377 lines
11 KiB
Plaintext
377 lines
11 KiB
Plaintext
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page.title=Android 2.1 Platform
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sdk.platform.version=2.1
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sdk.platform.apiLevel=7
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sdk.platform.majorMinor=minor
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@jd:body
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<div id="qv-wrapper">
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<div id="qv">
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<h2>In this document</h2>
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<ol>
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<li><a href="#features">Platform Highlights</a></li>
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<li><a href="#relnotes">Revisions</a></li>
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<li><a href="#api-level">API Level</a></li>
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<li><a href="#api">Framework API Changes</a>
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<li><a href="#apps">Built-in Applications</a></li>
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<li><a href="#locs">Locales</a></li>
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<li><a href="#skins">Emulator Skins</a></li>
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</ol>
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</li>
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</ol>
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<h2>Reference</h2>
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<ol>
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<li><a
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href="{@docRoot}sdk/api_diff/{@sdkPlatformApiLevel}/changes.html">API
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Differences Report »</a> </li>
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</ol>
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<h2>See Also</h2>
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<ol>
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<li><a href="{@docRoot}sdk/adding-components.html">Adding SDK Components</a></li>
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</ol>
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</div>
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</div>
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<p>
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<em>API Level:</em> <strong>{@sdkPlatformApiLevel}</strong></p>
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<p>Android {@sdkPlatformVersion} is a {@sdkPlatformMajorMinor} platform release
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deployable to Android-powered handsets starting in January 2010.
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This release includes new API
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changes and bug fixes. For information on changes, see the <a href="#api">Framework API</a>
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section.</p>
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<p>For developers, the Android {@sdkPlatformVersion} platform is available as a
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downloadable component for the Android SDK. The downloadable platform includes a
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fully compliant Android library and system image, as well as a set of emulator
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skins, sample applications, and more. The downloadable platform
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includes no external libraries. </p>
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<p>To get started developing or testing against the Android
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{@sdkPlatformVersion} platform, use the Android SDK and AVD Manager tool to
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download the platform into your SDK. For more information,
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see <a href="{@docRoot}sdk/adding-components.html">Adding SDK
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Components</a>.</p>
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<h2 id="features">Platform Highlights</h2>
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<p>Android {@sdkPlatformVersion} does not add significant user features, see the <a
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href="http://developer.android.com/sdk/android-2.0-highlights.html">Android
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2.0 Platform Highlights</a> document for the latest user features.</p>
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<h2 id="relnotes">Revisions</h2>
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<p>The sections below provide notes about successive releases of
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the Android {@sdkPlatformVersion} platform component for the Android SDK, as denoted by
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revision number. To determine what revision(s) of the Android
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{@sdkPlatformVersion} platforms are installed in your SDK environment, refer to
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the "Installed Packages" listing in the Android SDK and AVD Manager.</p>
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<script type="text/javascript">
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function toggleDiv(link) {
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var toggleable = $(link).parent();
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if (toggleable.hasClass("closed")) {
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//$(".toggleme", toggleable).slideDown("fast");
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toggleable.removeClass("closed");
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toggleable.addClass("open");
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$(".toggle-img", toggleable).attr("title", "hide").attr("src", (toRoot + "assets/images/triangle-opened.png"));
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} else {
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//$(".toggleme", toggleable).slideUp("fast");
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toggleable.removeClass("open");
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toggleable.addClass("closed");
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$(".toggle-img", toggleable).attr("title", "show").attr("src", (toRoot + "assets/images/triangle-closed.png"));
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}
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return false;
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}
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</script>
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<style>
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.toggleable {
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padding: .25em 1em 0em 1em;
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margin-bottom: 0;
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}
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.toggleme {
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padding: 1em 1em 0 2em;
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line-height:1em;
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}
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.toggleable a {
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text-decoration:none;
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}
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.toggleme a {
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text-decoration:underline;
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}
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.toggleable.closed .toggleme {
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display:none;
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}
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#jd-content .toggle-img {
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margin:0;
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}
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</style>
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<div class="toggleable opened">
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<a href="#" onclick="return toggleDiv(this)">
