Test writing files to filesystem

app.js

var win = Ti.UI.createWindow({
	backgroundColor: 'blue',
	layout: 'vertical'
});

var testFile;

var label = Ti.UI.createLabel({
	top: 10,
	height: 100,
	width: 300,
	backgroundColor: "green",
	text: "Read the text file already!"
});
win.add(label);

var tfield = Ti.UI.createTextField({
	top: 10,
	height: 40,
	width: 200,
	borderStyle:Titanium.UI.INPUT_BORDERSTYLE_ROUNDED,
	value: "text written via write()"
});
tfield.addEventListener('return', function(e){
	tfield.blur();
});
win.addEventListener('click', function(e){
	tfield.blur();
});
win.add(tfield);

var createButton = Ti.UI.createButton({
	top: 20,
	height: 50,
	width: 200,
	title: "Create File"
});
createButton.addEventListener('click', function(e){
	 testFile = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, 'text.txt');
});
win.add(createButton);

var writeButton = Ti.UI.createButton({
	top: 20,
	height: 50,
	width: 200,
	title: "Write File"
});
writeButton.addEventListener('click', function(e){
	Ti.API.info('text.txt exists? ' + testFile.exists());
	Ti.API.info('text.txt size: ' + testFile.size + ' bytes');

	if(!testFile.write(tfield.value)) {
		Ti.API.info("could not write string to file.");
	}
});
win.add(writeButton);

var readButton = Ti.UI.createButton({
	top: 20,
	height: 50,
	width: 200,
	title: "Read File"
});
readButton.addEventListener('click', function(e){
	Ti.API.info('text.txt exists? ' + testFile.exists());
	Ti.API.info('text.txt size: ' + testFile.size + ' bytes');

	var text = testFile.read().text;
	Ti.API.info('#### Text of testFile: ['+text+']');
	label.text = text;
});
win.add(readButton);

var deleteButton = Ti.UI.createButton({
	top: 20,
	height: 50,
	width: 200,
	title: "Delete File"
});
deleteButton.addEventListener('click', function(e){
	testFile.deleteFile();
});
win.add(deleteButton);

win.open();