Setting a Android walpaper using Titanium

Android Walpaper

Titanium.UI.setBackgroundColor('#000');
var win = Titanium.UI.createWindow({
	title : 'Test',
	backgroundColor : '#000',
	fullscreen : false,
	exitOnClose : true
});
var cb = function(data) {
	var blob = data.media;
	Ti.API.info(blob);
	Ti.Media.Android.setSystemWallpaper(blob, true);
};
var err = function(e) {
	Ti.API.error(e);
};
var cancel = function() {
	Ti.API.warn('Cancelled');
};

var btn = Ti.UI.createButton({
	title : 'Camera',
	top : 0,
	height : "40dp",
	left : 0,
	right : 0
});
win.add(btn);
btn.addEventListener('click', function() {
	Ti.Media.showCamera({
		success : cb,
		error : err,
		cancel : cancel
	});
});

var gallery = Ti.UI.createButton({
	title : 'Gallery',
	top : "45dp",
	height : "40dp",
	left : 0,
	right : 0
});
gallery.addEventListener('click', function() {
	Ti.Media.openPhotoGallery({
		success : cb,
		error : err,
		cancel : cancel
	});
});
win.add(gallery);

var file = Ti.UI.createButton({
	title : 'File',
	top : "90dp",
	height : "40dp",
	left : 0,
	right : 0
});
file.addEventListener('click', function() {
	var f = Ti.Filesystem.getFile('KS_nav_ui.png');
	var blob = f.read();
	Ti.Media.Android.setSystemWallpaper(blob, true);
});
win.add(file);

win.open();