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      1 page.title=Interacting with Other Apps
      2 page.tags="intents","activity"
      3 
      4 trainingnavtop=true
      5 startpage=true
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      7 @jd:body
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      9 <div id="tb-wrapper">
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     11 
     12 <h2>Dependencies and prerequisites</h2>
     13 <ul>
     14   <li>Basic understanding of the Activity lifecycle (see <a
     15 href="{@docRoot}training/basics/activity-lifecycle/index.html">Managing the Activity
     16 Lifecycle</a>)</li>
     17 </ul>
     18 
     19 
     20 <h2>You should also read</h2>
     21 <ul>
     22   <li><a href="{@docRoot}training/sharing/index.html">Sharing Content</a></li>
     23   <li><a
     24 href="http://android-developers.blogspot.com/2009/11/integrating-application-with-intents.html">
     25 Integrating Application with Intents (blog post)</a></li>
     26   <li><a href="{@docRoot}guide/components/intents-filters.html">Intents and Intent
     27 Filters</a></li>
     28 </ul>
     29 
     30 </div>
     31 </div>
     32 
     33 <p>An Android app typically has several <a
     34 href="{@docRoot}guide/components/activities.html">activities</a>. Each activity displays a
     35 user interface that allows the user to perform a specific task (such as view a map or take a photo).
     36 To take the user from one activity to another, your app must use an {@link
     37 android.content.Intent} to define your app's "intent" to do something. When you pass an
     38 {@link android.content.Intent} to the system with a method such as {@link
     39 android.app.Activity#startActivity startActivity()}, the system uses the {@link
     40 android.content.Intent} to identify and start the appropriate app component. Using intents even
     41 allows your app to start an activity that is contained in a separate app.</p>
     42 
     43 <p>An {@link android.content.Intent} can be <em>explicit</em> in order to start a specific component
     44 (a specific {@link android.app.Activity} instance) or <em>implicit</em> in order to start any
     45 component that can handle the intended action (such as "capture a photo").</p>
     46 
     47 <p>This class shows you how to use an {@link android.content.Intent} to perform some basic
     48 interactions with other apps, such as start another app, receive a result from that app, and
     49 make your app able to respond to intents from other apps.</p>
     50 
     51 <h2>Lessons</h2>
     52  
     53 <dl>
     54   <dt><b><a href="sending.html">Sending the User to Another App</a></b></dt>
     55   <dd>Shows how you can create implicit intents to launch other apps that can perform an
     56 action.</dd>
     57   <dt><b><a href="result.html">Getting a Result from an Activity</a></b></dt>
     58   <dd>Shows how to start another activity and receive a result from the activity.</dd>
     59   <dt><b><a href="filters.html">Allowing Other Apps to Start Your Activity</a></b></dt>
     60   <dd>Shows how to make activities in your app open for use by other apps by defining
     61 intent filters that declare the implicit intents your app accepts.</dd>
     62 </dl> 
     63 
     64