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QUESTION: 1 Topic: KOTLIN only

What is a correct part of an Implicit Intent for sharing data implementation?

val sendIntent = Intent(this, UploadService::class.java).apply {
putExtra(Intent.EXTRA_TEXT, textMessage)
...
val sendIntent = Intent().apply {
type = Intent.ACTION_SEND;
...
val sendIntent = Intent(this, UploadService::class.java).apply {
data = Uri.parse(fileUrl)
...
val sendIntent = Intent().apply {
action = Intent.ACTION_SEND
...

Answer(s): D

Explanation:

Create the text message with a string
val sendIntent = Intent().apply {
action = Intent.ACTION_SEND
putExtra(Intent.EXTRA_TEXT, textMessage)
type = "text/plain"
}

Reference:

https://developer.android.com/guide/components/fundamentals

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QUESTION: 2 Topic: KOTLIN only

By default, the notification's text content is truncated to fit one line. If you want your notification to be longer, for example, to create a larger text area, you can do it in this way:

var builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setContentText("Much longer text that cannot fit one line...")
.setStyle(NotificationCompat.BigTextStyle()
.bigText("Much longer text that cannot fit one line..."))
...
var builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setContentText("Much longer text that cannot fit one line...")
.setLongText("Much longer text that cannot fit one line..."))

...
var builder = NotificationCompat.Builder(this, CHANNEL_ID)
.setContentText("Much longer text that cannot fit one line...")
.setTheme(android.R.style.Theme_LongText);
...

Answer(s): A

Reference:

https://developer.android.com/training/notify-user/build-notification

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QUESTION: 3 Topic: KOTLIN only

Select correct demonstration of WorkRequest cancellation.

workManager.enqueue(OneTimeWorkRequest.Builder(FooWorker::class.java).build())
val request: WorkRequest = OneTimeWorkRequest.Builder(FooWorker::class.java).build()
workManager.enqueue(request)
val status = workManager.getWorkInfoByIdLiveData(request.id)
status.observe(...)
val request: WorkRequest = OneTimeWorkRequest.Builder(FooWorker::class.java).build()
workManager.enqueue(request)
workManager.cancelWorkById(request.id)
val request1: WorkRequest = OneTimeWorkRequest.Builder(FooWorker::class.java).build()
val request2: WorkRequest = OneTimeWorkRequest.Builder(BarWorker::class.java).build()
val request3: WorkRequest = OneTimeWorkRequest.Builder(BazWorker::class.java).build()
workManager.beginWith(request1, request2).then(request3).enqueue()
val request: WorkRequest = OneTimeWorkRequest.Builder(FooWorker::class.java).build()
workManager.enqueue(request)
workManager.cancelWork(request)

Answer(s): C

Explanation:

Videos:
-Working with WorkManager, from the 2018 Android Dev Summit
-WorkManager: Beyond the basics, from the 2019 Android Dev Summit

Reference:

https://developer.android.com/reference/androidx/work/WorkManager?hl=en

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QUESTION: 4 Topic: KOTLIN only

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.

override fun dispatchPopulateAccessibilityEvent(event: AccessibilityEvent): Boolean {
return super.dispatchPopulateAccessibilityEvent(event).let { completed ->
if (text?.isNotEmpty() == true) {
event.text.add(text)
true
} else {
completed
}
}
}
override fun onKeyUp(keyCode: Int, event: KeyEvent): Boolean {
return when(keyCode) {
KeyEvent.KEYCODE_DPAD_LEFT -> {
currentValue--
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED)
true
}
...
}
}
override fun onKeyUp(keyCode: Int, event: KeyEvent): Boolean {
return when(keyCode) {
KeyEvent.KEYCODE_ENTER -> {
currentValue--
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED)
true
}
...
}
}

Answer(s): B

Reference:

https://developer.android.com/guide/topics/ui/accessibility/custom-views

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QUESTION: 5 Topic: KOTLIN only

The easiest way of adding menu items (to specify the options menu for an activity) is inflating an XML file into the Menu via MenuInflater. With menu_main.xml we can do it in this way:

override fun onCreateOptionsMenu(menu: Menu): Boolean {
menuInflater.inflate(R.menu.menu_main, menu)
return true
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
menuInflater.inflate(R.menu.menu_main, menu)
return super.onOptionsItemSelected(item)
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.menu.menu_main)
}

Answer(s): A

Reference:

https://developer.android.com/guide/topics/ui/accessibility/custom-views

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