android震动和提示音的实现代码

public class VibratorUtil {
  protected AudioManager audioManager;
  protected Vibrator vibrator;
  private Ringtone ringtone;
  private static final int MIN_TIME_OUT = 4000; //时间间隔
  long lastNotificationTime;
  public VibratorUtil() {
    audioManager = (AudioManager) MyApp.getContext().getSystemService(Context.AUDIO_SERVICE); //此方法是由Context调用的
    vibrator = (Vibrator) MyApp.getContext().getSystemService(Context.VIBRATOR_SERVICE); //同上
  }
  /**
   * 开启手机震动和播放系统提示铃声
   */
  public void vibrateAndPlayTone() {
    if (System.currentTimeMillis() - lastNotificationTime