Google Exam Associate-Android-Developer Topic 4 Question 4 Discussion

Actual exam question for Google's Associate-Android-Developer exam

Question #: 4
Topic #: 4

[All Associate-Android-Developer Questions]

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.

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

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

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

Show Suggested Answer

Suggested Answer: B

by Carlee at May 04, 2022, 01:07 PM

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