AccessibilityEventSource

public interface AccessibilityEventSource

android.view.accessibility.AccessibilityEventSource

Known Indirect Subclasses

AbsListView,AbsSeekBar,AbsSpinner,AbsoluteLayout,ActionMenuView,AdapterView<T extends Adapter>,AdapterViewAnimator,AdapterViewFlipper,and 132 others.

AbsListView	Base class that can be used to implement virtualized lists of items.
AbsSeekBar	AbsSeekBar extends the capabilities of ProgressBar by adding a draggable thumb.
AbsSpinner	An abstract base class for spinner widgets.
AbsoluteLayout	This class was deprecated in API level 3. Use `FrameLayout`, `RelativeLayout` or a custom layout instead.
ActionMenuView	ActionMenuView is a presentation of a series of menu options as a View.
AdapterView<T extends Adapter>	An AdapterView is a view whose children are determined by an `Adapter`.
AdapterViewAnimator	Base class for a `AdapterView` that will perform animations when switching between its views.
AdapterViewFlipper	Simple `ViewAnimator` that will animate between two or more views that have been added to it.
AnalogClock	This class was deprecated in API level 23. This widget is no longer supported.
AppBarLayout	AppBarLayout is a vertical `LinearLayout` which implements many of the features of material designs app bar concept, namely scrolling gestures.
AppCompatAutoCompleteTextView	A `AutoCompleteTextView` which supports compatible features on older version of the platform, including: Supports `textAllCaps` style attribute which works back to `Gingerbread`.
AppCompatButton	A `Button` which supports compatible features on older version of the platform, including: Supports `textAllCaps` style attribute which works back to `Gingerbread`.
AppCompatCheckBox	A `CheckBox` which supports compatible features on older version of the platform, including: Allows dynamic tint of its background via the background tint methods in `CompoundButtonCompat`.
AppCompatCheckedTextView	A `CheckedTextView` which supports compatible features on older version of the platform.
AppCompatEditText	A `EditText` which supports compatible features on older version of the platform, including: Supports `textAllCaps` style attribute which works back to `Gingerbread`.
AppCompatImageButton	A `ImageButton` which supports compatible features on older version of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatImageView	A `ImageView` which supports compatible features on older version of the platform, including: Allows dynamic tint of its background via the background tint methods in `ViewCompat`.
AppCompatMultiAutoCompleteTextView	A `MultiAutoCompleteTextView` which supports compatible features on older version of the platform, including: Supports `textAllCaps` style attribute which works back to `Gingerbread`.
AppCompatRadioButton	A `RadioButton` which supports compatible features on older version of the platform, including: Allows dynamic tint of its background via the background tint methods in `CompoundButtonCompat`.
AppCompatRatingBar	A `RatingBar` which supports compatible features on older version of the platform.
AppCompatSeekBar	A `SeekBar` which supports compatible features on older version of the platform.
AppCompatSpinner	A `Spinner` which supports compatible features on older versions of the platform, including: Allows dynamic tint of its background via the background tint methods in `CompoundButtonCompat`.
AppCompatTextView	A `TextView` which supports compatible features on older version of the platform, including: Supports `textAllCaps` style attribute which works back to `Gingerbread`.
AppWidgetHostView	Provides the glue to show AppWidget views.
AutoCompleteTextView	An editable text view that shows completion suggestions automatically while the user is typing.
BaseCardView	A card style layout that responds to certain state changes.
BaseGridView	An abstract base class for vertically and horizontally scrolling lists.
BottomNavigationView	Represents a standard bottom navigation bar for application.
BoxInsetLayout	BoxInsetLayout is a screen shape-aware ViewGroup that can box its children in the center square of a round screen by using the `boxedEdges` attribute.
BrowseFrameLayout	A ViewGroup for managing focus behavior between overlapping views.
Button	A user interface element the user can tap or click to perform an action.
CalendarView	This class is a calendar widget for displaying and selecting dates.
CardView	A FrameLayout with a rounded corner background and shadow.
CheckBox	A checkbox is a specific type of two-states button that can be either checked or unchecked.
CheckedTextView	An extension to `TextView` that supports the `Checkable` interface and displays.
Chronometer	Class that implements a simple timer.
CollapsingToolbarLayout	CollapsingToolbarLayout is a wrapper for `Toolbar` which implements a collapsing app bar.
CompoundButton	A button with two states, checked and unchecked.
ContentLoadingProgressBar	ContentLoadingProgressBar implements a ProgressBar that waits a minimum time to be dismissed before showing.
CoordinatorLayout	CoordinatorLayout is a super-powered `FrameLayout`.
DatePicker	Provides a widget for selecting a date.
DialerFilter	This class was deprecated in API level O. Use a custom view or layout to handle this functionality instead
DigitalClock	This class was deprecated in API level 17. It is recommended you use `TextClock` instead.
DrawerLayout	DrawerLayout acts as a top-level container for window content that allows for interactive "drawer" views to be pulled out from one or both vertical edges of the window.
EditText	A user interface element for entering and modifying text.
EmojiAppCompatButton	AppCompatButton widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiAppCompatEditText	AppCompatEditText widget enhanced with emoji capability by using `EmojiEditTextHelper`.
EmojiAppCompatTextView	AppCompatTextView widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiButton	Button widget enhanced with emoji capability by using `EmojiTextViewHelper`.
