Google Exam Associate-Android-Developer Topic 10 Question 39 Discussion

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

Question #: 39
Topic #: 10

[All Associate-Android-Developer Questions]

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?

AmTimerViewModel.getTimer().getValue().toString().observe(new Observer<Long>() {
@Override
public void onChanged(Long aLong) {
callAnyChangeUIMethodHere(aLong)
}
});

BmTimerViewModel.getTimer().observe(this, new Observer<Long>() {
@Override
public void onChanged(Long aLong) {
callAnyChangeUIMethodHere(aLong)
}
});

CmTimerViewModel.observe(new Observer<Long>() {
@Override
public void onChanged(Long aLong) {
callAnyChangeUIMethodHere(aLong)
}
});

Show Suggested Answer

Suggested Answer: C

https://developer.android.com/guide/topics/ui/menus

by Trinidad at Feb 07, 2023, 01:12 PM

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