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<img src="{@docRoot}assets/images/triangle-opened.png" class="toggle-img" height="9px" width="9px" />
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Android 2.1, Revision 2</a> <em>(May 2010)</em></a>
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<div class="toggleme">
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<dl>
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<dt>Dependencies:</dt>
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<dd>
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<p>Requires SDK Tools r6 or higher.</p>
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</dd>
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<dt>Tools:</dt>
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<dd>
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<ul>
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<li>Adds support for library projects in the Ant build system.</li>
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<li>Adds improved layout rendering in ADT’s visual layout editor.</li>
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</ul>
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</dd>
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</dl>
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</div>
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</div>
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<div class="toggleable closed">
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<a href="#" onclick="return toggleDiv(this)">
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<img src="{@docRoot}assets/images/triangle-closed.png" class="toggle-img" height="9px" width="9px" />
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Android 2.1, Revision 1</a> <em>(January 2010)</em></a>
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<div class="toggleme">
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<dl>
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<dt>Dependencies:</dt>
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<dd>
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<p>Requires SDK Tools r4 or higher.</p>
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</dd>
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</dl>
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</div>
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</div>
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<h2 id="api-level">API Level</h2>
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<p>The Android {@sdkPlatformVersion} platform delivers an updated version of
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the framework API. The Android {@sdkPlatformVersion} API
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is assigned an integer identifier —
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<strong>{@sdkPlatformApiLevel}</strong> — that is
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stored in the system itself. This identifier, called the "API Level", allows the
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system to correctly determine whether an application is compatible with
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the system, prior to installing the application. </p>
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<p>To use APIs introduced in Android {@sdkPlatformVersion} in your
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application, you need to set the proper value, "{@sdkPlatformApiLevel}", in the
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<code>android:minSdkVersion</code> attributes of the <code><uses-sdk></code>
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element in your application's manifest. </p>
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<p>For more information about how to use API Level, see the <a
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href="{@docRoot}guide/appendix/api-levels.html">API Levels</a> document. </p>
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<h2 id="api">Framework API Changes</h2>
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<p>The sections below provide information about changes made to the application
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framework API provided by the Android {@sdkPlatformVersion} platform.</p>
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<h3>Live Wallpapers</h3>
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<p>The following additions provide APIs for you to develop animated wallpapers:</p>
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<ul>
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<li>New {@link android.service.wallpaper} package.</li>
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<li>New {@link android.app.WallpaperInfo} class.</li>
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<li>Updated {@link android.app.WallpaperManager}.</li>
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</ul>
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<p>Additionally, if your application uses or provides Live Wallpapers, you must
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remember to add a <a
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href="{@docRoot}guide/topics/manifest/uses-feature-element.html"><code><uses-feature></code></a>
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element to the application's manifest, declaring the attribute
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<code>android:name="android.software.live_wallpaper"</code>. For example:</p>
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<pre class="no-pretty-print">
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<uses-feature android:name="android.software.live_wallpaper" />
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</pre>
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<p>When you've published your application, Android Market checks for the
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presence of this element and uses it as a filter, ensuring that your application
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is not made available to users whose devices do not support Live Wallpapers.
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</p>
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<h3>Telephony</h3>
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<ul>
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<li>New {@link android.telephony.SignalStrength} class provides information
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about the device's current network signal. This can be acquired from the
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new {@link
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android.telephony.PhoneStateListener#onSignalStrengthsChanged(SignalStrength)}
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callback.</li>
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<li>New {@link
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android.telephony.PhoneStateListener#onDataConnectionStateChanged(int,int)}
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callback.</li>
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</ul>
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<h3>Views</h3>
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<ul>
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<li>New {@link android.view.View} methods {@link android.view.View#isOpaque()}
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and {@link android.view.View#onDrawScrollBars(Canvas)}.</li>
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<li>New {@link android.widget.RemoteViews} methods {@link
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android.widget.RemoteViews#addView(int,RemoteViews)} and {@link
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android.widget.RemoteViews#removeAllViews(int)}.</li>
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<li>New {@link android.view.ViewGroup} methods {@link
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android.view.ViewGroup#isChildrenDrawingOrderEnabled()} and {@link
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android.view.ViewGroup#setChildrenDrawingOrderEnabled(boolean)}.</li>
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</ul>
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<h3>WebKit</h3>
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<ul>
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<li>New {@link android.webkit.WebStorage} methods to manipulate web
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storage databases.</li>
