[TIMOB-3464] Android: Throws NullPointerException when tag not found

In Android, when you getElementsByTagName() and element that doesn't exist, It throws a NPE.
note: iOS does not throw an exception

Step 0: Notice 'bas' is not in the xmlString in the example
Step 1: Paste example code below into appi.js
Step 2: Run example
Step 3: Click 'Find Bas'
Step 4: Notice the Null Pointer Exception

var xmlString = '<items><foo>FOO</foo><bar>BAR</bar></items>';

var window = Ti.UI.createWindow({
    backgroundColor: 'green'
});

var button = Ti.UI.createButton({
    title: 'Find Foo',
    height: 60,
    width: 100,
  top: 40
});
button.addEventListener('click', function(e){
    var xml = Titanium.XML.parseString(xmlString);
  var element = xml.getElementsByTagName("foo");
  Ti.API.info( element.item(0).text );
});

var button2 = Ti.UI.createButton({
    title: 'Find Bas',
    height: 60,
    width: 100,
  top: 140
});
button2.addEventListener('click', function(e){
    var xml = Titanium.XML.parseString(xmlString);
  var element = xml.getElementsByTagName("bas");
  Ti.API.info( element.item(0).text );
});

window.add(button);
window.add(button2);
window.open();

Tested On

TiSDK 1.6.1, Android SDK 2.1

Associated Helpdesk Ticket

http://support-admin.appcelerator.com/display/WEJ-65612-589">http://support-admin.appcelerator.com/display/WEJ-65612-589