proximitysensor - Android proximity sensor when uncoverd -

i work in project use proximity sensor program should mute phone when proximity sensor covered , restore normal when sensor uncovered. managed code when sensor covered don't know value far when sensor uncovered need code unmute when sensor uncovered.

@override public void onsensorchanged(sensorevent event) {      audio.setringermode(audiomanager.ringer_mode_silent);  } 

public void onsensorchanged(sensorevent event) {    // todo auto-generated method stub     if(event.sensor.gettype()==sensor.type_proximity){        if(event.values[0]<5){ audio.setringermode(audiomanager.ringer_mode_youwant);}else{ audio.setringermode(audiomanager.ringer_mode_silent);}    }   }