getActionBar null !

[afaucogney]

I get an issue in CameraPreview class, when calling getActionBar, that is null. I have no ActionBar.
the "showActionBar()" method cares if the actionbar is null, but not the "showBack" method.

[leaf918]

I break it down.
modify like this,works well.
public abstract class BaseActivity extends AppCompatActivity

[Montsserrat]

In my case I just comment the showBack() method in BasePhotoActivity class