The Multi-Device Nightmare - and how to clear the Elm Street - DroidCon Berlin 2013

Transcript

1. www.immobilienscout24.de www.immobilienscout24.de The Multi-Device Nightmare - and how to clear the Elm Street Droidcon | Berlin | 09.03.2013 | Hasan Hosgel
2. About me Hasan Hosgel Twitter: @alosdev Github: alosdev Google+: Hasan Hosgel Slideshare: hosgel developer @ ImmobilienScout24 CO-Organizer @ GDG Android in Berlin & community events Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel
3. Fragmentation Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel
4. Fragmentation Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel > 2700 Android Devices
5. Here comes The Nightmare Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Image source: http://www.flickr.com/photos/boogeyman13/4553188509/
6. Here comes The Nightmare Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel For developers Image source: http://www.flickr.com/photos/boogeyman13/4553188509/
7. Device Classification Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Images sources: https://play.google.com/store/devices
8. Device Classification Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Images sources: https://play.google.com/store/devices http://www.htc.com/de/
9. Device Classification Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Images sources: http://www.sony.de/hub/google-tv
10. Device Classification Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Images Sources https://developer.ford.com/
11. Resource Folders Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel You can use several qualifiers in the resource folders name for serving the best matching resource. Most used qualifiers: •  Language (-en) •  Language & Region (-en-rUS) •  Smallest Width (-swXXXdp, e.g. –sw600dp) •  Screensize (-small, -normal, -large) •  Screen Orientation (-port, -land) •  Screen Pixel Densitiy (-mdpi, -hdpi, -xhdpi, -xxhdpi) •  Platform Version (-v11, -v13)
12. Resource Folders Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel If you have several resource folders, the one with the greatest matching number qualifiers will be used. e.g. : 1.  res/values/strings.xml 2.  res/values-en-rUS/strings.xml 3.  res/values-large/strings.xml 4.  res/values-sw600dp/strings.xml
13. Resource Folders Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel If you have several resource folders, the one with the greatest matching number qualifiers will be used. e.g. : 1.  res/values/strings.xml 2.  res/values-en-rUS/strings.xml 3.  res/values-large/strings.xml 4.  res/values-sw600dp/strings.xml If two resources have the same number of matching qualifiers, the ordering in the previous slide will rank the qualifiers. e.g. Device configurations: Nexus One: 1. Galaxy Tab 7.0 in German: 3. Nexus 7: 4.
14. Images Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel •  Use the different qualifiers for the screen pixel density (mdpi, hdpi, etc.) •  If you are forced to use text on images use language and region (en, es-rUs, en-rUS, etc.) •  Better approach is to use 9-patch drawables, which stretches automatically depending on the content inside. "   More about it: developer.android.com •  You must provide different launcher icons for Froyo, Honeycomb and above? Use the platform version. (v4, v11, v14)
15. Classifications For Layouts Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel If your minimum SDK is at least platform version 13 (Honeycomb MR2) project-folder/res/ layout/ è small phones layout-sw320dp/ è other phones layout-sw600dp/ è tablets 7” layout-sw720dp/ è tablets 10” You should also use orientation
16. Classifications For Layouts Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel If your minimum SDK is lower than platform version 11 (Honeycomb) project-folder/res/ layout/ è phones layout-v11/ è tablets 10” layout-v13/ è small phones layout-sw320dp/ è other phones layout-sw600dp/ è tablets 7” layout-sw720dp/ è tablets 10” The smallest width qualifier gets automatically platform version “v13” through the packager, for avoiding problems with the number of matching qualifiers. You can also use the screen size qualifier, if you want to reach small, medium and large screens previous to Honeycomb.
17. Classifications In Code Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel You can read the configurations from the device. Smarter Approach: use boolean resources project-folder/res/values/layouts.xml <resources> <bool name="is_phone_small”>false</bool> <bool name="is_phone_other">true</bool> <bool name="is_tablet_7”>false</bool> <bool name="is_tablet_10”>false</bool> </resources>
18. Classifications In Code Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel You can read the configurations from the device. Smarter Approach: use boolean resources project-folder/res/values/layouts.xml <resources> <bool name="is_phone_small”>false</bool> <bool name="is_phone_other">true</bool> <bool name="is_tablet_7”>false</bool> <bool name="is_tablet_10”>false</bool> </resources> Usage in code: Context.getResources().getBoolean(R.bool.is_phone_small)
19. Current Layout File Structure Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel project-folder/res/ layout/main.xml layout-v11/main.xml layout-v13/main.xml layout-sw320dp/main.xml layout-sw600dp/main.xml layout-sw720dp/main.xml
20. Current Layout File Structure Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel project-folder/res/ layout/main.xml layout-v11/main.xml layout-v13/main.xml layout-sw320dp/main.xml layout-sw600dp/main.xml layout-sw720dp/main.xml Fixing one bug in the 10“ layout has to be done in two files.
