1page.title=Designing for Multiple Screens 2page.tags="tablet","tv","fragments","support" 3 4trainingnavtop=true 5startpage=true 6 7@jd:body 8 9<div id="tb-wrapper"> 10<div id="tb"> 11 12<h2>Dependencies and prerequisites</h2> 13 14<ul> 15 <li>Android 1.6 or higher (2.1+ for the sample app)</li> 16 <li>Basic knowledge of <a 17href="http://developer.android.com/guide/components/activities.html">Activities</a> and 18<a href="http://developer.android.com/guide/components/fragments.html">Fragments</a></li> 19 <li>Experience building an Android <a 20href="http://developer.android.com/guide/topics/ui/index.html"> User Interface</a></li> 21 <li>Several features require the use of the <a 22href="{@docRoot}tools/support-library/index.html">support library</a></li> 23</ul> 24 25<h2>You should also read</h2> 26 27<ul> 28 <li><a href="{@docRoot}guide/practices/screens_support.html">Supporting Multiple Screens</a></li> 29</ul> 30 31<h2>Try it out</h2> 32 33<div class="download-box"> 34<a href="http://developer.android.com/shareables/training/NewsReader.zip" class="button">Download 35 the sample app</a> 36<p class="filename">NewsReader.zip</p> 37</div> 38 39</div> 40</div> 41 42<p>Android powers hundreds of device types with several different screen sizes, 43ranging from small phones to large TV sets. Therefore, it’s important 44that you design your application to be compatible with all screen sizes so it’s available to as many 45users as possible.</p> 46 47<p>But being compatible with different device types is not enough. Each screen 48size offers different possibilities and challenges for user interaction, so in 49order to truly satisfy and impress your users, your application must go beyond merely 50<em>supporting</em> multiple screens: it must <em>optimize</em> the user 51experience for each screen configuration.</p> 52 53<p>This class shows you how to implement a user interface that's 54optimized for several screen configurations.</p> 55 56<p>The code in each lesson comes from a sample application that demonstrates best practices in 57optimizing for multiple screens. You can download the sample (to the right) and use it as a source 58of reusable code for your own application.</p> 59 60<p class="note"><strong>Note:</strong> This class and the associated sample use the <a 61href="{@docRoot}tools/support-library/index.html">support library</a> in order to use the {@link 62android.app.Fragment} APIs on versions lower than Android 3.0. You must download and add the 63library to your application in order to use all APIs in this class.</p> 64 65 66<h2>Lessons</h2> 67 68<dl> 69 <dt><b><a href="screensizes.html">Supporting Different Screen Sizes</a></b></dt> 70 <dd>This lesson walks you through how to design layouts that adapts 71 several different screen sizes (using flexible dimensions for 72 views, {@link android.widget.RelativeLayout}, screen size and orientation qualifiers, 73 alias filters, and nine-patch bitmaps).</dd> 74 75 <dt><b><a href="screendensities.html">Supporting Different Screen 76 Densities</a></b></dt> 77 <dd>This lesson shows you how to support screens that have different 78 pixel densities (using density-independent pixels and providing 79 bitmaps appropriate for each density).</dd> 80 81 <dt><b><a href="adaptui.html">Implementing Adaptative UI Flows</a></b></dt> 82 <dd>This lesson shows you how to implement your UI flow in a way 83 that adapts to several screen size/density combinations 84 (run-time detection of active layout, reacting according to 85 current layout, handling screen configuration changes).</dd> 86</dl> 87