System.NotSupportedException: Unable to activate instance of type MyProject.CancelListener from native handle
In my Xamarin Forms app, I am using native Android code for the platform. I want to show a AlertDialog.Builder and catch the event when the user taps outside of the dialog box with SetOnCancelListener. This is my code:
AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.SetTitle("title");
adb.SetItems(myItems.Select(x => x.Name).ToArray(), (s, e) =>
{
// not important code
});
var cancelled = new CancelListener();
cancelled.Cancelled += (s, e) =>
{
// not important code
};
adb.SetCancelable(true);
adb.SetOnCancelListener(cancelled);
Dialog d = adb.Create();
d.Show();
My CancelListener class:
public class CancelListener : Java.Lang.Object, IDialogInterfaceOnCancelListener
{
public event EventHandler Cancelled;
public IntPtr Handle => IntPtr.Zero;
public CancelListener() : base()
{
}
public void Dispose()
{
Cancelled = null;
}
public void OnCancel(IDialogInterface dialog)
{
Cancelled?.Invoke(null, EventArgs.Empty);
}
}
When I tap outside of the dialog box I get the message:
System.NotSupportedException: Unable to activate instance of type
MyProject.CancelListener from native handle
xamarin.forms xamarin.android
asked Nov 15 '18 at 21:43
DariusDarius
60811643
add a comment |
In my Xamarin Forms app, I am using native Android code for the platform. I want to show a AlertDialog.Builder and catch the event when the user taps outside of the dialog box with SetOnCancelListener. This is my code:
AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.SetTitle("title");
adb.SetItems(myItems.Select(x => x.Name).ToArray(), (s, e) =>
{
// not important code
});
var cancelled = new CancelListener();
cancelled.Cancelled += (s, e) =>
{
// not important code
};
adb.SetCancelable(true);
adb.SetOnCancelListener(cancelled);
Dialog d = adb.Create();
d.Show();
My CancelListener class:
public class CancelListener : Java.Lang.Object, IDialogInterfaceOnCancelListener
{
public event EventHandler Cancelled;
public IntPtr Handle => IntPtr.Zero;
public CancelListener() : base()
{
}
public void Dispose()
{
Cancelled = null;
}
public void OnCancel(IDialogInterface dialog)
{
Cancelled?.Invoke(null, EventArgs.Empty);
}
}
When I tap outside of the dialog box I get the message:
System.NotSupportedException: Unable to activate instance of type
MyProject.CancelListener from native handle
xamarin.forms xamarin.android
asked Nov 15 '18 at 21:43
DariusDarius
60811643
this may help stackoverflow.com/questions/10593022
– AbbyWang - MSFT
Nov 16 '18 at 9:55
It did not help, but thanks anyhow
– Darius
Nov 16 '18 at 15:56
add a comment |
In my Xamarin Forms app, I am using native Android code for the platform. I want to show a AlertDialog.Builder and catch the event when the user taps outside of the dialog box with SetOnCancelListener. This is my code:
AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.SetTitle("title");
adb.SetItems(myItems.Select(x => x.Name).ToArray(), (s, e) =>
{
// not important code
});
var cancelled = new CancelListener();
cancelled.Cancelled += (s, e) =>
{
// not important code
};
adb.SetCancelable(true);
adb.SetOnCancelListener(cancelled);
Dialog d = adb.Create();
d.Show();
My CancelListener class:
public class CancelListener : Java.Lang.Object, IDialogInterfaceOnCancelListener
{
public event EventHandler Cancelled;
public IntPtr Handle => IntPtr.Zero;
public CancelListener() : base()
{
}
public void Dispose()
{
Cancelled = null;
}
public void OnCancel(IDialogInterface dialog)
{
Cancelled?.Invoke(null, EventArgs.Empty);
}
}
When I tap outside of the dialog box I get the message:
System.NotSupportedException: Unable to activate instance of type
MyProject.CancelListener from native handle
xamarin.forms xamarin.android
asked Nov 15 '18 at 21:43
DariusDarius
60811643
In my Xamarin Forms app, I am using native Android code for the platform. I want to show a AlertDialog.Builder and catch the event when the user taps outside of the dialog box with SetOnCancelListener. This is my code:
AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.SetTitle("title");
adb.SetItems(myItems.Select(x => x.Name).ToArray(), (s, e) =>
{
// not important code
});
var cancelled = new CancelListener();
cancelled.Cancelled += (s, e) =>
{
// not important code
};
adb.SetCancelable(true);
adb.SetOnCancelListener(cancelled);
Dialog d = adb.Create();
d.Show();
My CancelListener class:
public class CancelListener : Java.Lang.Object, IDialogInterfaceOnCancelListener
{
public event EventHandler Cancelled;
public IntPtr Handle => IntPtr.Zero;
public CancelListener() : base()
{
}
public void Dispose()
{
Cancelled = null;
}
public void OnCancel(IDialogInterface dialog)
{
Cancelled?.Invoke(null, EventArgs.Empty);
}
}
When I tap outside of the dialog box I get the message:
System.NotSupportedException: Unable to activate instance of type
MyProject.CancelListener from native handle
xamarin.forms xamarin.android
xamarin.forms xamarin.android
asked Nov 15 '18 at 21:43
DariusDarius
60811643
asked Nov 15 '18 at 21:43
DariusDarius
60811643
asked Nov 15 '18 at 21:43
DariusDarius
60811643
asked Nov 15 '18 at 21:43
DariusDarius
60811643
asked Nov 15 '18 at 21:43
DariusDarius
60811643
60811643
this may help stackoverflow.com/questions/10593022
– AbbyWang - MSFT
Nov 16 '18 at 9:55
It did not help, but thanks anyhow
– Darius
Nov 16 '18 at 15:56
add a comment |
this may help stackoverflow.com/questions/10593022
– AbbyWang - MSFT
Nov 16 '18 at 9:55
It did not help, but thanks anyhow
– Darius
Nov 16 '18 at 15:56
this may help stackoverflow.com/questions/10593022
– AbbyWang - MSFT
Nov 16 '18 at 9:55
this may help stackoverflow.com/questions/10593022
– AbbyWang - MSFT
Nov 16 '18 at 9:55
It did not help, but thanks anyhow
– Darius
Nov 16 '18 at 15:56
It did not help, but thanks anyhow
– Darius
Nov 16 '18 at 15:56
add a comment |
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this may help stackoverflow.com/questions/10593022
– AbbyWang - MSFT
Nov 16 '18 at 9:55
It did not help, but thanks anyhow
– Darius
Nov 16 '18 at 15:56