Obtain the details of a selected item in a list by tapping on it using Natives

I am wondering how to retrieve the context of a tapped item in a listview. For example, if there are three items in the list, how can I determine that the second item was clicked and access the data related to that item in the observable array?

For instance, in the list template below, if a user taps on the second connection in the list of connections, how can I retrieve the data associated with that connection based on the index of the clicked item?

<ListView items="{{ connections }}" loaded="" itemLoading="" itemTap="">
    <ListView.itemTemplate>
        <StackLayout class='connection-li'>
            <GridLayout class="connection-info" rows="" columns="auto, *, *" tap="goToMeasurements">
                <Image col="0" src="res://ic_person_black_36dp" stretch ="none" />                        
                <Label col="1" class="connection-name" text="{{ PatientFirstName + ' ' + PatientLastName }}" textWrap="false" />
                <Image col="2" verticalAlignment="middle" horizontalAlignment="right" src="res://ic_cancel_black_18dp" stretch ="none" />                        
            </GridLayout>                                                       
        </StackLayout>
    </ListView.itemTemplate>
</ListView>

UPDATE: According to the documentation, I have found an event that allows me to capture the index data. However, how can I specify which ListView I want to target when it refers to all ListViews? Is there a way to assign a specific reference or class to access it?

listView.on(listViewModule.ListView.itemTapEvent, function (args: listViewModule.ItemEventData) {
    var tappedItemIndex = args.index;
    var tappedItemView = args.view;
    //// Do something
});

Answer â„–1

To implement event handling in your application, you can utilize a javascript file that corresponds to the specific page you are working on. For example, if you have a main-page.xml file, you would create a main-page.js file as well. Within this javascript file, you can define and handle events such as itemTap by specifying it in the corresponding attribute:

<ListView items="{{ connections }}" itemTap="onConnectionTapped">

Make sure to export the defined event from your javascript file. This will allow you to access the data object associated with the tapped item. There are multiple ways to retrieve this information:

export function onConnectionTapped(args) {
    var tappedView = args.view,
        //the View will have a bindingContext 
        // set to the individual item from the list
        tappedItem = tappedView.bindingContext;

    //Alternatively, if you require the entire list along with the tapped item, 
    //you can obtain it from the Page's bindingContext
    //since each View has a reference to the Page it is on
    var pageBindingContext = tappedView.page.bindingContext,
        fullItemsList = pageBindingContext.connections,
        itemForTap = fullItemsList[args.index];
}

Answer â„–2

When using the goToMeasurements function, the parameter args.object will refer to a GridLayout. The property .bindingContext of this GridLayout will hold a data element from your connections array. To obtain the index of this data element, you can use connections.indexOf(dataElement).

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