Adiciona o efeito de dropdown a uma lista de componentes Tableview, este efeito não existe por default na plataforma Titanium.

Titanium tableview dropdown

Ti.UI.setBackgroundColor('#000');
var win1 = Titanium.UI.createWindow({
  backgroundColor : '#fff',
	title : 'Win 1'
});
win1.open();

var data = [{
		title : 'One'
	}, {
		title : 'Two'
	}, {
		title : 'Three'
	}, {
		title : 'Four'
	}, {
		title : 'Five'
}];

var row, rows = [], intRow, intRows = data.length, lbl, viewRow, viewBack, intRowHeight = 50, varView;

for ( intRow = 0; intRow < intRows; intRow = intRow + 1) {
	(function() {
		row = Ti.UI.createTableViewRow({
			className : 'standard',
			expanded : false,
			height : intRowHeight,
			//selectionStyle : Ti.UI.iPhone.TableViewCellSelectionStyle.NONE,
			width : Ti.UI.FILL
		});

		varView = Ti.UI.createView({
			height : Ti.UI.FILL,
			width : Ti.UI.FILL
		});
		row.add(varView);

		viewRow = Ti.UI.createView({
			backgroundGradient : {
				type : 'linear',
				colors : [{
					color : '#97D9EF',
					position : 0.0
				}, {
					color : '#76C6E1',
					position : 0.50
				}, {
					color : '#56B4D3',
					position : 1.0
				}]
			},
			height : intRowHeight,
			top : 0,
			width : Ti.UI.FILL
		});
		varView.add(viewRow);
		lbl = Ti.UI.createLabel({
			height : Ti.UI.SIZE,
			highlightedColor : 'yellow',
			left : 15,
			text : data[intRow].title,
			width : Ti.UI.FILL
		});
		viewRow.add(lbl);
		viewBack = Ti.UI.createView({
			backgroundGradient : {
				type : 'linear',
				colors : [{
					color : '#000000',
					position : 0.0
				}, {
					color : '#CCCCCC',
					position : 1.0
				}]
			},
			height : 150,
			top : intRowHeight,
			width : Ti.UI.FILL
		});
		varView.add(viewBack);
		lblOpen = Ti.UI.createLabel({
			color : '#fff',
			height : Ti.UI.FILL,
			highlightedColor : '#fff',
			left : 15,
			text : data[intRow].title + data[intRow].title + data[intRow].title,
			width : Ti.UI.FILL
		});
		viewBack.add(lblOpen);

		row.addEventListener('click', function(e) {
			if (e.row.expanded) {
				e.row.setHeight(50);
				e.row.expanded = false;
			} else {
				e.row.setHeight(200);
				e.row.expanded = true;
			}
		});

		rows.push(row);
	})();
}

var tbl = Ti.UI.createTableView({
	data : rows,
	height : Ti.UI.FILL,
	separatorColor : 'transparent',
	width : Ti.UI.FILL
});

win1.add(tbl);