Xamarin PhoneDialer.Open with firebase realtime database - xamarin.forms

Question

When I try to use PhoneDialer.Open, the application crashes.
I am trying to pull the phone number from firebase realtimedatabase.
<Image Source="phone.png"
HeightRequest="20"
WidthRequest="20" Margin="10,0,0,0">
<Image.GestureRecognizers>
<TapGestureRecognizer Tapped="CallTap_Tapped"
CommandParameter="{Binding Tel}"/>
</Image.GestureRecognizers>
</Image>
and class
public void CallTap_Tapped(object sender, EventArgs e)
{
string telTaxi = new TaxiSlovenskoModel().Tel;
PhoneDialer.Open(telTaxi);
}
UPDATE
Example:
TaxiSlovenskoModel:
public class TaxiSlovenskoModel
{
public string Id { get; set; }
public string Name { get; set; }
public string Kraj { get; set; }
public string Mesto { get; set; }
public string Tel { get; set; }
public string Description { get; set; }
public string Image { get; set; }
}
TaxiListPage.xaml:
<Image Source="phone.png"
HeightRequest="20"
WidthRequest="20" Margin="10,0,0,0">
<Image.GestureRecognizers>
<TapGestureRecognizer Tapped="CallTap_Tapped"
CommandParameter="{Binding Tel}"/>
</Image.GestureRecognizers>
</Image>
and TaxiListPage.xaml.cs:
TaxiRepository taxiRepository = new TaxiRepository();
public TaxiListPage()
{
InitializeComponent();
}
protected override async void OnAppearing()
{
var taxies = await taxiRepository.GetAll();
TaxiListView.ItemsSource = taxies;
}
private void AddToolBarItem_Clicked(object sender, EventArgs e)
{
Navigation.PushModalAsync(new TaxiEntry());
}
private void TaxiListView_ItemTapped(object sender, ItemTappedEventArgs e)
{
if (e.Item == null)
{
return;
}
var taxi = e.Item as TaxiSlovenskoModel;
Navigation.PushModalAsync(new TaxiDetail(taxi));
((ListView)sender).SelectedItem = null;
}
public void CallTap_Tapped(object sender, EventArgs e)
{
string telTaxi = new TaxiSlovenskoModel().Tel;
PhoneDialer.Open(telTaxi);
}
Database:
enter image description here
In APP:
enter image description here

Answer 1

The reason this is happening is probably that you are missing your Manifest query that you need if you Target Android 11:
<queries>
<intent>
<action android:name="android.intent.action.DIAL" />
<data android:scheme="tel"/>
</intent>
</queries>
More information here: https://learn.microsoft.com/en-us/xamarin/essentials/phone-dialer?tabs=android
UPDATE:
So the issue is that you are creating a new object instead of actually using your existing object. your call method should look as follows:
public void CallTap_Tapped(object sender, EventArgs e)
{
var tappEvent = (TappedEventArgs)e;
var telTaxi = tappEvent?.Parameter.ToString();
if(!string.IsNullOrWhiteSpace(telTaxi))
PhoneDialer.Open(telTaxi);
}
Good luck