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Google Developers Certification - Associate Android Developer (Kotlin and Java Exam) Associate-Android-Developer Question # 34 Topic 4 Discussion

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Google Developers Certification - Associate Android Developer (Kotlin and Java Exam) Associate-Android-Developer Question # 34 Topic 4 Discussion

Associate-Android-Developer Exam Topic 4 Question 34 Discussion:
Question #: 34
Topic #: 4

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

mTimerViewModel.getTimer().getValue().toString().observe(new Observer() {

@Override

public void onChanged(Long aLong) {

callAnyChangeUIMethodHere(aLong)

}

});

B.

mTimerViewModel.getTimer().observe(this, new Observer() {

@Override

public void onChanged(Long aLong) {

callAnyChangeUIMethodHere(aLong)

}

});

C.

mTimerViewModel.observe(new Observer() {

@Override

public void onChanged(Long aLong) {

callAnyChangeUIMethodHere(aLong)

}

});

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Actual exam question for Google Associate-Android-Developer exam by Knox12208 at Aug 3, 2025, 12:00:00 AM

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