Download Associate Android Developer.Associate-Android-Developer.VCEplus.2021-06-21.107q.vcex

Vendor:	Google
Exam Code:	Associate-Android-Developer
Exam Name:	Associate Android Developer
Date:	Jun 21, 2021
File Size:	2 MB

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Demo Questions

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 ...

Correct answer: 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

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

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);
...

Correct answer: A

Explanation:

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

Reference:

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

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)

Correct answer: 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

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

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
        }
        ...
    }
}

Correct answer: B

Explanation:

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

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) }

Correct answer: A

Explanation:

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

Android Tests. You can use the childSelector() method to nest multiple UiSelector instances. For example, the following code example shows how your test might specify a search to find the first ListView in the currently displayed UI, then search within that ListView to find a UI element with the text property Apps. What is the correct sample?

val appItem: UiObject = device.findObject(
        UiSelector().className(ListView.class)
                .instance(1)
                .childSelector(
                        UiSelector().text("Apps")
                )
)
val appItem: UiObject = device.findObject(
        UiSelector().className("android.widget.ListView")
                .instance(0)
                .childSelector(
                        UiSelector().text("Apps")
                )
)
val appItem: UiObject = device.findObject(
        UiSelector().className("android.widget.ListView")
                .instance(
                        UiSelector().text("Apps")
                )
)

Correct answer: B

The following code snippet shows an example of an Espresso test:

@Rule fun
greeterSaysHello() {
    onView(withId(R.id.name_field)).do(typeText("Steve"))
onView(withId(R.id.greet_button)).do(click())
    onView(withText("Hello Steve!")).check(matches(isDisplayed()))
}
@Test fun
greeterSaysHello() {
    onView(withId(R.id.name_field)).perform(typeText("Steve"))
onView(withId(R.id.greet_button)).perform(click())
    onView(withText("Hello Steve!")).check(matches(isDisplayed()))
}
@Test fun
greeterSaysHello() {
    onView(withId(R.id.name_field)).do(typeText("Steve"))
onView(withId(R.id.greet_button)).do(click())
    onView(withText("Hello Steve!")).compare(matches(isDisplayed()))
}

Correct answer: B

As an example. In an Activity we have our TimerViewModel object (extended ViewModel), named mTimerViewModel. mTimerViewModel.timer method returns a LiveData<Long> value. What can be a correct way to set an observer to change UI in case if data was changed?

mTimerViewModel!!.timer.value.toString().observe
(Observer { aLong -> callAnyChangeUIMethodHere(aLong!!) })
mTimerViewModel!!.timer.observe
(this, Observer { aLong -> callAnyChangeUIMethodHere(aLong!!) })
mTimerViewModel.observe
(Observer { aLong -> callAnyChangeUIMethodHere(aLong!!) })

Correct answer: B

LiveData.postValue() and LiveData.setValue() methods have some differences. So if you have a following code executed in the main thread:

liveData.postValue("a");

liveData.setValue("b");

What will be the correct statement?

The value "b" would be set at first and later the main thread would override it with the value "a".
The value "a" would be set at first and later the main thread would override it with the value "b".
The value "b" would be set at first and would not be overridden with the value "a".
The value "a" would be set at first and would not be overridden with the value "b".

Correct answer: B

In our TeaViewModel class, that extends ViewModel, we have such prorerty:

val tea: LiveData<Tea>

An observer in our Activity (type of mViewModel variable in example is TeaViewModel) is set in this way:

mViewModel!!.tea.observe(this, Observer { tea: Tea? -> displayTea(tea) })

What will be a correct displayTea method definition?

private fun displayTea()
private fun displayTea(tea: Tea?)
private fun displayTea(tea: LiveData?<Tea>)
private fun displayTea(tea: LiveData?<T>)

Correct answer: B

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