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Android

Posted by ronw
ronw
7,894 Points

Fun Facts app reverts to first screen when the device orientation changes.

I'm going through the "Build a Simple Android App" course. I have finished building the 'Fun Facts' app. I am debugging the app on my tablet.

Whenever I change the orientation of the tablet (from portrait to landscape or vice versa) the app reverts to the first screen (the first fun fact).

UPDATE: I realize the onCreate() method of the FunFactsActivity class is getting called each time the device orientation changes.

What causes this?

Coinnich c
Coinnich c
7,512 Points

Hello Ron,

I believe this is because of the Android systems lifecycle. When an orientation is changed the app will have to rebuild itself. Typically applications will be designed to handle this change, but in this course the Fun Facts app wasn't designed to. In fact if memory serves we went to the manifest and made our application only support the portrait orientation. I haven't yet finished the Android track, so am unsure if there are any courses which discuss this. However this link

Activity lifecycle on Orientation Change

Helps explain it.

Hope this helps.