How to keep map state on device rotation?

Question

I have a nested fragment that i would like to maintain the state when the device orientation changed.

It is something like this:

I'm instantiate a mapView in the nested fragment and when the device is rotated the user must be in the same place where it was. How can I accomplish this?

Thank you

Answer 1

Ok, so i was making a mistake. I was calling the function setRetainInstance(true) on the fragment parent and i shouldn't.

After deleting that line, it was very simple to keep the map state on device orientation. All i had to do was to save some values on onSaveInstanceState like this:

bundle.putDouble("lat", mMap.getCameraPosition().target.latitude);
bundle.putDouble("lon", mMap.getCameraPosition().target.longitude);
bundle.putFloat("zoom", mMap.getCameraPosition().zoom);

Then on onCreate, i restore the map state like this:

bundle.getDouble("lat");
bundle.getDouble("lon");
bundle.getDouble("zoom");