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docs: update the honeycomb preview version notes

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Change-Id: I5364ef351095a23914f75ae109d21cb4d9c09e01
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Scott Main
2011-01-21 14:51:33 -08:00
parent 3a56ce3ab3
commit d41ff8e1a4
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docs/html/sdk/android-3.0.jd
View File

@@ -1,4 +1,4 @@
page.title=Android 3.0 Platform
page.title=Android 3.0 Platform Preview
@jd:body
<div id="qv-wrapper">
@@ -6,6 +6,7 @@ page.title=Android 3.0 Platform
<h2>In this document</h2>
<ol>
<li><a href="#relnotes">Revisions</a></li>
<li><a href="#api">API Overview</a></li>
<li><a href="#api-level">API Level</a></li>
<li><a href="#apps">Built-in Applications</a></li>
@@ -28,11 +29,17 @@ Differences Report &raquo;</a> </li>
</div>
</div>
</p>API Level: <b>Honeycomb</b></p>
<p><em>API Level:</em> <b>Honeycomb</b></p>
<p>For developers, the Android 3.0 preview is available as a downloadable component for the
Android SDK. The downloadable platform includes an Android library and system image, as well as a
set of emulator skins and more. The downloadable platform includes no external libraries.</p>
Android SDK.</p>
<p class="note"><strong>Note:</strong> Read the <a
href="{@docRoot}sdk/preview/start.html">Getting Started</a> guide for important information
about setting up your development environment and limitiations of the Android 3.0 preview.</p>
@@ -43,8 +50,6 @@ set of emulator skins and more. The downloadable platform includes no external l
including new features and changes in the framework API since the previous version.</p>
<h3>Fragments</h3>
<p>A fragment is a new framework component that allows you to separate distinct elements of an
@@ -185,98 +190,63 @@ href="{@docRoot}resources/samples/NotePad/index.html">NotePad</a> sample applica
<p>New APIs now facilitate the ability for your application to implement drag and drop
functionality in the UI.</p>
<p>To drag a {@link android.view.View} in your activity, call {@link android.view.View#startDrag
startDrag()} on the object, providing a {@link android.content.ClipData} object that represents the
information to drag, a {@link android.view.View.DragShadowBuilder} to facilitate the "shadow" that
the user sees while dragging, and an {@link java.lang.Object} that can share information about the
drag object with views that may receive the object. However, </p>
<p>To begin dragging content in your activity, call {@link android.view.View#startDrag startDrag()}
on a {@link android.view.View}, providing a {@link android.content.ClipData} object that represents
the information to drag, a {@link android.view.View.DragShadowBuilder} to facilitate the "shadow"
that the user sees while dragging, and an {@link java.lang.Object} that can share information about
the drag object with views that may receive the object.</p>
<p>To accept a drag object (receive the "drop") in a
{@link android.view.View}, register the view with an {@link android.view.View.OnDragListener} by
calling {@link android.view.View#setOnDragListener setOnDragListener()}. When a drag event occurs on
the view, the system calls {@link android.view.View.OnDragListener#onDrag onDrag()} for the {@link
android.view.View.OnDragListener}, which receives a {@link android.view.DragEvent} describing
the type of event has occurred (such as "drag started", "drag ended", and "drop"). The receiving
view can inquire the event type delivered to {@link
android.view.View#onDragEvent onDragEvent()} by calling {@link
android.view.DragEvent#getAction getAction()} on the {@link android.view.DragEvent}.</p>
android.view.View.OnDragListener}, which receives a {@link android.view.DragEvent} describing the
type of event has occurred (such as "drag started", "drag ended", and "drop"). During a drag
operation, there is a stream of drag events, so the system calls {@link
android.view.View.OnDragListener#onDrag onDrag()} repeatedly on the view. The receiving view can
inquire the event type delivered to {@link android.view.View#onDragEvent onDragEvent()} by calling
{@link android.view.DragEvent#getAction getAction()} on the {@link android.view.DragEvent}.</p>
<p>Although a drag event may carry a {@link android.content.ClipData} object, drag and drop does
not depend on the clipboard. The data being dragged is sent to the system as {@link
android.content.ClipData} and the system sends it to {@link android.view.View} objects in the
{@link android.view.DragEvent}. A drag and drop operation should never put the dragged data on the
clipboard.</p>
<p>Although a drag event may carry a {@link android.content.ClipData} object, this is not related
to the system clipboard. The data being dragged is passed as a {@link
android.content.ClipData} object to {@link android.view.View#startDrag startDrag()} and the system
sends it to the receiving {@link android.view.View} in the {@link android.view.DragEvent} sent to
{@link android.view.View.OnDragListener#onDrag onDrag()}. A drag and drop operation should never