21. Current Layout File Structure Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel project-folder/res/ layout/main.xml layout-v11/main.xml layout-v13/main.xml layout-sw320dp/main.xml layout-sw600dp/main.xml layout-sw720dp/main.xml Fixing one bug in the 10“ layout has to be done in two files. è error prone
22. Resource Alias Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel 1.  Put your layout files in the default folder. project-folder/res/ layout/main.xml layout/main_phone_other.xml layout/main_tablet_7.xml layout/main_tablet_10.xml
23. Resource Alias Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel 1.  Put the needed layout files in the default folder. project-folder/res/ layout/main.xml layout/main_phone_other.xml layout/main_tablet_7.xml layout/main_tablet_10.xml 2.  Declare another resource file in the values folder and create an item with the needed classification. project-folder/res/values-sw600dp/layouts.xml <item name=“main” type=“layout”>@layout/main_tablet7</item>
24. Sample Screen Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel
25. Sample Screen Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Use <includes>
26. Sample Screen Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Use <includes> Create custom view
27. Custom View Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel public class CustomView extends LinearLayout { public CustomView(Context context, AttributeSet attrs) { super(context, attrs); LayoutParams lp = … addView(getText(context, "label"), lp); addView(getText(context, "value"), lp); if (context.getResources().getBoolean(R.bool.is_phone) || context.getResources().getBoolean(R.bool.is_phone_other)) { setOrientation(VERTICAL); } else { setOrientation(HORIZONTAL); } } private TextView getText(Context context, String text) { TextView textView = new TextView(context); textView.setText(text); return textView; } }
28. Sample Screen Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Use <includes> Create custom view
29. Sample Screen Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Use <includes> Create custom view If custom view has much more business logic and need lifecycles è Create a Fragment
30. Custom XML Attribute (attrs.xml) Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel <resources> <declare-styleable name=”CustomView"> <attr name="label" format="reference|string" /> <attr name="value" format="reference|string" /> <attr name="orientation" format="enum"> <enum name="horizontal" value="0" /> <enum name="vertical" value="1" /> </attr> </declare-styleable> <resources>
31. Custom XML Attribute (main.xml) Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Add to root XML node xmlns:app="http://schemas.android.com/apk/res/de.alosdev" Usage in custom view <de.alosdev.CustomView android:id="@+id/customView" android:layout_width="wrap_content" android:layout_height="wrap_content" app:label="label 1" app:orientation="vertical" app:value="value 1" />
32. Custom XML Attribute (CustomView.java) Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel public class CustomView extends LinearLayout { static final int[] ORIENTATION = new int[] { HORIZONTAL, VERTICAL }; public CustomView(Context context, AttributeSet attrs) { super(context, attrs); … TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CustomView); try { setOrientation(ORIENTATION[ a.getInt(R.styleable.CustomView_orientation, 0)]); } finally { a.recycle(); } } … }
33. Best Practices which learned painfully Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel •  You have already an application "   Remove orientation fixation and suppressing of orientation change from manifest to avoid long bug analyzing. •  You start from the scratch "   Focus on main classification for faster time to market "   But create an overall concept for better modularization •  If you support both orientations, save the instance state while orientation changes for more responsiveness "   Especially for states, need a long computation for creation. "   Make the state object Parcelable for faster write & read
34. Mission Accomplished Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel http://www.flickr.com/photos/ianaberle/5729561934/
35. Mission Accomplished Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel http://www.flickr.com/photos/ianaberle/5729561934/ cleared
36. Q & A Source: http://www.flickr.com/photos/21496790@N06/5065834411/ Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel Page 36 Droidcon 2013 | Mutli-Device Nightmare | Hasan Hosgel
37. www.immobilienscout24.de www.immobilienscout24.de Thanks for your attention! Contact: Hasan Hosgel Twitter: @alosdev Github: alosdev Multidevice Nightmare Repo: https://github.com/alosdev/multidevice-nightmare-demo SlideShare: http://de.slideshare.net/hosgel/droidcon-2013-multidevice-nightmare