Didn't find class “androidx.core.app.CoreComponentFactory”

Question

I don\'t know what to do about the following errors, I\'ve searched the web but not found anything:

java.lang.ClassNotFoundException: Didn\'t find class \"an         


        

Answer 1

It may sound totally unrelated, but I have seen this problem also when by mistake I have overridden wrong on Activity#onCreate() method i.e.

public void onCreate(@Nullable Bundle savedInstanceState,
        @Nullable PersistableBundle persistentState)

Instead of

protected void onCreate(@Nullable Bundle savedInstanceState)

So, please check that also. The second one is the one that you probably need.

Please refer to the documentations for the details of these two methods.