put the dragged data in the global system clipboard.</p>
<h3>Multiple-choice selection for ListView and GridView</h3>
<p>New {@link android.widget.AbsListView#CHOICE_MODE_MULTIPLE_MODAL} mode for {@link
android.widget.AbsListView#setChoiceMode setChoiceMode()} allows for selecting multiple items
from a {@link android.widget.ListView} and {@link android.widget.GridView}.</p>
<p>To enable multiple-choice selection, call {@link
android.widget.AbsListView#setChoiceMode setChoiceMode(CHOICE_MODE_MULTIPLE_MODAL)} and register a
{@link android.widget.AbsListView.MultiChoiceModeListener} with {@link
android.widget.AbsListView#setMultiChoiceModeListener setMultiChoiceModeListener()}.</p>
<p>When the user performs a long-press on an item, the Action Bar switches to the Multi-choice
Action Mode. The system notifies the {@link android.widget.AbsListView.MultiChoiceModeListener}
when items are selected by calling {@link
android.widget.AbsListView.MultiChoiceModeListener#onItemCheckedStateChanged
onItemCheckedStateChanged()}.</p>
<p>For an example of multiple-choice selection, see the <a
href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/view/List15.html">List15.java</a>
class in the API Demos sample application.</p>
<h3>Content loaders</h3>
<p>New framework APIs facilitate asynchronous loading of data using the {@link
android.content.Loader} class. You can use it in combination with UI components such as views and
fragments to dynamically load data from background threads. The {@link
android.content.CursorLoader} subclass is specially designed to help do so for data queried from
a {@link android.content.ContentResolver}.</p>
<h3>Extended app widgets</h3>
<h3>App widgets</h3>
<p>App widgets can now be more interactive with scrolling list views, grid views, view flippers, and
a new 3D stack widget.</p>
<p>Android 3.0 supports several new widget classes for App Widgets, including:</p>
<ul>
<li>{@link android.widget.GridView}</li>
<li>{@link android.widget.ListView}</li>
<li>{@link android.widget.StackView}</li>
<li>{@link android.widget.ViewFlipper}</li>
<li>{@link android.widget.AdapterViewFlipper}</li>
</ul>
<p>Android 3.0 supports several new widget classes for app widgets, including: {@link
android.widget.GridView}, {@link android.widget.ListView}, {@link android.widget.StackView}, {@link
android.widget.ViewFlipper}, and {@link android.widget.AdapterViewFlipper}.</p>
<p>You can use the new {@link android.widget.RemoteViewsService} to populate the new remote
collection views ({@link android.widget.GridView}, {@link android.widget.ListView}, and {@link
android.widget.StackView}).</p>
<p>You can also use two new {@link android.appwidget.AppWidgetProviderInfo} fields. The {@link
<p>{@link android.appwidget.AppWidgetProviderInfo} also supports two new fields: {@link
android.appwidget.AppWidgetProviderInfo#autoAdvanceViewId} and {@link
android.appwidget.AppWidgetProviderInfo#previewImage}. The {@link
android.appwidget.AppWidgetProviderInfo#autoAdvanceViewId} field lets you specify the view ID of the
app widget subview, which is auto-advanced by the app widget’s host. The
{@link android.appwidget.AppWidgetProviderInfo#previewImage} field specifies a preview of what the
App Widget looks like and is shown to the user from the widget picker. If this field is not
supplied, the app widget's icon is used for the preview.</p>
<p>Android also provides a new widget preview tool (WidgetPreview), located in the SDK tools. The
tool lets you take a screenshot of your app widget, which you can use to populate the customization
tray.</p>
<p>Android also provides a new widget preview tool (WidgetPreview), located in the SDK tools, to
take a screenshot of your app widget, which you can use when specifying the {@link
android.appwidget.AppWidgetProviderInfo#previewImage} field.</p>
<h3>Extended status bar notifications</h3>
<h3>Status bar notifications</h3>
<p>The {@link android.app.Notification} APIs have been extended to support more content-rich status
bar notifications, plus a new {@link android.app.Notification.Builder} class allows you to easily
@@ -296,9 +266,34 @@ android.app.PendingIntent}s, for more interactive notification widgets
<h3>New animation framework</h3>
<h3>Content loaders</h3>
<p>An all new flexible animation framework that allows you to animate the properties of any object
<p>New framework APIs facilitate asynchronous loading of data using the {@link
android.content.Loader} class. You can use it in combination with UI components such as views and
fragments to dynamically load data from background threads. The {@link
android.content.CursorLoader} subclass is specially designed to help do so for data queried from
a {@link android.content.ContentResolver}.</p>
<h3>Bluetooth A2DP and headset APIs</h3>
<p>Android now includes APIs for applications to verify the state of connected Bluetooth A2DP and
headset profile devices. You can initialize the respective {@link
android.bluetooth.BluetoothProfile} by calling {@link
