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The layout of each row in the ItemsSource is defined within the ListView.ItemTemplate element.

The data source of the ListView is set via the ItemsSource attribute. This XAML example defines a ContentPage that contains a ListView. The following snippet demonstrates a ListView bound to a list of employees:

While a ListView will update in response to changes in its underlying ObservableCollection, a ListView will not update if a different ObservableCollection instance is assigned to the original ObservableCollection reference (e.g. Mono will be added to the ListView because it uses an ObservableCollectionĮmployees.Add(new Employee()) ObservableCollection is defined in and is just like List, except that it can notify ListView of any changes: ObservableCollection employees = new ObservableCollection() If you want the ListView to automatically update as items are added, removed and changed in the underlying list, you'll need to use an ObservableCollection. List items are automatically inserted to a list using an Adapter that pulls the content from a source such as an arraylist, array or database. To customize how data is displayed, see Cell Appearance.īecause ItemsSource has been sent to an array, the content will not update as the underlying list or array changes. By default, ListView will call ToString and display the result in a TextCell for each row. In the Welcome to Android Studio dialog, select Open an existing Android Studio project. This approach will populate the ListView with a list of strings. To kick things off, start by downloading the materials for this tutorial (you can find a link at the top or bottom of the page) and open Android Studio 3.0.1 or greater. The equivalent C# code is: var listView = new ListView() The simplest way to populate a ListView involves using an array of strings: ItemsSourceĪ ListView is populated with data using the ItemsSource property, which can accept any collection implementing IEnumerable. This article explains how to populate a ListView with data and how to bind data to the selected item. Public class HomeActivity extends AppCompatActivity implements AsyncResponse, AdapterView.A Xamarin.Forms ListView is used for displaying lists of data. It always sends me back to my login page whenever I press an item on the list.