appcore_set_rotation_cb(rotate, ad);
appcore_set_event_callback(APPCORE_EVENT_LOW_MEMORY, low_memory, ad);
appcore_set_event_callback(APPCORE_EVENT_LOW_BATTERY, low_battery, ad);
appcore_set_event_callback(APPCORE_EVENT_LANG_CHANGE, lang_changed, ad);
appcore_set_rotation_cb(rotate, ad);
appcore_set_event_callback(APPCORE_EVENT_LOW_MEMORY, low_memory, ad);
appcore_set_event_callback(APPCORE_EVENT_LOW_BATTERY, low_battery, ad);
appcore_set_event_callback(APPCORE_EVENT_LANG_CHANGE, lang_changed, ad);