android.bluetooth.BluetoothAdapter#getProfileProxy getProfileProxy()} with either the {@link
android.bluetooth.BluetoothProfile#A2DP} or {@link android.bluetooth.BluetoothProfile#HEADSET}
profile constant and a {@link android.bluetooth.BluetoothProfile.ServiceListener} to receive
callbacks when the client is connected or disconnected.</p>
<h3>Animation framework</h3>
<p>An all new flexible animation framework allows you to animate the properties of any object
(View, Drawable, Fragment, Object, anything). It allows you to define many aspects of an animation,
such as:</p>
<ul>
@@ -320,7 +315,21 @@ android.animation.ValueAnimator} computes the animation values, but is not aware
object or property that is animated as a result. It simply performs the calculations, and you must
listen for the updates and process the data with your own logic. The {@link
android.animation.ObjectAnimator} is a subclass of {@link android.animation.ValueAnimator} and
allows you to set the object and property to animate, so you do not have to listen for updates.</p>
allows you to set the object and property to animate, and it handles all animation work.
That is, you give the {@link android.animation.ObjectAnimator} the object to animate, the
property of the object to change over time, and a set of values to apply to the property over
time in order to animate it, then start the animation.</p>
<p>Additionally, the {@link android.animation.LayoutTransition} class enables automatic transition
animations for changes you make to your activity layout. To enable transitions for a {@link
android.view.ViewGroup}, create a {@link android.animation.LayoutTransition} object and set it on
any {@link android.view.ViewGroup} by calling {@link
android.view.ViewGroup#setLayoutTransition setLayoutTransition()}. This causes default
animations to run whenever items are added to or removed from the group. To specify custom
animations, call {@link android.animation.LayoutTransition#setAnimator setAnimator()} on the {@link
android.animation.LayoutTransition} to provide a custom {@link android.animation.Animator},
such as a {@link android.animation.ValueAnimator} or {@link android.animation.ObjectAnimator}
discussed above.</p>
<p>For more information, see the <a
href="{@docRoot}guide/topics/graphics/animation.html">Animation</a> developer guide.</p>
@@ -328,73 +337,67 @@ href="{@docRoot}guide/topics/graphics/animation.html">Animation</a> developer gu
<h3>New widgets</h3>
<h3>Extended UI framework</h3>
<ul>
<li>{@link android.widget.AdapterViewAnimator}
<p>Base class for an {@link android.widget.AdapterView} that performs animations when switching
between its views.</p></li>
<li><b>Multiple-choice selection for ListView and GridView</b>
<li>{@link android.widget.AdapterViewFlipper}
<p>Simple {@link android.widget.ViewAnimator} that animates between two or more views that have
been added to it. Only one child is shown at a time. If requested, it can automatically flip between
each child at a regular interval.</p></li>
<p>New {@link android.widget.AbsListView#CHOICE_MODE_MULTIPLE_MODAL} mode for {@link
android.widget.AbsListView#setChoiceMode setChoiceMode()} allows for selecting multiple items
from a {@link android.widget.ListView} and {@link android.widget.GridView}.</p>
<li>{@link android.widget.CalendarView}
<p>Allows users to select dates from a calendar and you can configure the range of dates
available. A user can select a date by tapping on it and can scroll and fling
the calendar to a desired date.</p></li>
<p>To enable multiple-choice selection, call {@link
android.widget.AbsListView#setChoiceMode setChoiceMode(CHOICE_MODE_MULTIPLE_MODAL)} and register a
{@link android.widget.AbsListView.MultiChoiceModeListener MultiChoiceModeListener} with {@link
android.widget.AbsListView#setMultiChoiceModeListener setMultiChoiceModeListener()}.</p>
<li>{@link android.widget.ListPopupWindow}
<p>Anchors itself to a host view and displays a list of choices, such as for a list of
suggestions when typing into an {@link android.widget.EditText} view.</p></li>
<p>When the user performs a long-press on an item, the Action Bar switches to the Multi-choice
Action Mode. The system notifies the {@link android.widget.AbsListView.MultiChoiceModeListener
MultiChoiceModeListener} when items are selected by calling {@link
android.widget.AbsListView.MultiChoiceModeListener#onItemCheckedStateChanged
onItemCheckedStateChanged()}.</p>
<li>{@link android.widget.NumberPicker}
<p>Enables the user to select a number from a predefined range. The widget presents an
input field and up and down buttons for selecting a number. Touching the input field shows a
scroll wheel that allows the user to scroll through values or touch again to directly edit the
current value. It also allows you to map from positions to strings, so that
the corresponding string is displayed instead of the position index.</p></li>
<p>For an example of multiple-choice selection, see the <a
href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/view/List15.html">List15.
