question: private String generateScreenOnOrOffUtternace ( int feedbackIndex ) { int resourceId = ( feedbackIndex == INDEX_SCREEN_ON ) ? R . string . template_screen_on : R . string . template_screen_off ; String template = mContext . getString ( resourceId ) ; int currentRingerVolume = mAudioManager . getStreamVolume ( AudioManager . STREAM_RING ) ; int maxRingerVolume = mAudioManager . getStreamMaxVolume ( AudioManager . STREAM_RING ) ; int volumePercent = ( 100 / maxRingerVolume ) * currentRingerVolume ; int adjustment = volumePercent % 10 ; if ( adjustment < 5 ) { volumePercent -= adjustment ; } else if ( adjustment > 5 ) { volumePercent += ( 10 - adjustment ) ; } return String . format ( template , volumePercent ) ; }
target:  Generates an utterance for announcing screen on and screen off.