AppCompatActivity.onCreate can only be called from within the same library group

As previous responses highlighted, it is bug. I recommend not to disable the specific lint warning project-wide, but for that method only. Annotate your method as follows:

@SuppressLint("RestrictedApi")
@Override
public void setupDialog(Dialog dialog, int style) {
    super.setupDialog(dialog, style);
    //your code here
}