question: @ SuppressWarnings ( "unchecked" ) @ Override public void onRestoreInstanceState ( Parcelable state ) { if ( state instanceof Bundle ) { Bundle bundle = ( Bundle ) state ; AutoLabelUISettings autoLabelUISettings = bundle . getParcelable ( KEY_INSTANCE_STATE_SETTINGS ) ; if ( autoLabelUISettings != null ) { setSettings ( autoLabelUISettings ) ; } resetLabelsCounter ( ) ; List < LabelValues > labelsAdded = ( List < LabelValues > ) bundle . getSerializable ( KEY_INSTANCE_STATE_LABELS ) ; if ( labelsAdded != null ) { for ( int i = 0 ; i < labelsAdded . size ( ) ; i ++ ) { LabelValues labelValues = labelsAdded . get ( i ) ; if ( labelValues . getKey ( ) == - 1 ) { addLabel ( labelValues . getValue ( ) ) ; } else { addLabel ( labelValues . getValue ( ) , labelValues . getKey ( ) ) ; } } } state = bundle . getParcelable ( KEY_INSTANCE_STATE_GENERAL ) ; } super . onRestoreInstanceState ( state ) ; }
target:  Retrieve the state of the labels when orientation screen changed.