1 page.title=Interacting with Other Apps 2 page.tags=intents,activity 3 helpoutsWidget=true 4 5 trainingnavtop=true 6 startpage=true 7 8 @jd:body 9 10 <div id="tb-wrapper"> 11 <div id="tb"> 12 13 <h2>Dependencies and prerequisites</h2> 14 <ul> 15 <li>Basic understanding of the Activity lifecycle (see <a 16 href="{@docRoot}training/basics/activity-lifecycle/index.html">Managing the Activity 17 Lifecycle</a>)</li> 18 </ul> 19 20 21 <h2>You should also read</h2> 22 <ul> 23 <li><a href="{@docRoot}training/sharing/index.html">Sharing Simple Data</a></li> 24 <li><a href="{@docRoot}training/secure-file-sharing/index.html">Sharing Files</a> 25 <li><a 26 href="http://android-developers.blogspot.com/2009/11/integrating-application-with-intents.html"> 27 Integrating Application with Intents (blog post)</a></li> 28 <li><a href="{@docRoot}guide/components/intents-filters.html">Intents and Intent 29 Filters</a></li> 30 </ul> 31 32 </div> 33 </div> 34 35 <p>An Android app typically has several <a 36 href="{@docRoot}guide/components/activities.html">activities</a>. Each activity displays a 37 user interface that allows the user to perform a specific task (such as view a map or take a photo). 38 To take the user from one activity to another, your app must use an {@link 39 android.content.Intent} to define your app's "intent" to do something. When you pass an 40 {@link android.content.Intent} to the system with a method such as {@link 41 android.app.Activity#startActivity startActivity()}, the system uses the {@link 42 android.content.Intent} to identify and start the appropriate app component. Using intents even 43 allows your app to start an activity that is contained in a separate app.</p> 44 45 <p>An {@link android.content.Intent} can be <em>explicit</em> in order to start a specific component 46 (a specific {@link android.app.Activity} instance) or <em>implicit</em> in order to start any 47 component that can handle the intended action (such as "capture a photo").</p> 48 49 <p>This class shows you how to use an {@link android.content.Intent} to perform some basic 50 interactions with other apps, such as start another app, receive a result from that app, and 51 make your app able to respond to intents from other apps.</p> 52 53 <h2>Lessons</h2> 54 55 <dl> 56 <dt><b><a href="sending.html">Sending the User to Another App</a></b></dt> 57 <dd>Shows how you can create implicit intents to launch other apps that can perform an 58 action.</dd> 59 <dt><b><a href="result.html">Getting a Result from an Activity</a></b></dt> 60 <dd>Shows how to start another activity and receive a result from the activity.</dd> 61 <dt><b><a href="filters.html">Allowing Other Apps to Start Your Activity</a></b></dt> 62 <dd>Shows how to make activities in your app open for use by other apps by defining 63 intent filters that declare the implicit intents your app accepts.</dd> 64 </dl> 65 66
