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page.title=Android 2.0.1, Release 1
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<h2>In this document</h2>
<li><a href="#features">Platform Highlights</a></li>
<li><a href="#relnotes">Revisions</a></li>
<li><a href="#apps">Built-in Applications</a></li>
<li><a href="#locs">Locales</a></li>
<li><a href="#skins">Emulator Skins</a></li>
<li><a href="#dev-features">Developer Features</a></li>
<li><a href="#api">Framework API</a>
<li><a href="#api-level">API level</a></li>
<li><a href="#api-changes">API changes summary</a></li>
<li><a href="#behavior-changes">Behavior changes</a></li>
<li><a href="#bug-fixes">Bug fixes</a></li>
differences report &raquo;</a> </li>
<h2>See Also</h2>
<li><a href="{@docRoot}sdk/exploring.html">Exploring the SDK</a></li>
<em>API Level:</em>&nbsp;<strong>{@sdkPlatformApiLevel}</strong></p>
<p>Android {@sdkPlatformVersion} is a {@sdkPlatformMajorMinor} platform release
deployable to Android-powered handsets starting in December 2009.
This release includes minor API
changes, bug fixes and framework behavioral changes. For information on changes
and fixes, see the <a href="#api">Framework API</a> section.</p>
<p>For developers, the Android {@sdkPlatformVersion} platform is available as a
downloadable component for the Android SDK. The downloadable platform includes a
fully compliant Android library and system image, as well as a set of emulator
skins, sample applications, and more. The downloadable platform
includes no external libraries. </p>
<p>To get started developing or testing against the Android
{@sdkPlatformVersion} platform, use the Android SDK and AVD Manager tool to
download the platform into your Android 1.6 or later SDK. For more information,
see <a href="{@docRoot}sdk/exploring.html">Exploring the
<h2 id="features">Platform Highlights</h2>
<p>For a list of new user features and platform highlights, see the <a
2.0 Platform Highlights</a> document.</p>
<h2 id="relnotes">Revisions</h2>
<p>The sections below provide notes about successive releases of
the Android {@sdkPlatformVersion} platform component for the Android SDK, as denoted by
revision number. To determine what revision(s) of the Android
{@sdkPlatformVersion} platforms are installed in your SDK environment, refer to
the "Installed Packages" listing in the Android SDK and AVD Manager.</p>
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Android 2.0.1, Revision 1</a> <em>(December 2009)</em></a>
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<p>Requires SDK Tools r4 or higher.</p>
<h2 id="apps">Built-in Applications</h2>
<p>The system image included in the downloadable platform provides these
built-in applications:</p>
<table style="border:0;padding-bottom:0;margin-bottom:0;">
<td style="border:0;padding-bottom:0;margin-bottom:0;">
<li>Alarm Clock</li>
<li>Custom Locale (developer app)</li>
<li>Dev Tools (developer app)</li>
<td style="border:0;padding-bottom:0;margin-bottom:0;padding-left:5em;">
<li>Gestures Builder</li>
<li>IME for Japanese text input</li>
<li>Spare Parts (developer app)</li>
<p><span class="new">New with 2.0.1</span> The Dev Tools app now
includes a "Sync Tester" application to provide quick and easy testing of
third-party sync adapters.</p>
<h2 id="locs" style="margin-top:.75em;">Locales</h2>
<p>The system image included in the downloadable platform provides a variety of
built-in locales. In some cases, region-specific strings are available for the
locales. In other cases, a default version of the language is used. The
languages that are available in the Android {@sdkPlatformVersion} system
image are listed below (with <em>language</em>_<em>country/region</em> locale
<table style="border:0;padding-bottom:0;margin-bottom:0;">
<td style="border:0;padding-bottom:0;margin-bottom:0;">
<li>Chinese, PRC (zh_CN)</li>
<li>Chinese, Taiwan (zh_TW)</li>
<li>Czech (cs_CZ)</li>
<li>Dutch, Netherlands (nl_NL)</li>
<li>Dutch, Belgium (nl_BE)</li>
<li>English, US (en_US)</li>
<li>English, Britain (en_GB)</li>
<li>English, Canada (en_CA)</li>
<li>English, Australia (en_AU)</li>
<li>English, New Zealand (en_NZ)</li>
<li>English, Singapore(en_SG)</li>
<li>French, France (fr_FR)</li>
<li>French, Belgium (fr_BE)</li>
<td style="border:0;padding-bottom:0;margin-bottom:0;padding-left:5em;">
<li>French, Canada (fr_CA)</li>
<li>French, Switzerland (fr_CH)</li>
<li>German, Germany (de_DE)</li>
<li>German, Austria (de_AT)</li>
<li>German, Switzerland (de_CH)</li>
<li>German, Liechtenstein (de_LI)</li>
<li>Italian, Italy (it_IT)</li>
<li>Italian, Switzerland (it_CH)</li>
<li>Japanese (ja_JP)</li>
<li>Korean (ko_KR)</li>
<li>Polish (pl_PL)</li>
<li>Russian (ru_RU)</li>
<li>Spanish (es_ES)</li>
<p>Localized UI strings match the locales that are accessible
through Settings.</p>
<h2 id="skins">Emulator Skins</h2>
<p>The downloadable platform includes a set of emulator skins that you can use for modeling your application in different screen sizes and resolutions. The emulator skins are: </p>
