docs: update backup guide and bmgr tool

elaborate the guide to testing a backup agent and add links between the docs

Change-Id: I35f815d1848c6bd7c6bfaee214f333e35a6cb23c

docs/html/guide/developing/tools/bmgr.jd

@@ -15,6 +15,11 @@ page.title=bmgr
 <li><a href="#other">Other Commands</a></li>
   </ol>
 
+  <h2>See also</h2>
+  <ol>
+    <li><a href="{@docRoot}guide/topics/data/backup.html">Data Backup</a></li>
+  </ol>
+
 </div>
 </div>
 
@@ -26,6 +31,9 @@ and restore operations so that you don't need to repeatedly wipe data or take si
 intrusive steps in order to test your application's backup agent.  These commands are
 accessed via the <a href="{@docRoot}guide/developing/tools/adb.html">adb</a> shell.
 
+<p>For information about adding support for backup in your application, read <a
+href="{@docRoot}guide/topics/data/backup.html">Data Backup</a>, which includes a guide to testing
+your application using {@code bmgr}.</p>
 
 
 <h2 id="backup">Forcing a Backup Operation</h2>
@@ -90,6 +98,8 @@ will happen even if your application is not currently running.
 
 <h2 id="other">Other Commands</h2>
 
+<h3>Wiping data</h3>
+
 <p>The data for a single application can be erased from the active data set on demand.  This is
 very useful while you're developing a backup agent, in case bugs lead you to write corrupt data
 or saved state information. You can wipe an application's data with the <code>bmgr wipe</code>
@@ -102,6 +112,9 @@ you wish to
 erase.  The next backup operation that the application's agent processes will look as
 though the application had never backed anything up before.
 
+
+<h3>Enabling and disabling backup</h3>
+
 <p>You can see whether the Backup Manager is operational at all with the <code>bmgr
 enabled</code> command:
 

docs/html/guide/topics/data/backup.jd

@@ -33,7 +33,7 @@ page.title=Data Backup
     <li><a href="#RestoreVersion">Checking the Restore Data Version</a></li>
     <li><a href="#RequestingBackup">Requesting Backup</a></li>
     <li><a href="#RequestingRestore">Requesting Restore</a></li>
-    <li><a href="#DevelopingTesting">Developing and Testing Your Backup Agent</a></li>
+    <li><a href="#Testing">Testing Your Backup Agent</a></li>
   </ol>
 
   <h2>Key classes</h2>
@@ -43,6 +43,11 @@ page.title=Data Backup
     <li>{@link android.app.backup.BackupAgentHelper}</li>
   </ol>
 
+  <h2>See also</h2>
+  <ol>
+    <li><a href="{@docRoot}guide/developing/tools/bmgr.html">{@code bmgr} tool</a></li>
+  </ol>
+
 </div>
 </div>
 
@@ -308,7 +313,7 @@ backup for all applications that have requested a backup since the last backup w
 
 <p class="note"><strong>Tip:</strong> While developing your application, you can initiate an
 immediate backup operation from the Backup Manager with the <a
-href="{@docRoot}guide/developing/tools/bmgr.html">bmgr tool</a>.</p>
+href="{@docRoot}guide/developing/tools/bmgr.html">{@code bmgr} tool</a>.</p>
 
 <p>When the Backup Manager calls your {@link
 android.app.backup.BackupAgent#onBackup(ParcelFileDescriptor,BackupDataOutput,ParcelFileDescriptor)
@@ -452,7 +457,7 @@ android.app.backup.BackupManager#requestRestore(RestoreObserver) requestRestore(
 href="#RequestingRestore">Requesting restore</a> for more information).</p>
 
 <p class="note"><strong>Note:</strong> While developing your application, you can also request a
-restore operation with the <a href="{@docRoot}guide/developing/tools/bmgr.html">bmgr
+restore operation with the <a href="{@docRoot}guide/developing/tools/bmgr.html">{@code bmgr}
 tool</a>.</p>
 
 <p>When the Backup Manager calls your {@link
@@ -813,7 +818,7 @@ onBackup()}.</p>
 
 <p class="note"><strong>Note:</strong> While developing your application, you can request a
 backup and initiate an immediate backup operation with the <a
-href="{@docRoot}guide/developing/tools/bmgr.html">bmgr
+href="{@docRoot}guide/developing/tools/bmgr.html">{@code bmgr}
 tool</a>.</p>
 
 
@@ -828,25 +833,52 @@ android.app.backup.BackupAgent#onRestore(BackupDataInput,int,ParcelFileDescripto
 implementation, passing the data from the current set of backup data.</p>
 
 <p class="note"><strong>Note:</strong> While developing your application, you can request a
-restore operation with the <a href="{@docRoot}guide/developing/tools/bmgr.html">bmgr
+restore operation with the <a href="{@docRoot}guide/developing/tools/bmgr.html">{@code bmgr}
 tool</a>.</p>
 
 
-<h2 id="DevelopingTesting">Developing and Testing Your Backup Agent</h2>
+<h2 id="Testing">Testing Your Backup Agent</h2>
 
-<p>To develop and test your backup agent:</p>
-<ul>
-  <li>Set your build target to a platform using API Level 8 or higher</li>
-  <li>Run your application on a suitable Android system image:
+<p>Once you've implemented your backup agent, you can test the backup and restore functionality
+with the following procedure, using <a
+href="{@docRoot}guide/developing/tools/bmgr.html">{@code bmgr}</a>.</p>
+
+<ol>
+  <li>Install your application on a suitable Android system image
     <ul>
-      <li>If using the emulator, create and use an AVD with the Google APIs add-on (API Level
-8) &mdash; the Google APIs add-on is available as an SDK component through the SDK and AVD
-Manager</li>
+      <li>If using the emulator, create and use an AVD with Android 2.2 (API Level 8).</li>
       <li>If using a device, the device must be running Android 2.2 or greater and have Android
-Market built in</li>
+Market built in.</li>
     </ul>
   </li>
-  <li>Test your backup agent using the <a href="{@docRoot}guide/developing/tools/bmgr.html">{@code
-bmgr}</a> tool to initiate backup and restore operations</li>
-</ul>
+  <li>Ensure that backup is enabled
+    <ul>
+      <li>If using the emulator, you can enable backup with the following command from your SDK
+{@code tools/} path:
+<pre class="no-pretty-print">adb shell bmgr enable true</pre>
+      </li>
+      <li>If using a device, open the system <b>Settings</b>, select <b>Privacy</b>, then enable
+<b>Back up my data</b> and <b>Automatic restore</b>.
+    </ul>
+  </li>
+  <li>Open your application and initialize some data
+    <p>If you've properly implemented backup in your application, then it should request a
+backup each time the data changes. For example, each time the user changes some data, your app
+should call {@link android.app.backup.BackupManager#dataChanged()}, which adds a backup request to
+the Backup Manager queue. For testing purposes, you can also make a request with the following
+{@code bmgr} command:</p>
+<pre class="no-pretty-print">adb shell bmgr backup <em>your.package.name</em></pre>
+  </li>
+  <li>Initiate a backup operation:
+<pre class="no-pretty-print">adb shell bmgr run</pre>
+    <p>This forces the Backup Manager to perform all backup requests that are in its
+queue.</p>
+  <li>Uninstall your application:
+<pre class="no-pretty-print">adb uninstall <em>your.package.name</em></pre>
+  </li>
+  <li>Re-install your application.</li>
+</ol>
+
+<p>If your backup agent is successful, all the data you initialized in step 4 is restored.</p>
+