framework.jd revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087
19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpage.title=Android Application Framework FAQ 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectparent.title=FAQs, Tips, and How-to 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectparent.link=index.html 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project@jd:body 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<ul> 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li><a href="#1">Do all the Activities and Services of an 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project application run in a single process?</a></li> 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li><a href="#2">Do all Activities run in the main thread of 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project an application process?</a></li> 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li><a href="#3">How do I pass complicated data structures 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project from one Activity/Service to another?</a></li> 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li><a href="#4">How can I check if an Activity is already 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project running before starting it?</a></li> 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li><a href="#5">If an Activity starts a remote service,is 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project there any way for the Service to pass a message back to the Activity?</a></li> 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li><a href="#6">How to avoid getting the Application not 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project responding dialog?</a></li> 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li><a href="#7">How does an application know if a package is 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project added or removed?</a></li> 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project</ul> 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<!-- ------------------------------------------------------------------ --> 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<a name="1" id="1"></a> 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h2>Do all the Activities and Services of an application run in a 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectsingle process?</h2> 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>All Activities and Services in an application run in a single process by 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectdefault. If needed, you can declare an <code>android:process</code> attribute 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectin your manifest file, to explicitly place a component (Activity/Service) in 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectanother process.</p> 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<!-- ------------------------------------------------------------------ --> 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<a name="2" id="2"></a> 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h2>Do all Activities run in the main thread of an application 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectprocess?</h2> 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>By default, all of the application code in a single process runs 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectin the main UI thread. This is the same thread 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectthat also handles UI events. The only exception is the code that handles 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectIPC calls coming in from other processes. The system maintains a 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectseparate pool of transaction threads in each process to dispatch all 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectincoming IPC calls. The developer should create separate threads for any 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectlong-running code, to avoid blocking the main UI thread.</p> 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<!-- ------------------------------------------------------------------ --> 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<a name="3" id="3"></a> 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h2>How do I pass data between Activities/Services within a single 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectapplication?</h2> 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>It depends on the type of data that you want to share:</p> 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h3>Primitive Data Types</h3> 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>To share primitive data between Activities/Services in an 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectapplication, use Intent.putExtras(). For passing primitive data that 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectneeds to persist use the 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<a href="{@docRoot}guide/topics/data/data-storage.html#preferences"> 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectPreferences</a> storage mechanism.</p> 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h3>Non-Persistent Objects</h3> 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>For sharing complex non-persistent user-defined objects for short 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectduration, the following approaches are recommended: 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project</p> 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <h4>The android.app.Application class</h4> 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <p>The android.app.Application is a base class for those who need to 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectmaintain global application state. It can be accessed via 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectgetApplication() from any Activity or Service. It has a couple of 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectlife-cycle methods and will be instantiated by Android automatically if 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectyour register it in AndroidManifest.xml.</p> 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <h4>A public static field/method</h4> 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <p>An alternate way to make data accessible across Activities/Services is to use <em>public static</em> 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectfields and/or methods. You can access these static fields from any other 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectclass in your application. To share an object, the activity which creates your object sets a 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectstatic field to point to this object and any other activity that wants to use 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectthis object just accesses this static field.</p> 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <h4>A HashMap of WeakReferences to Objects</h4> 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <p>You can also use a HashMap of WeakReferences to Objects with Long 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectkeys. When an activity wants to pass an object to another activity, it 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectsimply puts the object in the map and sends the key (which is a unique 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectLong based on a counter or time stamp) to the recipient activity via 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectintent extras. The recipient activity retrieves the object using this 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectkey.</p> 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <h4>A Singleton class</h4> 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <p>There are advantages to using a static Singleton, such as you can 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectrefer to them without casting getApplication() to an 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectapplication-specific class, or going to the trouble of hanging an 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectinterface on all your Application subclasses so that your various 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectmodules can refer to that interface instead. </p> 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>But, the life cycle of a static is not well under your control; so 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectto abide by the life-cycle model, the application class should initiate and 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projecttear down these static objects in the onCreate() and onTerminate() methods 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectof the Application Class</p> 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project</p> 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h3>Persistent Objects</h3> 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>Even while an application appears to continue running, the system 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectmay choose to kill its process and restart it later. If you have data 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectthat you need to persist from one activity invocation to the next, you 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectneed to represent that data as state that gets saved by an activity when 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectit is informed that it might go away.</p> 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>For sharing complex persistent user-defined objects, the 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectfollowing approaches are recommended: 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<ul> 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li>Application Preferences</li> 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li>Files</li> 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li>contentProviders</li> 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <li>SQLite DB</li> 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project</ul> 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project</p> 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>If the shared data needs to be retained across points where the application 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectprocess can be killed, then place that data in persistent storage like 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectApplication Preferences, SQLite DB, Files or ContentProviders. Please refer to 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectthe <a href="{@docRoot}guide/topics/data/data-storage.html">Data Storage</a> 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectfor further details on how to use these components.</p> 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<!-- ------------------------------------------------------------------ --> 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<a name="4" id="4"></a> 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h2>How can I check if an Activity is already running before starting 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectit?</h2> 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>The general mechanism to start a new activity if its not running— 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projector to bring the activity stack to the front if is already running in the 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectbackground— is the to use the NEW_TASK_LAUNCH flag in the startActivity() 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectcall.</p> 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<!-- ------------------------------------------------------------------ --> 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<a name="5" id="5"></a> 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h2>If an Activity starts a remote service, is there any way for the 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectService to pass a message back to the Activity?</h2> 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>The remote service can define a callback interface and register it with the 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectclients to callback into the clients. The 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{@link android.os.RemoteCallbackList RemoteCallbackList} class provides methods to 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectregister and unregister clients with the service, and send and receive 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectmessages.</p> 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>The sample code for remote service callbacks is given in <a 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projecthref="{@docRoot}guide/samples/ApiDemos/src/com/example/android/apis/app/RemoteService.html">ApiDemos/RemoteService</a></p> 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<!-- ------------------------------------------------------------------ --> 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<a name="6" id="6"></a> 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h2>How to avoid getting the Application not responding dialog?</h2> 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>Please read the <a href="{@docRoot}guide/practices/design/responsiveness.html">Designing for Responsiveness</a> 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectdocument.</p> 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<!-- ------------------------------------------------------------------ --> 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<a name="7" id="7"></a> 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<h2>How does an application know if a package is added or removed? 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project</h2> 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<p>Whenever a package is added, an intent with PACKAGE_ADDED action 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectis broadcast by the system. Similarly when a package is removed, an 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectintent with PACKAGE_REMOVED action is broadcast. To receive these 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectintents, you should write something like this: 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<pre> 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <receiver android:name ="com.android.samples.app.PackageReceiver"> 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <intent-filter> 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <action android:name="android.intent.action.PACKAGE_ADDED"/> 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <action android:name="android.intent.action.PACKAGE_REMOVED"/> 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <data android:scheme="package" /> 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project </intent-filter> 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project </receiver> 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project </pre> 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project <br> 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectHere PackageReceiver is a BroadcastReceiver class.Its onReceive() 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectmethod is invoked, every time an application package is installed or 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectremoved. 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project</p> 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project<!-- ------------------------------------------------------------------ --> 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199