Basic example of using the accelerometer in Appcelerator's Titanium Mobile.

app.js

// Create tab group
var tabGroup = Titanium.UI.createTabGroup({
  barColor: "black"
});

// Create home tab.
var win = Ti.UI.createWindow({
  title: "Record"
});
// Tab for the recording pane.
var recTab = Titanium.UI.createTab({  
  window: win,
  title: "Record"
});

// Now add the main (and only) windows ui.
var isRecording = false, // Are we sampling data?
    recordings = []; // Holds all the recordings.

//=== Start/Stop Button ===//
var control = Ti.UI.createButton({
  title: "Start",
  top: 20,
  right: 40,
  left: 40,
  height: 34
});

win.add(control);

var email = Ti.UI.createButton({
  title: "Send Email",
  bottom: 20,
  right: 40,
  left: 40,
  height: 34
});

win.add(email);

//=== Now the X/Y/Z/Timestamp labels ===//
var x = Titanium.UI.createLabel({
  text: 'x:',
  top: 74,
  left: 10,
  font: {fontSize:14},
  color: '#555',
  width: 300,
  height: 'auto'
});
win.add(x);

var y = Titanium.UI.createLabel({
  text: 'y:',
  top: 94,
  left: 10,
  font: {fontSize:14},
  color: '#555',
  width: 300,
  height: 'auto'
});
win.add(y);

var z = Titanium.UI.createLabel({
  text: 'z:',
  top: 104,
  left: 10,
  font: {fontSize:14},
  color: '#555',
  width: 300,
  height: 'auto'
});
win.add(z);

var ts = Titanium.UI.createLabel({
  text: 'timestamp:',
  top: 124,
  left: 10,
  font: {fontSize:14},
  color: '#555',
  width: 300,
  height: 'auto'
});
win.add(ts);

// Handle a sample.
var didSample = function (e) {
  // Update the UI.
  ts.text = e.timestamp;
  x.text = 'x: ' + e.x;
  y.text = 'y:' + e.y;
  z.text = 'z:' + e.z;

  // Push the details onto the sample stack.
  recordings.push({
    timestamp: e.timestamp,
    x: e.x,
    y: e.y,
    z: e.z
  });
});

// Now take the current data and send an email.
var sendEmail = function () {
  // Need to do some stuff to make the array of objects in recordings to a CSV.
  // Or do JSON.stringify(recordings); attach to email and send. In php do json_decode($that_json_string); and it will be a associative array.
  // http://developer.appcelerator.com/question/18401/is-it-possible-to-send-email-from-appcelerator
};

control.addEventListener("click", function (e) {
  if (isRecording) {
    recordings = [];
    Ti.Accelerometer.removeEventListener("update", didSample);
    control.title = "Start";
  } else {
    // Kick of the accelerometer with a callback when it updates.
    Ti.Accelerometer.addEventListener("update", didSample);
    control.title = "Stop";
  }

  isRecording != isRecording; // Flip the state.
});

email.addEventListener("click", function (e) {
  if (recording.length > 0) {
    sendEmail();
  } else {
    alert("You've not done a recording yet!");
  }
});

// Now open the tab controller, which renders the windows.
tabGroup.addTab(recTab);

tabGroup.open();