How do I fulfill the Google Play criteria?

[cseroapps]

[Q]Design your app for tablets

In Google Play one of my apps gets this warning in optimizing tips:

Your layout should make use of the available space on tablets

But I don't used layouts.
What must be done to fulfill the Google Play criteria?

 

[srkmagnus]

Re: [Q]Design your app for tablets

In Google Play one of my apps gets this warning in optimizing tips:

But I don't used layouts.
What must be done to fulfill the Google Play criteria?

It looks like it's a requirement to have your app adjust to fulfill the screen of a tablet, which in most cases is larger than a mobile phone. Does the app adjust/scale accordingly to make the best of the available space for a tablet?

 

[cseroapps]

Re: [Q]Design your app for tablets

No, but it seems the problem is not related to this.
If I set the landscape orientation in my manifest, then everything is OK. And when I set the portrait orientation, it becomes a warning.