java</a>
class in the API Demos sample application.</p>
</li>
<li>{@link android.widget.PopupMenu}
<p>Displays a {@link android.view.Menu} in a modal popup window that's anchored to a view. The popup
appears below the anchor view if there is room, or above it if there is not. If the IME (soft
keyboard) is visible, the popup does not overlap it until it is touched.</p></li>
<li><b>New APIs to transform views</b>
<p>New APIs allow you to easily apply 2D and 3D transformations to {@link
android.view.View}s in your activity layout, using a set of object properties that define the view's
layout position, orientation, transparency and more.</p>
<p>New methods to set properties include: {@link android.view.View#setAlpha setAlpha()}, {@link
android.view.View#setBottom setBottom()}, {@link android.view.View#setLeft setLeft()}, {@link
android.view.View#setRight setRight()}, {@link android.view.View#setBottom setBottom()}, {@link
android.view.View#setPivotX setPivotX()}, {@link android.view.View#setPivotY setPivotY()}, {@link
android.view.View#setRotationX setRotationX()}, {@link android.view.View#setRotationY
setRotationY()}, {@link android.view.View#setScaleX setScaleX()}, {@link android.view.View#setScaleY
setScaleY()}, {@link android.view.View#setAlpha setAlpha()}, and others.</p>
<li>{@link android.widget.SearchView}
<p>Provides a search box that works in conjunction with a search provider (in the same manner as
the traditional <a href="{@docRoot}guide/topics/search/search-dialog.html">search dialog</a>). It
also displays recent query suggestions or custom suggestions as configured by the search
provider. This widget is particularly useful for offering search in the Action Bar.</p></li>
<p>Some methods also have a corresponding XML attribute that you can specify in your layout
file. Available attributes include: {@code translationX}, {@code translationY}, {@code rotation},
{@code rotationX}, {@code rotationY}, {@code scaleX}, {@code scaleY}, {@code transformPivotX},
{@code transformPivotY}, and {@code alpha}.</p>
<li>{@link android.widget.StackView}
<p>A view that displays its children in a 3D stack and allows users to discretely swipe through the
children.</p></li>
<p>Using some of these new properties in combination with the new animation framework (discussed
previously), you can easily create some fancy animations to your views. For example, to rotate a
view on its y-axis, supply {@link android.animation.ObjectAnimator} with the {@link
android.view.View}, the "rotationY" property, and the values to use:</p>
<pre>
ObjectAnimator animator = ObjectAnimator.ofFloat(myView, "rotationY", 0, 360);
animator.setDuration(2000);
animator.start();
</pre>
</li>
</ul>
<li><b>New holographic themes</b>
<h3>Redesigned widgets</h3>
<p>Android 3.0 offers an updated set of UI widgets that developers can use to quickly add new types
of content to their applications. The new UI widgets are redesigned for use on larger screens such
as tablets and incorporate the new holographic UI theme. Several new widget types are available,
including a 3D stack, search box, a date/time picker, number picker, stack, calendar View etc.