EmojiEditText	EditText widget enhanced with emoji capability by using `EmojiEditTextHelper`.
EmojiTextView	TextView widget enhanced with emoji capability by using `EmojiTextViewHelper`.
ExpandableListView	A view that shows items in a vertically scrolling two-level list.
ExtractEditText	Specialization of `EditText` for showing and interacting with the extracted text in a full-screen input method.
FloatingActionButton	Floating action buttons are used for a special type of promoted action.
FragmentBreadCrumbs	This class was deprecated in API level 21. This widget is no longer supported.
FragmentTabHost	Version of `FragmentTabHost` that can be used with the platform `Fragment` APIs.
FrameLayout	FrameLayout is designed to block out an area on the screen to display a single item.
GLSurfaceView	An implementation of SurfaceView that uses the dedicated surface for displaying OpenGL rendering.
Gallery	This class was deprecated in API level 16. This widget is no longer supported. Other horizontally scrolling widgets include `HorizontalScrollView` and `ViewPager` from the support library.
GestureOverlayView	A transparent overlay for gesture input that can be placed on top of other widgets or contain other widgets.
GridLayout	A layout that places its children in a rectangular grid.
GridView	A view that shows items in two-dimensional scrolling grid.
GuidedActionEditText	A custom EditText that satisfies the IME key monitoring requirements of GuidedStepFragment.
HorizontalGridView	A `ViewGroup` that shows items in a horizontal scrolling list.
HorizontalScrollView	Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
ImageButton	Displays a button with an image (instead of text) that can be pressed or clicked by the user.
ImageCardView	A subclass of `BaseCardView` with an `ImageView` as its main region.
ImageSwitcher	`ViewSwitcher` that switches between two ImageViews when a new image is set on it.
ImageView	Displays image resources, for example `Bitmap` or `Drawable` resources.
KeyboardView	A view that renders a virtual `Keyboard`.
LinearLayout	A layout that arranges other views either horizontally in a single column or vertically in a single row.
LinearLayoutCompat	A Layout that arranges its children in a single column or a single row.
ListRowHoverCardView	ListRowHoverCardView contains a title and description.
ListRowView	ListRowView is a `ViewGroup` which always contains a `HorizontalGridView`, and may optionally include a hover card.
ListView	Displays a vertically-scrollable collection of views, where each view is positioned immediatelybelow the previous view in the list.
MediaController	A view containing controls for a MediaPlayer.
MediaRouteButton
MultiAutoCompleteTextView	An editable text view, extending `AutoCompleteTextView`, that can show completion suggestions for the substring of the text where the user is typing instead of necessarily for the entire thing.
NavigationView	Represents a standard navigation menu for application.
NestedScrollView	NestedScrollView is just like `ScrollView`, but it supports acting as both a nested scrolling parent and child on both new and old versions of Android.
NumberPicker	A widget that enables the user to select a number from a predefined range.
PagerTabStrip	PagerTabStrip is an interactive indicator of the current, next, and previous pages of a `ViewPager`.
PagerTitleStrip	PagerTitleStrip is a non-interactive indicator of the current, next, and previous pages of a `ViewPager`.
PercentFrameLayout	This class is deprecated. consider using ConstraintLayout and associated layouts instead. The following shows how to replicate the functionality of percentage layouts with a ConstraintLayout. The Guidelines are used to define each percentage break point, and then a Button view is stretched to fill the gap: <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/left_guideline" app:layout_constraintGuide_percent=".15" android:orientation="vertical"/> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/right_guideline" app:layout_constraintGuide_percent=".85" android:orientation="vertical"/> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/top_guideline" app:layout_constraintGuide_percent=".15" android:orientation="horizontal"/> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/bottom_guideline" app:layout_constraintGuide_percent=".85" android:orientation="horizontal"/> <Button android:text="Button" android:layout_width="0dp" android:layout_height="0dp" android:id="@+id/button" app:layout_constraintLeft_toLeftOf="@+id/left_guideline" app:layout_constraintRight_toRightOf="@+id/right_guideline" app:layout_constraintTop_toTopOf="@+id/top_guideline" app:layout_constraintBottom_toBottomOf="@+id/bottom_guideline" /> </android.support.constraint.ConstraintLayout>
PercentRelativeLayout	This class is deprecated. consider using ConstraintLayout and associated layouts instead. The following shows how to replicate the functionality of percentage layouts with a ConstraintLayout. The Guidelines are used to define each percentage break point, and then a Button view is stretched to fill the gap: <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/left_guideline" app:layout_constraintGuide_percent=".15" android:orientation="vertical"/> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/right_guideline" app:layout_constraintGuide_percent=".85" android:orientation="vertical"/> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/top_guideline" app:layout_constraintGuide_percent=".15" android:orientation="horizontal"/> <android.support.constraint.Guideline android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/bottom_guideline" app:layout_constraintGuide_percent=".85" android:orientation="horizontal"/> <Button android:text="Button" android:layout_width="0dp" android:layout_height="0dp" android:id="@+id/button" app:layout_constraintLeft_toLeftOf="@+id/left_guideline" app:layout_constraintRight_toRightOf="@+id/right_guideline" app:layout_constraintTop_toTopOf="@+id/top_guideline" app:layout_constraintBottom_toBottomOf="@+id/bottom_guideline" /> </android.support.constraint.ConstraintLayout>
