Associate-Android-Developer Google Developers Certification - Associate Android Developer (Kotlin and Java Exam) Questions and Answers

The HAL provides standard interfaces that expose device hardware capabilities to the higher-level Java API framework.

The HAL function both as apps for users and to provide key capabilities that developers can access from their own app. For example, if your app would like to deliver an SMS message, you don't need to build that functionality yourself – you can instead invoke whichever SMS app is already installed to deliver a message to the recipient you specify

The HAL consists of multiple library modules, each of which implements an interface for a specific type of hardware component, such as the camera or bluetooth module. When a framework API makes a call to access device hardware, the Android system loads the library module for that hardware component.

Using a HAL, not using a Linux kernel, allows Android to take advantage of key security features and allows device manufacturers to develop hardware drivers for a well-known kernel.

You must return true for the menu to be displayed; if you return false it will not be shown.

You must return false for the menu to be displayed; if you return true it will not be shown.

You can return any value: the menu will be displayed anyway.

private void displayTea()

private void displayTea(Tea tea)

private void displayTea(LiveData)

private void displayTea(LiveData)

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".

workManager.enqueue(new OneTimeWorkRequest.Builder(FooWorker.class).build());

WorkRequest request = new OneTimeWorkRequest.Builder(FooWorker.class).build(); workManager.enqueue(request);

LiveData status = workManager.getWorkInfoByIdLiveData(request.getId ());

status.observe(...);

WorkRequest request = new OneTimeWorkRequest.Builder(FooWorker.class).build(); workManager.enqueue(request);

workManager.cancelWorkById(request.getId());

WorkRequest request1 = new OneTimeWorkRequest.Builder(FooWorker.class).build();

WorkRequest request2 = new OneTimeWorkRequest.Builder(BarWorker.class).build

();

WorkRequest request3 = new OneTimeWorkRequest.Builder(BazWorker.class).build

();

workManager.beginWith(request1, request2).then(request3).enqueue();

WorkRequest request = new OneTimeWorkRequest.Builder(FooWorker.class).build(); workManager.enqueue(request);

workManager.cancelWork(request);

@Override

public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {

boolean completed = super.dispatchPopulateAccessibilityEvent(event);

CharSequence text = getText();

if (!TextUtils.isEmpty(text)) {

event.getText().add(text);

return true;

}

return completed;

}

@Override

public boolean onKeyUp (int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) {

currentValue--;

sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);

return true;

}

...

}

@Override

public boolean onKeyUp (int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_ENTER) {

currentValue--;

sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED);

return true;

}

...

}

KEYCODE_DPAD_CENTER

KEYCODE_BUTTON_START

KEYCODE_CALL

KEYCODE_BUTTON_SELECT

click() : Clicks the center of the visible bounds of the UI element.

touch() : Touch the center of the visible bounds of the UI element.

dragTo() : Drags this object to arbitrary coordinates.

moveTo() : Move this object to arbitrary coordinates.

setText() : Sets the text in an editable field, after clearing the field's content. Conversely, the

clearTextField() method clears the existing text in an editable field.

swipeUp() : Performs the swipe up action on the UiObject. Similarly, the swipeDown(), swipeLeft(), and swipeRight() methods perform corresponding actions.

a runtime error occurs instead of a compilation failure.

a compilation error occurs instead of a runtime failure.

both compilation error and runtime failure occurs.

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)

}

Display the messages produced by the app code only (the default). Logcat filters the log messages using the PID of the active app.

Apply no filters. Logcat displays all log messages from the device, regardless of which process you selected.

Create or modify a custom filter. For example, you could create a filter to view log messages from two apps at the same time.

commit()

apply()

commit() or apply()

examine the object tree for a variable, expand it in the Variables view. If the Variables view is not visible

evaluate an expression at the current execution point

advance to the next line in the code (without entering a method)

advance to the first line inside a method call

advance to the next line outside the current method

continue running the app normally

onCreateLayoutManager

onCreatePreferences

onCreateRecyclerView

onCreateView

val input = context!!.openRawResource(R.raw.sample_teas)

val input = context!!.getRawResource(R.raw.sample_teas)

val input = context!!.resources.openRawResource(R.raw.sample_teas)

validate your app's behavior one class at a time.

validate either interactions between levels of the stack within a module, or interactions between related modules.

validate user journeys spanning multiple modules of your app.