Android, Navigate Edition: MapView is not life cycle proof about here-sdk-examples HOT 1 CLOSED

Hi @SergeHelfrichPI, sorry for the late reply and thank you for your detailed question. With the steps listed, this is expected, in such a case you need to recreate the map view. Basically, this is what the error message is indicating.

@Override
protected void onPause() {
    mapView.onPause();
    super.onPause();
}

@Override
protected void onResume() {
    mapView.onResume();
    super.onResume();
}

@Override
protected void onDestroy() {
    mapView.onDestroy();
    disposeHERESDK();
    super.onDestroy();
}

@Override
protected void onSaveInstanceState(@NonNull Bundle outState) {
    mapView.onSaveInstanceState(outState);
    super.onSaveInstanceState(outState);
}

When you call mapView.onSaveInstanceState(outState) then all map items that are added to the map, like markers, polylines and so on, will be kept based on the bundled state - even if the screen orientation changes. However, if instead you want to create a new map view instance for each orientation change, then make sure to reinitialize the HERE SDK and call mapView.onCreate(null) - a new HERE SDK instance or likewise a new MapView instance cannot be used together with a bundled state that was created based on previous instances.

If this answer is not sufficient, please leave a reply. Thank you!

UDPDATE: Here is a little bit more background info. In the example app, the HERE SDK is destroyed since there is only a single activity. In a more complex app it is also possible, to keep the HERE SDK alive and only destroy it when the app itself is terminated. Then, when an orientation change occurs, it does not need to be recreated. For example, an application can check if the saved bundle is not null, and thus do not recreate the SDK. This way, the stored map view instance can be reused. On the other hand - when the SDK should be also reinitialized, then also the map view instance needs to be recreated and thus, calling mapView.onCreate(null) is needed. The map view instance can only be reused by the same SDK instance. If the SDK instance changes, then also the map view instance needs to be recreated.

from here-sdk-examples.