Supporting multi screen in android cn
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Supporting multi screen in android cn

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Supporting multi-screen in android cn

Supporting multi-screen in android cn

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Supporting multi screen in android cn Supporting multi screen in android cn Presentation Transcript

  • Supporting Multiple Screens in Android Android多屏幕适配
  • Preface Author:  Ren Fei. Android developer  Buding Mobile / Innovation Works Announcement:  本slide内容全部来自互联网,以及我自己的一点臆想,如 有错误,欢迎随便指出。
  • Origin of the problem 问题的由来
  • Fragmentation 上千种android设备。  不同的平台版本。  不同的屏幕尺寸、分辨率。  不同的输入方式。
  • Platform version From v1.5 to v4.1. 8 main version. 14 sub version.
  • Screen sizes 2.6" HTC G16 3.2" 3.7" HTC G5/G7 4.0" 4.3" Samsung i9000/9100 7.0" 7.7" 8.9" Samsung Galaxy Tab 10.1" Moto Xoom …..
  • Screen Resolution iPhone iPhone  320*480  640*960 iPad  1024*768  2048*1536
  • Screen Resolution Android QVGA 240*320 WQVGA 240*400 HVGA 320*480 WVGA 480*800 FWVGA 480*854 SVGA 600*800 DVGA 960*640 WSVGA 1024*600 WXGA 1280*768 qHD 540*960 HD 1280*720 ……
  • Screen RES. iPhone vs. Android
  • Android System Support Android系统支持
  • What does android do ?
  • Some definition Screen resolution  480*800 Screen size  3.7" Screen density  252dpi DPI(dots per inch), xdpi, ydpi  DPI= RES. / SIZE DIP (Density-independent pixel)  px = dp * (dpi / 160)
  • Generalized SIZE/DPI G.DPI: hdpi/mdpi/ldpi/xhdpi G.SIZE: small/normal/large/xlarge
  • Generalized DPI definition G.DPI DPI 1 DP = ? px ldpi (Low density) 120 dpi 0.75 mdpi (Medium density) 160 dpi 1 hdpi (High density) 240 dpi 1.5xhdpi(Extra-high density) 320 dpi 2
  • Generalized SIZE definition G.SIZE Qualifier(at least) xlarge 960dp x 720dp large 640dp x 480dp normal 470dp x 320dp small 426dp x 320dp Android does not currently support screens smaller than small screens.
  • Relationships RES. + SIZE  DPI  DPI = RES. / SIZE DPI  G.DPI  ? SIZE  G.SIZE  ?
  • Some model device SIZE G.SIZE DPI G.DPI RES. px RES. dp HTC wildfire 2.8 in small 140dpi ldpi 240*320 320*428dp HTC hero 3.2 in normal 180dpi mdpi 320*480 320*480dp HTC desire 3.7 in normal 252dpi hdpi 480*800 320*533dp Dell Streak 5.0 in large 186dp mdpi 480*800 480*800dpHTC sensation 4.3 in normal 256dpi hdpi 540*960 360*640dp Galaxy note 5.3 in normal 280dpi xhdpi 800*1280 400*640dp HTC Flyer 7.0 in large 170dpi mdpi 600*1024 600*1024dp Galaxy tab 7.0 in normal 170dpi hdpi 600*1024 400*682dp Xoom 10.1 in xlarge 150dpi mdpi 800*1280 800*1280dp
  • DPI  G.DPI G.DPI 大部分等于真实DPI最临近的G.DPI。  如果DPI正好在两个G.DPI正中间怎么办? G.DPI可能和DPI相差很多。  Samsung galaxy tab G.DPI是由手机厂商定义的。  选择标准是使新的设备能最好的适用于现有app。
  • SIZE  G.SIZE SIZE 和 G.SIZE 并没有很明显的关系。 G.SIZE是由RES.(dp) 定义的。  参考G.SIZE的下界限定。 RES.(px) + G.DPI  RES.(dp)  G.SIZE
  • Relationships RES. + SIZE  DPI DPI  G.DPI (mostly) G.DPI + RES.  G.SIZE
  • Effect of G.DPI Developers do not need to care about real density. RES.(px). are aggregated to RES.(dp).  RES.(dp) has a much smaller range. device G.SIZE G.DPI RES. px RES. dp HTC wildfire small ldpi 240*320 320*428dp HTC hero normal mdpi 320*480 320*480dp HTC desire normal hdpi 480*800 320*533dp HTC sensation normal hdpi 540*960 360*640dp Galaxy note normal xhdpi 800*1280 400*640dp Galaxy tab normal hdpi 600*1024 400*682dp
  • Density independence 根据G.DPI,系统将dp units和drawables换算调整为 适配设备的大小(px). A Button (100*100dp) and a icon (48px*48px in mdpi) Go back to see first demo.
  • Support general handset 如何支持普通手机?
  • Handset features Small and Normal devices take over 90%. These devices are nearly all handsets.
  • Handset qualifier G.SIZE: small/normal Default Orientation: portrait RES.(dp): 426dp x 320dp - 640dp x 480dp.
  • How to support? Develop a scalable app.  Use wrap_content, fill_parent.  Use dp not px.  Use LinearLayout/RelativeLayout, not AbsoluteLayout.  Provide different drawables for different dpi.  Use more 9-patch drawable.  …
  • A simple demo 720*1280px 540*960px xhdpi 480*800px hdpi320*480px hdpimdpi
  • Support more devices (handset & tablet) 如何支持更多的设备?
