Accelerometer.txt

//permission
	<uses-permission android:name="android.permission.VIBRATE" />
//ui
   <TextView
        android:id="@+id/accelerometer_text"
        android:layout_width="fill_parent"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_height="wrap_content"
        android:text="TEXT"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:layout_marginTop="30dp" />

//code

      [Activity(Label = "Sensors", MainLauncher = true, Icon = "@drawable/icon", ScreenOrientation = ScreenOrientation.Portrait)]
    public class MainActivity : Activity, ISensorEventListener
    {
        static readonly object _syncLock = new object();
        SensorManager _sensorManager;
        TextView _sensorTextView;
        float last_x=0;
        float last_y=0;
        float last_z=0;
        long last_Time=0;
        float ThreadShould = 3000; //mini speed
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);

            _sensorManager = (SensorManager)GetSystemService(Context.SensorService);
            _sensorTextView = FindViewById<TextView>(Resource.Id.accelerometer_text);
        }

        protected override void OnResume()
        {
            base.OnResume();
            _sensorManager.RegisterListener(this,
                                            _sensorManager.GetDefaultSensor(SensorType.Accelerometer),
                                            SensorDelay.Ui);
        }
        protected override void OnPause()
        {
            base.OnPause();
            _sensorManager.UnregisterListener(this);
        }
        public void OnAccuracyChanged(Sensor sensor, SensorStatus accuracy)
        {
            // We don't want to do anything here.
        }

        public void OnSensorChanged(SensorEvent e)
        {
            lock (_syncLock)
            {
                float  x= e.Values[0];
                float  y= e.Values[1];
                float  z= e.Values[2];
                long  Current_Time= DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond; ;
                if((Current_Time-last_Time)>100)
                {
                    long different = Current_Time - last_Time;
                    last_Time = Current_Time;
                    float speed = Math.Abs((x + y + z) - (last_x + last_y + last_z)) / different * 10000;
                    if (speed > ThreadShould)
                    {
                        _sensorTextView.Text = string.Format("newShouck={0:f}",speed);
                        Vibrator vibrator = (Vibrator) GetSystemService(Context.VibratorService);
                        vibrator.Vibrate(100);
                    }
                    last_x = x;
                    last_y = y;
                    last_z = z;
                }
               
            }
        }

    }