QVGA (240x320, low density, small screen)
WQVGA (240x400, low density, normal screen)
FWQVGA (240x432, low density, normal screen)
HVGA (320x480, medium density, normal screen)
WVGA800 (480x800, high density, normal screen)
WVGA854 (480x854 high density, normal screen)
<p>For more information about how to develop an application that displays and functions properly on all Android-powered devices, see <a href="{@docRoot}guide/practices/screens_support.html">Supporting Multiple Screens</a>.</p>
<h2 id="dev-features">Developer Features</h2>
<p>The sections below provide information about new developer features offered by the downloadable Android 2.0 platform component.</p>
<h3 id="ant">Ant Support</h3>
<li>Debug- and release-mode application signing. Release-mode signing includes integrated support for <code>zipalign</code> optimization. For more information, see <a href="{@docRoot}tools/publishing/app-signing.html#releasecompile">Signing Your Applications</a>.</li>
<li>Adds new Ant build system with support for Emma instrumentation projects (code coverage).</li>
<h2 id="api">Framework API</h2>
<p>The sections below provide information about changes made to the application
framework API provided by the Android {@sdkPlatformVersion} platform. Note,
however, that Android 2.0.1 is a minor release to Android 2.0, so for more
information about the changes made to in Android 2.0, please refer to the
<a href="{@docRoot}about/versions/android-2.0.html#api">Android 2.0 version notes</a>.</p>
<h3 id="api-level">API level</h3>
<p>The Android {@sdkPlatformVersion} platform delivers an updated version of the framework
API. The Android {@sdkPlatformVersion} API
is assigned an integer identifier &mdash; <strong>{@sdkPlatformApiLevel}</strong> &mdash; that is
stored in the system itself. This identifier, called the "API Level", allows the
system to correctly determine whether an application is compatible with
the system, prior to installing the application. </p>
<p>To use APIs introduced in Android {@sdkPlatformVersion} in your application, you need to
set the proper value, "{@sdkPlatformApiLevel}", in the attributes of the <code>&lt;uses-sdk&gt;</code>
element in your application's manifest. </p>
<p>For more information about how to use API Level, see the <a
href="{@docRoot}guide/topics/manifest/uses-sdk-element.html#ApiLevels">API Levels</a> document. </p>
<h3 id="api-changes">API changes summary</h3>
<p>The following is a summary of changes to the framework APIs.</p>
<li>New {@code quickContactBadgeStyle*} attributes that let
applications apply necessary styles to the {@link
android.widget.QuickContactBadge} widget.</li>
<li>Remove support for the {@link
android.content.Intent#ACTION_CONFIGURATION_CHANGED} broadcast when declared as
a filter in the manifest. To receive this broadcast, an application must
do so from the application at run-time, with {@link
android.content.Context#registerReceiver(BroadcastReceiver, IntentFilter)}.</li>
<h3 id="behavior-changes">Behavior changes</h3>
<p>The following is a summary of changes that affect the behavior of some
framework APIs but do not add or remove API functionality.</p>
<p>Changes to the values returned by {@link
android.bluetooth.BluetoothAdapter#ACTION_REQUEST_ENABLE} and
{@link android.bluetooth.BluetoothAdapter#ACTION_REQUEST_DISCOVERABLE}:</p>
<li>{@link android.bluetooth.BluetoothAdapter#ACTION_REQUEST_ENABLE} now
returns {@link} if Bluetooth was successfully
enabled and {@link} if the user rejected
the request to enable Bluetooth, rather than 0 and -1 (or -2),
<li>{@link android.bluetooth.BluetoothAdapter#ACTION_REQUEST_DISCOVERABLE}
now returns {@link} if the user rejected
the request to enable discoverability or if Bluetooth is not enabled, rather
than -1 and -2, respectively.</li>
<p>The {@link android.content.Intent#ACTION_INSERT} Intent now returns {@link} in cases where the contact was not
persisted (for example, if the save was trimmed to a no-op).</p>
<h3 id="bug-fixes">Bug fixes</h3>
<p>The following is a summary of bug fixes that affect some framework APIs.</p>
<p>The framework now correctly selects application resources in project
folders that use the API Level qualifier. For example, {@code drawable-v4/} is a
folder of drawable resources for API Level 4 (or higher) devices. This version
matching did not work properly and has been fixed.</p>
<p>The {@link android.content.Intent#ACTION_INSERT} Intent now returns the
appropriate kind of URI when the request is made using the (now
deprecated) {@link android.provider.Contacts} APIs.</p>
<h4>Other Framework fixes</h4>
<li>{@link} now properly reports the
package name, rather than the process name.</li>
<h3 id="api-diff">API differences report</h3>
<p>For a detailed view of API changes in Android {@sdkPlatformVersion} (API Level {@sdkPlatformApiLevel}), as compared to
API Level 5, see the <a
Differences Report</a>. There are very few API changes in API Level 6,
so you might also be interested in reviewing the <a
differences between 4 and 5</a>.</p>