In general, you should send an AccessibilityEvent whenever the content of your custom view changes. For example, if you are implementing a custom slider bar that allows a user to select a numeric value by pressing the left or right arrows, your custom view should emit an event of type TYPE_VIEW_TEXT_CHANGED whenever the slider value changes. Which one of the following sample codes demonstrates the use of the sendAccessibilityEvent() method to report this event.

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William Takashi Chan · Accepted Answer

override fun onKeyUp(keyCode: Int, event: KeyEvent): Boolean { return when(keyCode) {KeyEvent.KEYCODE_DPAD_LEFT -> { currentValue--sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED) true}

William Takashi Chan · Answer

override fun dispatchPopulateAccessibilityEvent(event: AccessibilityEvent): Boolean { return super.dispatchPopulateAccessibilityEvent(event).let{ completed -> if (text?.isNotEmpty() == true) { event.text.add(text) true } else { completed}}}

William Takashi Chan · Answer

.}}

William Takashi Chan · Answer

override fun onKeyUp(keyCode: Int, event: KeyEvent): Boolean { return when(keyCode) {KeyEvent.KEYCODE_ENTER -> { currentValue--sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED) true}

William Takashi Chan · Answer

.}}

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