SampleSyncAdapter sample code.
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+<p>A sample that demonstrates how an application can communicate with cloud-based services and synchronize their data with data stored locally in a content provider.
+The sample uses two related parts of the Android framework — the account manager and the synchronization manager (through a sync adapter).</p>
+
+<p> The <a href="../../../android/accounts/AccountManager">account manager</a> allows sharing of credentials across multiple applications and services.
+Users enter the credentials for each account only once — applications with the <code>USE_CREDENTIALS</code> permission can then query the account manager
+ to obtain an auth token for the account.The authenticator (a pluggable component of account manager) requests credentials from the user, validates them
+ with an authentication server running in the cloud, and then stores them to the AccountManager.
+This sample demonstrates how to write an authenticator for your
+service by extending the new <code><a href="../../../android/accounts/AbstractAccountAuthenticator.html">AbstractAccountAuthenticator</a></code> abstract class.
+</p>
+
+<p>The sync adapter (essential to the synchronization service) declares the account type and ContentProvider authority to the sync manager.
+This sample demosntrates how to write your own sync adapters by extending the <code><a href="../../../android/content/AbstractThreadedSyncAdapter.html">AbstractThreadedSyncAdapter</a></code>
+abstract class and implementing the onPerformSync() method that gets called whenever the sync manager issues a sync operation for that sync adapter.
+</p>
+
+<p> The service for this sample application is running at: <br>
+http://samplesyncadapter.appspot.com/users
+</p>
+
+<p class="note">When you install this sample application, a new syncable "SampleSyncAdapter" account will be added to your phone's account manager.
+You can go to "Settings | Accounts & sync" to view the accounts that are stored in the account manager and to change their sync settings. </p>
+
+<img alt="Screenshot 1" src="../images/SampleSyncAdapter1.png" />
+<img alt="Screenshot 2" src="../images/SampleSyncAdapter2.png" />
+<img alt="Screenshot 3" src="../images/SampleSyncAdapter3.png" />
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