CODEWITHSUNDEEP
androidandroid-livedataandroid-architecture-componentsandroid-savedstate
Elye
Elye

Reputation: 60081

ViewModel SavedStateHandler.get for LiveData can't set default value as per the document?

In referring to https://developer.android.com/reference/androidx/lifecycle/SavedStateHandle#getLiveData(java.lang.String,%20T)

The sample codes in Java as below.

 String defaultValue = ...; // nullable
 LiveData<String> liveData;
 if (defaultValue != null) {
     liveData = savedStateHandle.get(KEY, defaultValue);
 } else {
     liveData = savedStateHandle.get(KEY);
 }

However, I notice that when tried to compile the code, the statement below is not compilable.

savedStateHandle.get(KEY, defaultValue);

It error out stating

get(String) in SavedStateHandle cannot be applied to (String, java.lang.String).

I trace into the code, and seems like savedStatehandle doesn't have a get that takes in a default value. Did I miss anything?

Upvotes: 1

Views: 970

Answers (1)

Elye
Elye

Reputation: 60081

Apparently the Google Document has typo. It supposed to be

 String defaultValue = ...; // nullable
 LiveData<String> liveData;
 if (defaultValue != null) {
     liveData = savedStateHandle.getLiveData(KEY, defaultValue);
 } else {
     liveData = savedStateHandle.getLiveData(KEY);
 }

i.e. getLiveData instead of just get.

Upvotes: 1

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