Picker	Picker is a widget showing multiple customized `PickerColumn`s.
ProgressBar	A user interface element that indicates the progress of an operation.
QuickContactBadge	Widget used to show an image with the standard QuickContact badge and on-click behavior.
RadioButton	A radio button is a two-states button that can be either checked or unchecked.
RadioGroup	This class is used to create a multiple-exclusion scope for a set of radio buttons.
RatingBar	A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars.
RecyclerView	A flexible view for providing a limited window into a large data set.
RelativeLayout	A Layout where the positions of the children can be described in relation to each other or to the parent.
RowHeaderView	RowHeaderView is a header text view.
ScrollView	A view group that allows the view hierarchy placed within it to be scrolled.
SearchBar	A search widget containing a search orb and a text entry view.
SearchEditText	EditText widget that monitors keyboard changes.
SearchOrbView	A widget that draws a search affordance, represented by a round background and an icon.
SearchView	A widget that provides a user interface for the user to enter a search query and submit a request to a search provider.
SeekBar	A SeekBar is an extension of ProgressBar that adds a draggable thumb.
ShadowOverlayContainer	Provides an SDK version-independent wrapper to support shadows, color overlays, and rounded corners.
SlidingDrawer	This class was deprecated in API level 17. This class is not supported anymore. It is recommended you base your own implementation on the source code for the Android Open Source Project if you must use it in your application.
SlidingPaneLayout	SlidingPaneLayout provides a horizontal, multi-pane layout for use at the top level of a UI.
Space	Space is a lightweight View subclass that may be used to create gaps between components in general purpose layouts.
SpeechOrbView	A subclass of `SearchOrbView` that visualizes the state of an ongoing speech recognition.
Spinner	A view that displays one child at a time and lets the user pick among them.
StackView
SurfaceView	Provides a dedicated drawing surface embedded inside of a view hierarchy.
SwipeDismissFrameLayout	A layout enabling left-to-right swipe-to-dismiss, intended for use within an activity.
SwipeRefreshLayout	The SwipeRefreshLayout should be used whenever the user can refresh the contents of a view via a vertical swipe gesture.
Switch	A Switch is a two-state toggle switch widget that can select between two options.
SwitchCompat	SwitchCompat is a version of the Switch widget which on devices back to API v7.
TabHost	Container for a tabbed window view.
TabItem	TabItem is a special 'view' which allows you to declare tab items for a `TabLayout` within a layout.
TabLayout	TabLayout provides a horizontal layout to display tabs.
TabWidget	Displays a list of tab labels representing each page in the parent's tab collection.
TableLayout	A layout that arranges its children into rows and columns.
TableRow	A layout that arranges its children horizontally.
TextClock	`TextClock` can display the current date and/or time as a formatted string.
TextInputEditText	A special sub-class of `EditText` designed for use as a child of `TextInputLayout`.
TextInputLayout	Layout which wraps an `EditText` (or descendant) to show a floating label when the hint is hidden due to the user inputting text.
TextSwitcher	Specialized `ViewSwitcher` that contains only children of type `TextView`.
TextView	A user interface element that displays text to the user.
TextureView	A TextureView can be used to display a content stream.
TimePicker	A widget for selecting the time of day, in either 24-hour or AM/PM mode.
TitleView	Title view for a leanback fragment.
ToggleButton	Displays checked/unchecked states as a button with a "light" indicator and by default accompanied with the text "ON" or "OFF".
Toolbar	A standard toolbar for use within application content.
TvView	Displays TV contents.
TwoLineListItem	This class was deprecated in API level 17. This class can be implemented easily by apps using a `RelativeLayout` or a `LinearLayout`.
VerticalGridView	A `ViewGroup` that shows items in a vertically scrolling list.
VideoView	Displays a video file.
View	This class represents the basic building block for user interface components.
ViewAnimator	Base class for a `FrameLayout` container that will perform animations when switching between its views.
ViewFlipper	Simple `ViewAnimator` that will animate between two or more views that have been added to it.
ViewGroup	A `ViewGroup` is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers.
ViewPager	Layout manager that allows the user to flip left and right through pages of data.
ViewStub	A ViewStub is an invisible, zero-sized View that can be used to lazily inflate layout resources at runtime.
ViewSwitcher	`ViewAnimator` that switches between two views, and has a factory from which these views are created.
WearableActionDrawerView	Ease of use class for creating a Wearable action drawer.
WearableDrawerLayout	Top-level container that allows interactive drawers to be pulled from the top and bottom edge of the window.
WearableDrawerView	View that contains drawer content and a peeking view for use with `WearableDrawerLayout`.
WearableNavigationDrawerView	Ease of use class for creating a Wearable navigation drawer.
WearableRecyclerView	Wearable specific implementation of the `RecyclerView` enabling `setCircularScrollingGestureEnabled(boolean)` circular scrolling} and semi-circular layouts.
WebView	A View that displays web pages.
ZoomButton	This class was deprecated in API level O. Use other means to handle this functionality. This widget is merely a simple wrapper around a long-press handler.
ZoomControls	The `ZoomControls` class displays a simple set of controls used for zooming and provides callbacks to register for events.

