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?
A) The value "b" would be set at first and later the main thread would override it with the value "a".
B) The value "a" would be set at first and later the main thread would override it with the value "b".
C) The value "b" would be set at first and would not be overridden with the value "a".
D) The value "a" would be set at first and would not be overridden with the value "b".

Question

Quizplus · Accepted Answer

postValue() method is used to update the LiveData value asynchronously from a background thread, while setValue() method is used to update the LiveData value synchronously from the main thread. In the given code, liveData.postValue("a") is executed first, which updates the LiveData value asynchronously from a background thread. Then, liveData.setValue("b") is executed, which updates the LiveData value synchronously from the main thread. Therefore, the value "a" would be set at first and later the main thread would override it with the value "b".

LiveDataPostValue() and LiveData