compatible Screens
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4. Source:  Kirill  Grouchnikov,  Google
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5. Screen Break Points
   • Determine when to switch from one layout to
   another
   • Can break on fragments or custom views.
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6. Play Store Break Points
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7. Play Store Break Points
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8. Play Store Break Points
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9. Play Store Break Points
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10. Fragments
    • Can be rearranged across different screen
    sizes
    • Can be reused
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11. Fragments - Rearranged
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12. Fragments - Rearranged
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13. Custom Views
    • Collection of standard Views, wrapped in a
    custom View
    • Customize for each configuration
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15. Sunday, November 24, 13
    

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16. Sunday, November 24, 13
    

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17. Compatible Code
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18. Reflection
    • Standard Java reflection
    • Only run code if the Class/Method exists
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19. Branched Code
    • Build.VERSION.SDK_INT
    if (Build.VERSION.SDK_INT >=9)
    // Run code only available on API 9+
    • Android 2.2+ does not cause VerifyErrors if
    unavailable classes/methods are never run.
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20. Proxy Classes
    • Create a class that encapsulates switched
    code
    • Class uses either reflection or branching
    • Access class without caring about which
    version of Android you are running
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21. Backwards-Compatible
    Libraries
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22. Android Support
    Library
    • Google provided library
    • Supports Fragments, LoaderManager,
    Notifications, Sharing
    • Includes classes not in vanilla Android
    (Pagers)
    • http://developer.android.com/tools/extras/
    support-library.html
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23. ActionBarSherlock
    • Action bars pre-3.0
    • Well supported
    • http://actionbarsherlock.com/
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24. NineOldAndroids
    • Backwards-compatible property animation
    library
    • All old animations aren't performant, but
    better than nothing.
    • http://nineoldandroids.com/
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25. HoloEverywhere
    • Consistent theming across devices
    • https://github.com/Prototik/
    HoloEverywhere
    • If you don't want a library, import from
    Android Open Source Project itself.
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26. Resource Qualifiers
    • All files under /res/
    are resources
    • Format: /res/-
    /
    • Qualifiers can be
    applied to any
    resource
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27. Useful Resource
    Qualifiers
    • Orientation
    • -landscape, -portrait
    • Screen size
    • -small, -medium, -large, -xlarge
    • -sw600dp, -sh900dp, etc.
    • Platform
    • -v11, -v14, etc.
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28. What to Qualify
    • Layouts
    • Dimensions (and integers)
    • Booleans
    • Styles and themes
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29. Links
    • Blog: http://daniel-codes.blogspot.com/
    • Email: dan@mobiata.com
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