Confirmation Dialog on back button press event Xamarin.Forms
Here's the code that worked for me
protected override bool OnBackButtonPressed()
{
Device.BeginInvokeOnMainThread(async () =>
{
var result = await this.DisplayAlert("Alert!", "Do you really want to exit?", "Yes", "No");
if (result)
{
System.Diagnostics.Process.GetCurrentProcess().CloseMainWindow(); // Or anything else
}
});
return true;
}
Easy way to override hardware back button and show a confirmation dialog box to user
protected override bool OnBackButtonPressed()
{
Device.BeginInvokeOnMainThread(async () =>
{
if (await DisplayAlert("Alert", "Are you sure you want to go back ?", "Yes", "No"))
{
base.OnBackButtonPressed();
await Navigation.PopAsync();
}
});
return true;
}
protected override bool OnBackButtonPressed()
{
Device.BeginInvokeOnMainThread(async() => {
var result = await this.DisplayAlert("Alert!", "Do you really want to exit?", "Yes", "No");
if (result) await this.Navigation.PopAsync(); // or anything else
});
return true;
}
If you are on Mainpage and want to exit your app then this code will help you.
In your UI (PCL)
protected override bool OnBackButtonPressed()
{
Device.BeginInvokeOnMainThread(new Action(async () => {
var result = await this.DisplayAlert("Alert!", "Do you really want to exit?", "Yes", "No");
if (result)
{
if (Device.RuntimePlatform == Device.Android)
DependencyService.Get<IAndroidMethods>().CloseApp();
}
}));
return true;
}
Also create an Interface (in your UI PCL):
public interface IAndroidMethods
{
void CloseApp();
}
Now implement the Android-specific logic in your Android project:
[assembly: Xamarin.Forms.Dependency(typeof(AndroidMethods))]
namespace Your.Namespace
{
public class AndroidMethods : IAndroidMethods
{
public void CloseApp()
{
var activity = (Activity)Forms.Context;
activity.FinishAffinity();
}
}
}