When the onClickRetrieveTitles is clicked, the code crashes in the AppCompatViewInflater.java file, throwing the "Could not execute the non-public method for android:onClick". As there is no "onClick" method for any call in the chapter there is no documentation on how to debug this. The onClickRetrieveTitles method has already been called before this error is thrown.
The onClickRetrieveTitles method is public as is the onClickAddTitle:
public void onClickRetrieveTitles (View view )
I have tried the code download and it fails the same.