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+page.title=Using ICU4J Android Framework APIs
+
+@jd:body
+
+<div id="tb-wrapper">
+<div id="tb">
+<h2>In this document:</h2>
+<ol>
+<li><a href="#compatibility">Compatibility Across Android Releases</a></li>
+    <li><a href="#relation">Relationship to ICU4J</a></li>
+    <li><a href="#migration">Migrating to android.icu APIs from ICU4J </a></li>
+    <li><a href="#licence">Licensing</a></li>
+</ol>
+
+<h2>See Also</h2>
+<ol>
+  <li>
+    <a class="external-link" href=
+    "http://userguide.icu-project.org">Documentation for ICU4J</a>
+  </li>
+
+  <li>
+    <a class="external-link" href=
+    "http://site.icu-project.org/#TOC-What-is-ICU-">Latest standards supported
+    by ICU4J</a>
+  </li>
+</ol>
+</div>
+</div>
+
+<p>
+  ICU4J is an open-source, widely used set of Java libraries providing Unicode
+  and globalization support for software applications. The N Developer Preview
+  exposes a subset of ICU4J APIs in the Android Framework for app developers to
+  use under the {@code android.icu} package. The ICU4J Android Framework uses
+  localization data present on the device and can result in a substantial APK
+  size reduction over apps that include their own copy of ICU4J.
+</p>
+
+<p>
+  This document begins by providing some basic information on the minimum
+  Android API levels required to support these libraries. It then explains what
+  you need to know about the Android-specific implementation of ICU4J. Finally,
+  it tells you how to incorporate android.icu APIs into your app.
+</p>
+
+<h2 id="compatibility">Compatibility Across Android Releases</h2>
+
+<p>
+  The ICU4J Android Framework APIs are provided with the N Developer Preview.
+  If you need to support Android versions prior to the N Developer Preview you
+  should use the techniques described in <a href=
+  "{@docRoot}guide/practices/compatibility.html#Versions">Device
+  Compatibility</a>.
+</p>
+
+<h2 id="relation">Relationship to ICU4J</h2>
+
+<p>
+  The N Developer Preview provides a subset of the full ICU4J APIs under the
+  <code>android.icu</code> package. For example, the N Preview does not expose
+  some deprecated APIs or those that the ICU team have not yet declared as
+  stable. As the ICU team deprecates APIs in future, Android will also mark
+  them as deprecated but will continue to include them.
+</p>
+
+<p class="table-caption"><strong>Table 1.</strong> ICU and CLDR versions used in the N Developer Preview.
+<table>
+<tr>
+<th>Android API level</th>
+<th>ICU version</th>
+<th>CLDR version</th>
+</tr>
+<tr>
+<td>N Developer Preview</td>
+<td>56</td>
+<td>28</td>
+</tr>
+</table>
+
+<p class="note">
+  <b>Note</b>: When using the ICU4J Android Framework APIs you may notice
+  differences between Android releases. For example, the exact text returned
+  from formatters may vary between API levels as they do for existing
+  <code>java.util</code> and <code>java.text</code> classes on Android. These
+  differences are the result of improvements to translations between Android
+  versions.
+</p>
+
+<p>Here are a few important things to note:</p>
+
+<ul>
+<li>The ICU4J Android Framework APIs do not include all the ICU4J APIs.</li>
+<li>Android does not expose the ICU4C APIs for developers using the NDK.</li>
+<li>The ICU4J Android Framework APIs do not replace Android’s support for
+<a href="{@docRoot}guide/topics/resources/localization.html">Localizing with
+Resources</a>.</li>
+</ul>
+
+<h2 id="migration">Migrating to android.icu APIs from ICU4J</h2>
+
+<p>
+  If you are already using ICU4J APIs in your app, and the
+  <code>android.icu</code> APIs meet your requirements, then migrating to
+  <code>android.icu</code> framework requires you to change your Java imports
+  from <code>com.ibm.icu</code> to <code>android.icu.</code> You may then
+  remove your own copy of ICU4J files from the APK.
+</p>
+
+<p class="note">
+  <b>Note</b>: The ICU4J Android Framework exposes the classes in the
+  <code>android.icu</code>
+  package instead of <code>com.ibm.icu</code>. This is to avoid conflicts with
+  a copy of ICU4J that may be included in your app’s .apk file.
+</p>
+
+<h3 id="migrate-from-android">
+  Migrating to android.icu APIs from other Android SDK APIs
+</h3>
+
+<p>
+  Some classes in the <code>java</code> and<code>android</code> packages have
+  equivalents to those found in ICU4J. The ICU4J version often provides more
+  complete support for standards or a wider range of languages.
+</p>
+<p>Here are some examples to get you started:</p>
+<table>
+<tr>
+<th>Class</th>
+<th>Alternatives</th>
+</tr>
+<tr>
+<td><code>java.lang.Character</code> </td>
+<td><code>android.icu.lang.UCharacter</code> </td>
+</tr>
+<tr>
+<td><code>java.text.BreakIterator</code> </td>
+<td><code>android.icu.text.BreakIterator</code> </td>
+</tr>
+<tr>
+<td><code>java.text.DecimalFormat</code> </td>
+<td><code>android.icu.text.DecimalFormat</code> </td>
+</tr>
+<tr>
+<td><code>java.util.Calendar</code></td>
+<td>
+<code>android.icu.util.Calendar</code></td>
+</tr>
+<tr>
+<td><code>android.text.BidiFormatter</code>
+ </td>
+<td><code>android.icu.text.Bidi</code>
+ </td>
+</tr>
+<tr>
+<td><code>android.text.format.DateFormat</code>
+ </td>
+<td><code>android.icu.text.DateFormat</code>
+ </td>
+</tr>
+<tr>
+<td><code>android.text.format.DateUtils</code> </td>
+<td><code>android.icu.text.DateFormat</code>
+<code>android.icu.text.RelativeDateTimeFormatter</code>
+</td>
+</tr>
+</table>
+
+<h2 id="licence">Licensing</h2>
+
+<p>
+  ICU4J is released under a nonrestrictive <a class="external-link" href=
+  "http://source.icu-project.org/repos/icu/icu/trunk/license.html">open source
+  license</a>.
+</p>