SearchView, PopupMenu, and others. Most of the redesigned widgets can now be used as remote views in
homescreen widgets. Applications written for earlier versions can inherit the new widget designs and
themes.</p>
<h3>Holographic themes</h3>
<p>The standard system widgets and overall look have been redesigned for use on larger screens
<p>The standard system widgets and overall look have been redesigned for use on larger screens
such as tablets and incorporate the new holographic UI theme. These style changes are applied
using the standard <a href="{@docRoot}guide/topics/ui/themes.html">style and theme</a> system.
Any application that targets the Android 3.0 platform inherit the holographic theme by default.
@@ -404,19 +407,63 @@ theme, unless you update your styles to inherit them.</p>
<p>To apply the holographic theme to individual activities or to inherit them in your own theme
definitions, you can use one of several new {@link android.R.style#Theme_Holo Theme.Holo}
themes.</p>
</li>
<li><b>New widgets</b>
<ul>
<li>{@link android.widget.AdapterViewAnimator}
<p>Base class for an {@link android.widget.AdapterView} that performs animations when switching
between its views.</p></li>
<li>{@link android.widget.AdapterViewFlipper}
<p>Simple {@link android.widget.ViewAnimator} that animates between two or more views that have
been added to it. Only one child is shown at a time. If requested, it can automatically flip
between
each child at a regular interval.</p></li>
<li>{@link android.widget.CalendarView}
<p>Allows users to select dates from a calendar and you can configure the range of dates
available. A user can select a date by tapping on it and can scroll and fling
the calendar to a desired date.</p></li>
<li>{@link android.widget.ListPopupWindow}
<p>Anchors itself to a host view and displays a list of choices, such as for a list of
suggestions when typing into an {@link android.widget.EditText} view.</p></li>
<li>{@link android.widget.NumberPicker}
<p>Enables the user to select a number from a predefined range. The widget presents an
input field and up and down buttons for selecting a number. Touching the input field shows a
scroll wheel that allows the user to scroll through values or touch again to directly edit the
current value. It also allows you to map from positions to strings, so that
the corresponding string is displayed instead of the position index.</p></li>
<li>{@link android.widget.PopupMenu}
<p>Displays a {@link android.view.Menu} in a modal popup window that's anchored to a view. The
popup
appears below the anchor view if there is room, or above it if there is not. If the IME (soft
keyboard) is visible, the popup does not overlap it until it is touched.</p></li>
<li>{@link android.widget.SearchView}
<p>Provides a search box that works in conjunction with a search provider (in the same manner as
the traditional <a href="{@docRoot}guide/topics/search/search-dialog.html">search dialog</a>).
It
also displays recent query suggestions or custom suggestions as configured by the search
provider. This widget is particularly useful for offering search in the Action Bar.</p></li>
<li>{@link android.widget.StackView}
<p>A view that displays its children in a 3D stack and allows users to discretely swipe through
the
children.</p></li>
</ul>
</li>
</ul>
<h3>Bluetooth A2DP and headset APIs</h3>
<p>Android now includes APIs for applications to verify the state of connected Bluetooth A2DP and
headset profile devices. You can initialize the respective {@link
android.bluetooth.BluetoothProfile} by calling {@link
android.bluetooth.BluetoothAdapter#getProfileProxy getProfileProxy()} with either the {@link
android.bluetooth.BluetoothProfile#A2DP} or {@link android.bluetooth.BluetoothProfile#HEADSET}
profile constant and a {@link android.bluetooth.BluetoothProfile.ServiceListener} to receive
callbacks when the client is connected or disconnected.</p>
<!--
<h3>WebKit</h3>
@@ -427,7 +474,7 @@ callbacks when the client is connected or disconnected.</p>
<h3>Graphics</h3>
<ul>
<li><h4>Hardware accelerated 2D graphics</h4>
<li><b>Hardware accelerated 2D graphics</b>
<p>You can now enable the OpenGL renderer for your application by setting {@code
android:hardwareAccelerated="true"} in your manifest element's <a
@@ -439,7 +486,29 @@ elements.</p>
<p>This flag helps applications by making them draw faster. This results in smoother animations,
smoother scrolling, and overall better performance and response to user interaction.</p></li>
<li><h4>Renderscript 3D graphics engine</h4>
<li><b>View support for hardware and software layers</b>
<p>By default, a {@link android.view.View} has no layer specified. You can specify that the