This interface is implemented by classes source of AccessibilityEvents.

Developer Guides

For more information about making applications accessible, read the Accessibility developer guide.

Summary

Public methods
`abstract void`	`sendAccessibilityEvent(int eventType)` Handles the request for sending an `AccessibilityEvent` given the event type.
`abstract void`	`sendAccessibilityEventUnchecked(AccessibilityEvent event)` Handles the request for sending an `AccessibilityEvent`.

Public methods

sendAccessibilityEvent

added in API level 4

void sendAccessibilityEvent (int eventType)

Handles the request for sending an AccessibilityEvent given the event type. The method must first check if accessibility is on via calling AccessibilityManager.isEnabled(), obtain an AccessibilityEvent from the event pool through calling AccessibilityEvent.obtain(int), populate the event, and send it for dispatch via calling AccessibilityManager.sendAccessibilityEvent(AccessibilityEvent).

Parameters
`eventType`	`int`: The event type.

See also:

sendAccessibilityEventUnchecked

added in API level 4

void sendAccessibilityEventUnchecked (AccessibilityEvent event)

Handles the request for sending an AccessibilityEvent. The method does not guarantee to check if accessibility is on before sending the event for dispatch. It is responsibility of the caller to do the check via calling AccessibilityManager.isEnabled().

Parameters
`event`	`AccessibilityEvent`: The event.

See also:

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