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<p>Contains the components necessary to create "app widgets", which users can embed in other
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applications (such as the home screen) to quickly access application data and services without
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launching a new activity.</p>
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<p>For more information, see the
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<a href="{@docRoot}guide/topics/appwidgets/index.html">App Widgets</a> guide.</p>
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{@more}
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<p>The behavior of an app widget is published by an "app widget provider." An "app widget host" is
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a component that can contain app widgets (such as the Home screen).</p>
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<p>Any application can publish app widgets (as an app widget provider). All an application needs to
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do to publish an app widget is
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provide a {@link android.content.BroadcastReceiver} that receives the {@link
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android.appwidget.AppWidgetManager#ACTION_APPWIDGET_UPDATE} intent
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and provide some metadata about the app widget. Android provides the
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{@link android.appwidget.AppWidgetProvider} class, which extends {@link
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android.content.BroadcastReceiver}, as a convenience class to define the app widget behavior and aid
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in handling the broadcasts.</p>
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<p>App widget hosts are the containers in which widgets can be placed. Most of the look and feel
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details are left up to the widget hosts. For example, the home screen has one way of viewing
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widgets, but the lock screen could also contain widgets, and it would have a different way of
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adding, removing and otherwise managing widgets.</p>
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<p>For information about implementing an app widget host, see the {@link
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android.appwidget.AppWidgetHost} class.</p>
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