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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 Simple Data</a></li>
     23     <li><a href="{@docRoot}training/secure-file-sharing/index.html">Sharing Files</a>
     24   <li><a
     25 href="http://android-developers.blogspot.com/2009/11/integrating-application-with-intents.html">
     26 Integrating Application with Intents (blog post)</a></li>
     27   <li><a href="{@docRoot}guide/components/intents-filters.html">Intents and Intent
     28 Filters</a></li>
     29 </ul>
     30 
     31 </div>
     32 </div>
     33 
     34 <p>An Android app typically has several <a
     35 href="{@docRoot}guide/components/activities.html">activities</a>. Each activity displays a
     36 user interface that allows the user to perform a specific task (such as view a map or take a photo).
     37 To take the user from one activity to another, your app must use an {@link
     38 android.content.Intent} to define your app's "intent" to do something. When you pass an
     39 {@link android.content.Intent} to the system with a method such as {@link
     40 android.app.Activity#startActivity startActivity()}, the system uses the {@link
     41 android.content.Intent} to identify and start the appropriate app component. Using intents even
     42 allows your app to start an activity that is contained in a separate app.</p>
     43 
     44 <p>An {@link android.content.Intent} can be <em>explicit</em> in order to start a specific component
     45 (a specific {@link android.app.Activity} instance) or <em>implicit</em> in order to start any
     46 component that can handle the intended action (such as "capture a photo").</p>
     47 
     48 <p>This class shows you how to use an {@link android.content.Intent} to perform some basic
     49 interactions with other apps, such as start another app, receive a result from that app, and
     50 make your app able to respond to intents from other apps.</p>
     51 
     52 <h2>Lessons</h2>
     53 
     54 <dl>
     55   <dt><b><a href="sending.html">Sending the User to Another App</a></b></dt>
     56   <dd>Shows how you can create implicit intents to launch other apps that can perform an
     57 action.</dd>
     58   <dt><b><a href="result.html">Getting a Result from an Activity</a></b></dt>
     59   <dd>Shows how to start another activity and receive a result from the activity.</dd>
     60   <dt><b><a href="filters.html">Allowing Other Apps to Start Your Activity</a></b></dt>
     61   <dd>Shows how to make activities in your app open for use by other apps by defining
     62 intent filters that declare the implicit intents your app accepts.</dd>
     63 </dl>
     64 
     65