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<li>New {@link android.webkit.GeolocationPermissions} methods to
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get Geolocation permissions from, and set them on the WebView.</li>
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<li>New {@link android.webkit.WebSettings} methods to manage settings for
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app cache, web storage, and zooming based on screen density.</li>
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<li>New {@link android.webkit.WebChromeClient} methods for handling video,
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browsing history, custom Views, app cache limits, and more.</li>
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</ul>
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</ul>
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<!--
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<h3 id="behavior-changes">Behavior changes</h3>
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<h3 id="bug-fixes">Bug fixes</h3>
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-->
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<h3 id="api-diff">API differences report</h3>
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<p>For a detailed view of all API changes in Android {@sdkPlatformVersion} (API
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Level {@sdkPlatformApiLevel}), as compared to API Level 6, see the <a
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href="{@docRoot}sdk/api_diff/{@sdkPlatformApiLevel}/changes.html">API
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|||
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Differences Report</a>.</p>
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<h2 id="apps">Built-in Applications</h2>
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<p>The system image included in the downloadable platform provides these
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built-in applications:</p>
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<table style="border:0;padding-bottom:0;margin-bottom:0;">
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<tr>
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<td style="border:0;padding-bottom:0;margin-bottom:0;">
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<ul>
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<li>Alarm Clock</li>
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<li>Browser</li>
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<li>Calculator</li>
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<li>Camera</li>
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<li>Contacts</li>
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<li>Custom Locale (developer app)</li>
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<li>Dev Tools (developer app)</li>
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<li>Email</li>
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</ul>
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</td>
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<td style="border:0;padding-bottom:0;margin-bottom:0;padding-left:5em;">
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<ul>
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<li>Gallery</li>
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<li>IMEs for Japanese, Chinese, and Latin text input</li>
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<li>Messaging</li>
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<li>Music</li>
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<li>Phone</li>
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<li>Settings</li>
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<li>Spare Parts (developer app)</li>
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</ul>
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</td>
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</tr>
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</table>
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<h2 id="locs" style="margin-top:.75em;">Locales</h2>
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<p>The system image included in the downloadable platform provides a variety of
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built-in locales. In some cases, region-specific strings are available for the
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locales. In other cases, a default version of the language is used. The
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languages that are available in the Android {@sdkPlatformVersion} system
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image are listed below (with <em>language</em>_<em>country/region</em> locale
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descriptor).</p>
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<table style="border:0;padding-bottom:0;margin-bottom:0;">
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<tr>
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<td style="border:0;padding-bottom:0;margin-bottom:0;">
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<ul>
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<li>Chinese, PRC (zh_CN)</li>
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<li>Chinese, Taiwan (zh_TW)</li>
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<li>Czech (cs_CZ)</li>
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<li>Dutch, Netherlands (nl_NL)</li>
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<li>Dutch, Belgium (nl_BE)</li>
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<li>English, US (en_US)</li>
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<li>English, Britain (en_GB)</li>
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<li>English, Canada (en_CA)</li>
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<li>English, Australia (en_AU)</li>
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<li>English, New Zealand (en_NZ)</li>
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<li>English, Singapore(en_SG)</li>
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<li>French, France (fr_FR)</li>
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<li>French, Belgium (fr_BE)</li>
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</ul>
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</td>
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<td style="border:0;padding-bottom:0;margin-bottom:0;padding-left:5em;">
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<li>French, Canada (fr_CA)</li>
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<li>French, Switzerland (fr_CH)</li>
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<li>German, Germany (de_DE)</li>
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<li>German, Austria (de_AT)</li>
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<li>German, Switzerland (de_CH)</li>
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<li>German, Liechtenstein (de_LI)</li>
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<li>Italian, Italy (it_IT)</li>
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<li>Italian, Switzerland (it_CH)</li>
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<li>Japanese (ja_JP)</li>
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<li>Korean (ko_KR)</li>
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<li>Polish (pl_PL)</li>
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<li>Russian (ru_RU)</li>
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<li>Spanish (es_ES)</li>
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</td>
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</tr>
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</table>
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<p>Localized UI strings match the locales that are accessible
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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>
|
|||
|
|
|
|||
|
|
<ul>
|
|||
|
|
<li>
|
|||
|
|
QVGA (240x320, low density, small screen)
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
WQVGA (240x400, low density, normal screen)
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
FWQVGA (240x432, low density, normal screen)
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
HVGA (320x480, medium density, normal screen)
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
WVGA800 (480x800, high density, normal screen)
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
WVGA854 (480x854 high density, normal screen)
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
|
|||
|
|
<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>
|