Accelerometer event handler doesn't respond after few triggers. WP8 - windows-phone-8

Question

I am building windows app for reading and displaying the x,y and z values on a text block.
The application works for few execution but stops responding after few changes.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using PhoneApp9.Resources;
using Microsoft.Devices.Sensors;
using Microsoft.Xna.Framework;
namespace PhoneApp9
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
public MainPage()
{
InitializeComponent();
Accelerometer acc = new Accelerometer();
acc.CurrentValueChanged +=acc_ReadingChanged;
try
{
acc.Start();
}
catch(Exception ex)
{
tbk.Text = ex.ToString();
}
}
private void acc_ReadingChanged(object sender, SensorReadingEventArgs<AccelerometerReading> e)
{
try
{
System.Threading.Thread.Sleep(1);
Dispatcher.BeginInvoke( () =>
{
tbk.Text = "X:" + e.SensorReading.Acceleration.X.ToString("0.00");
tbk.Text += "\nY:" + e.SensorReading.Acceleration.Y.ToString("0.00");
tbk.Text += "\nZ:" + e.SensorReading.Acceleration.Z.ToString("0.00");
});
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
//throw new NotImplementedException();
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
if (Accelerometer.IsSupported==true)
MessageBox.Show("exist");
else
MessageBox.Show("not exïst");
}
}
}
}
handler( ) stops executing after few trial. This is un predicted behavior.

Answer 1

Why do you use System.Threading.Thread.Sleep(1) ??
Dispatcher.BeginInvoke add an event to the UI eventloop. Maybe accelerometer update is faster than the ui event-loop execution. So the ui eventloop grow and your application is blocked after few seconds. You could try to add a boolean to control it.
bool displaySensorData = false;
private void acc_ReadingChanged(object sender, SensorReadingEventArgs<AccelerometerReading> e)
{
if(displaySensorData ) return;
try
{
displaySensorData = true;
Dispatcher.BeginInvoke( () =>
{
tbk.Text = "X:" + e.SensorReading.Acceleration.X.ToString("0.00");
tbk.Text += "\nY:" + e.SensorReading.Acceleration.Y.ToString("0.00");
tbk.Text += "\nZ:" + e.SensorReading.Acceleration.Z.ToString("0.00");
displaySensorData = false;
});
}
catch (Exception ex)
{
displaySensorData = false;
MessageBox.Show(ex.ToString());
}
//throw new NotImplementedException();
}