Typeĭoes this view want to "claim" touch responsiveness? This is called for every touch move on the View when it is not the responder. When accessible is true, the system will invoke this function when the user performs the magic tap gesture. If that property is enabled, this View will be rendered off-screen once, saved in a hardware texture, and then composited onto the screen with an alpha each frame without having to switch rendering targets on the GPU. it doesn't need to be redrawn each frame). If you do need to enable this property for an animation, consider combining it with renderToHardwareTextureAndroid if the view contents are static (i.e. Rendering offscreen to preserve correct alpha behavior is extremely expensive and hard to debug for non-native developers, which is why it is not turned on by default. multiple overlapping Views, or text and a background). This default may be noticeable and undesired in the case where the View you are setting an opacity on has multiple overlapping elements (e.g. The default ( false) falls back to drawing the component and its children with an alpha applied to the paint used to draw each element instead of rendering the full component offscreen and compositing it back with an alpha value. Whether this View needs to rendered offscreen and composited with an alpha in order to preserve 100% correct colors and blending behavior. This disables the 'layout-only view removal' optimization for this view! Type Used to locate this view from native classes. TypeĮnum('auto', 'yes', 'no', 'no-hide-descendants') See the Android importantForAccessibility docs for reference. 'no-hide-descendants' - The view is not important for accessibility, nor are any of its descendant views.'no' - The view is not important for accessibility.'yes' - The view is important for accessibility.'auto' - The system determines whether the view is important for accessibility - default (recommended).Object: Ĭontrols how view is important for accessibility which is if it fires accessibility events and if it is reported to accessibility services that query the screen. See the Accessibility guide for more information. 'toolbar' - Used to represent a tool bar (a container of action buttons or components).ĭescribes the current state of a component to the user of an assistive technology.'tablist' - Used to represent a list of tabs.'switch' - Used to represent a switch which can be turned on and off.'spinbutton' - Used to represent a button which opens a list of choices.'scrollbar' - Used to represent a scroll bar.'radiogroup' - Used to represent a group of radio buttons.'radio' - Used to represent a radio button.'progressbar' - Used to represent a component which indicates progress of a task.'menuitem' - Used to represent an item within a menu.'menubar' - Used when a component is a container of multiple menus.'menu' - Used when the component is a menu of choices.'combobox' - Used when an element represents a combo box, which allows the user to select among several choices.'checkbox' - Used when an element represents a checkbox which can be checked, unchecked, or have mixed checked state.'alert' - Used when an element contains important text to be presented to the user.'summary' - Used when an element can be used to provide a quick summary of current conditions in the app when the app first launches.'header' - Used when an element acts as a header for a content section (e.g.'imagebutton' - Used when the element should be treated as a button and is also an image.'adjustable' - Used when an element can be "adjusted" (e.g.'text' - Used when the element should be treated as static text that cannot change.'keyboardkey' - Used when the element acts as a keyboard key. Can be combined with button or link, for example. 'image' - Used when the element should be treated as an image.'search' - Used when the text field element should also be treated as a search field.'link' - Used when the element should be treated as a link.'button' - Used when the element should be treated as a button.'none' - Used when the element has no role.TypeĪccessibilityRole communicates the purpose of a component to the user of an assistive technology.ĪccessibilityRole can be one of the following: 'assertive' - Accessibility services should interrupt ongoing speech to immediately announce changes to this view.'polite'- Accessibility services should announce changes to this view.'none' - Accessibility services should not announce changes to this view.Indicates to accessibility services whether the user should be notified when this view changes.
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