NativeScript/apps/ui/app/list-view/dynamic-templates-page.xml

<Page loaded="pageLoaded">
    <GridLayout id="grid-layout">
        <ListView id="lv1" items="{{ items }}" itemTemplateSelector="age % 2 === 0 ? 'green':'red'" itemTap="onItemTap">
            <ListView.itemTemplates>
                <template key="red">
                    <Label text="{{ name + ' ' + id }}" style.backgroundColor="red"/>
                </template>
                <template key="green">
                    <Label text="{{  name + ' ' + id }}" style.backgroundColor="green"/>
                </template>
            </ListView.itemTemplates>
        </ListView>
    </GridLayout>
</Page>