ESRI documentation describes how to use onRetainNonConfigurationInstance for handling map rotation so that the scale, centre and layer state of the map is saved when onCreate is called (e.g http://help.arcgis.com/en/arcgismobile/10.0/apis/android/help/#/My_first_application/011900000005000000/)
While this works fine I would like my application to remember map setting not only when the phone is rotated, but also when the user closes and re-enters the application. For this to work I save the map state values to the PreferenceManager like this when app is paused:
@Override
protected void onPause() {
super.onPause();
SharedPreferences settings = getSharedPreferences("mapPreference", 0);
SharedPreferences.Editor ed = settings.edit();
ed.putString("mapstate", map.retainState());
ed.commit();
}
And then retrieve the map settings in the onCreate method: @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// get the map settings
SharedPreferences settings = getSharedPreferences("mapPreference", 0);
String mapState = settings.getString("mapstate", null);
if (mapState != null){
map.restoreState(mapState);
}