view be backed by either a hardware or software layer, specified by values {@link
android.view.View#LAYER_TYPE_HARDWARE} and {@link android.view.View#LAYER_TYPE_SOFTWARE}, using
{@link android.view.View#setLayerType setLayerType()} or the <a
href="{@docRoot}reference/android/view/View.html#attr_android:layerType">{@code layerType}</a>
attribute.</p>
<p>A hardware layer is backed by a hardware specific texture (generally Frame Buffer Objects or
FBO on OpenGL hardware) and causes the view to be rendered using Android's hardware rendering
pipeline, but only if hardware acceleration is turned on for the view hierarchy. When hardware
acceleration is turned off, hardware layers behave exactly as software layers.</p>
<p>A software layer is backed by a bitmap and causes the view to be rendered using Android's
software rendering pipeline, even if hardware acceleration is enabled. Software layers should be
avoided when the affected view tree updates often. Every update will require to re-render the
software layer, which can potentially be slow.</p>
<p>For more information, see the {@link android.view.View#LAYER_TYPE_HARDWARE} and {@link
android.view.View#LAYER_TYPE_SOFTWARE} documentation.</p>
</li>
<li><b>Renderscript 3D graphics engine</b>
<p>Renderscript is a runtime 3D framework that provides both an API for building 3D scenes as well
as a special, platform-independent shader language for maximum performance. Using Renderscript, you
@@ -450,12 +519,11 @@ high-performance 3D effects for applications, wallpapers, carousels, and more.</
<h3>Media</h3>
<ul>
<li><h4>Camcorder profiles</h4>
<li><b>Camcorder profiles</b>
<p>New {@link android.media.CamcorderProfile#hasProfile hasProfile()} method and several video
quality profiles, such as {@link android.media.CamcorderProfile#QUALITY_1080P}, {@link
@@ -463,27 +531,20 @@ android.media.CamcorderProfile#QUALITY_720P}, {@link
android.media.CamcorderProfile#QUALITY_CIF}, and more, to determine the camcorder quality
profiles.</p></li>
<li><h4>Time lapse video mode</h4>
<li><b>Time lapse video mode</b>
<p>Camcorder APIs now support the ability to record time lapse video. The {@link
android.media.MediaRecorder#setCaptureRate setCaptureRate()} sets the rate at which frames
should be captured.</p></li>
<li><h4>Digital media file transfer</h4>
<p>The platform includes built-in support for Media/Picture Transfer Protocol (MTP/PTP) over USB,
which lets users easily transfer any type of media files between devices and to a host computer.
Developers can take advantage of this to create applications that let users create or manage files
that they may want to transfer across devices.</p></li>
<li><h4>Digital Media File Transfer</h4>
<li><b>Digital media file transfer</b>
<p>The platform includes built-in support for Media/Picture Transfer Protocol (MTP/PTP) over USB,
which lets users easily transfer any type of media files between devices and to a host computer.
Developers can build on this support, creating applications that let users create or manage rich
media files that they may want to transfer or share across devices. </p></li>
<li><h4>Digital rights management (DRM)</h4>
<li><b>Digital rights management (DRM)</b>
<p>New extensible digital rights management (DRM) framework for checking and enforcing digital
rights. It's implemented in two architectural layers:</p>

18
docs/html/sdk/preview/start.jd
View File

@@ -100,6 +100,24 @@ used to quickly relaunch the AVD next time. However, when you choose to save a s
emulator will be slow to close, so you might want to enable <b>Save to
snapshot</b> only for the first time you launch the AVD.</p>
<h4>Other emulator issues</h4>
<p>The following known issues occur for Android 3.0 AVDs that are loaded in the emulator:</p>
<ul>
<li>You cannot take screenshots of an emulator screen. The Device Screen
Capture window displays <strong>Screen not available</strong>.</li>
<li>The emulator cannot receive incoming SMS messages.</li>
<li>GPS emulation is currently not supported.</li>
<li>When rotating the emulator screen by pressing Ctrl-F11, the screen turns green momentarily,
then displays the normal interface.</li>
<li>In some circumstances, the emulator displays a rotated portrait screen while in landscape
mode. To view the screen correctly, rotate the emulator to portrait mode by pressing Ctrl-F11 or
turn off the auto-rotate setting in <strong>Settings > Screen > Auto-rotate screen</strong>.</li>
<li>The Dev Tools application sometimes crashes when trying to use the Package Browser
feature.</li>
<li>On Ubuntu 10.04 64-bit machines, you cannot create an AVD that have an SD card.</li>
</ul>
<h2 id="Optimize">Optimize Your Application for Tablets</h2>