  • The first guideline Develop one app for all devices.  Tablets和Handsets没有明显的界限。  为不同的设备、分辨率开发不同的app耗费巨大且效果不佳。 Anti-example:
  • Official Guidelines Build your activity designs based on fragments Use the action bar Implement flexible layouts
  • Implement flexible layouts How to implement flexible layouts in one app?  Official answer: Think like a web designer.
  • Responsive web design Build something that works on any possible width or device instead of something that works on all current widths and devices.  与其为当前所有设备、大小做支持,不如去支持所有可能 出现的情况。 Use css3 media queries. Usually combine with fluid web design.
  • Media queries Sample:  <link media="screen and (max-device-width: 800px)" href=“common.css" /> Media queries contain two components:  A media type. (screen, print)  A media feature(max-device-width) and query value(800px). Use media queries to filter css depend on device info.
  • Website demo http://www.alistapart.com/d/responsive-web- design/ex/ex-site-FINAL.html 3 media queries divide width to 4 part. @media (max-width: 400px) @media (max-width: 600px) @media (min-width: 1300px) Web Gallery
  • Responsive mobile design Same content, same logical, but different representation.  同样的内容,同样的逻辑,不同的展示方式。 Use configuration qualifiers to provide different layout for different devices.
  • Configuration qualifiers Screen Size:  small/normal/large/xlarge Density:  ldpi/mdpi/hdpi/xhdpi… Orientation:  port/land Platform version:  v3/v4/v11/v13… Language:  en/fr…
  • New screen size qualifiers Smallest Width  sw600dp Available Width  w600dp Available height  h600dp
  • Web design vs Android design CSS vs Layout CSS pixel vs Dip Ems vs Sp CSS3 media query vs Configuration qualifiers Fluid web design vs Scalable design Responsive web design vs Responsive mobile design
  • App demos IOSched2011 IOSched2012 Google Play
  • IOSched2011 3 fragments 4 layouts
  • IOSched2011 layout/ layout-land/
  • IOSched2011 layout-xlarge-land-v11/ layout-xlarge-v11
  • IOSched2012 4 fragments 4 layouts
  • IOSched2012
  • IOSched2012 layout/ layout-land/
  • IOSched2012 layout-large-v11/ layout-large- land-v11/
  • Google Play Version: 3.4.4 4 layouts generic_details.xml
  • Google Play layout/ layout-land/
  • Google Play layout-w600dp-h540dp/ layout-w800dp- h540dp/
  • UI Design Patterns UI设计模式
  • Android UI design patterns Design pattern  对于一些普遍出现的问题的通用解决方法。 成熟的UI patterns能在不同的设备环境下自我调节。 Here we introduce some useful patterns.  Action Bar  Workspace  Dashboard  Slide navigation
  • Action Bar Replace the old TitleBar. Many functions:  Menu  Search  Navigation  Tab  Spinner  Up  Action Mode  Split Action Bar
  • Action Bar Navigation(Tab)
  • Action Bar Navigation(Spinner)/Split Action Bar/Action Mode
  • Action Bar
  • Workspace A scrollable TabView. Could combine with ActionBar.
  • Workspace
  • Dashboard Acted as the landing page and holds all main functions.
  • Dashboard
  • Slide navigation Could replace the Dashboard. Make the navigation easier. Appearance is better in tablets.
  • Slide navigation
  • Conclusion Android系统实现的Density Independence 在多屏幕 适配中担当了很重要的角色。 在一个app中实现灵活、动态的布局。  think like a web designer 遵从系统的guideline,尽可能多的使用成熟的UI patterns.
  • The EndThanks for watching
  • Contact 欢迎各种交流与切磋 @Renfei Email:renfei@buding.cn 期待你的加入,与布丁一起创造、成长! Welcome to Buding Mobile(布丁移动) Contact:hr@buding.cn
  • Reference http://android-developers.blogspot.com/ https://developer.android.com/ http://www.pushing-pixels.org/ http://www.androiduipatterns.com/ http://androidniceties.tumblr.com/ http://en.wikipedia.org/ http://www.alistapart.com/articles/responsive-web- design/ http://opensignalmaps.com/reports/fragmentation.ph p
  • Q&A Email: renfei@buding.cn
  • Other
  • Most of small/normal devices are handsets ∵ RES.(px) = DPI * SIZE RES.(px) = RES.(dp) * G.DPI / 160 ASSUME G.DPI ≈ DPI ∴ RES.(dp) ≈ SIZE * 160 ∵ normal 的上界是640dp x 480dp 即一个SIZE ≈ 5" (4" * 3")的设备 ∴ normal设备的SIZE大部分小于5 in ∴ normal设备大部分为手机设备 Finish
  • Web demo gallery
  • Web demo gallery
  • Web demo gallery
  • Web demo gallery
  • Web demo gallery
  • Web demo gallery