The back button still enable when LoadingDialog is showing

[vincywindy]

Describe the bug
When the LoadingDialog is showing the back button press will go to last page.

To Reproduce
Steps to reproduce the behavior:
Here‘s two page ：

public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
        }

        private async void Button_Clicked(object sender, EventArgs e)
        {
            View1 view1 = new View1();
           await Navigation.PushModalAsync(view1);
        }
    }

public partial class View1 : ContentPage
    {
        public View1()
        {
            InitializeComponent();
        }

        private async void Button_Clicked(object sender, EventArgs e)
        {
            var dialog = await MaterialDialog.Instance.LoadingDialogAsync(message: "获取数据中……");
            await Task.Delay(5000);
            dialog.Dispose();
        }
    }

When the loadingdialog is showing,I press back button on android,it back to MainPage, but the loadingdialog still showing,after 5s loadingdialog hide.

[AnthonyLatty]

How was this solved??

[contrix09]

Hi, please update to the latest version. And instead of callingDispose to remove the dialog, you can now call DismissAsync.

[AnthonyLatty]

Thanks...Question is there a way to change the activity indicator color within the loading dialog??

[contrix09]

Yes, look for the overload method that takes the parameter of the type MaterialLoadingDialogConfiguration.

var loading = await MaterialDialog.Instance.LoadingDialogAsync("Please wait...", new XF.Material.Forms.UI.Dialogs.Configurations.MaterialLoadingDialogConfiguration
{
     TintColor = Color.Red
});

[AnthonyLatty]

I am going to test the DismissAsync() on a next Android device, because the one i am working with doesnt dismiss the dialog when the back button is pressed. What is the interval for a dialog to be dismissed?

[contrix09]

For now the loading dialog cannot by dismissed by pressing the back button on Android. If you used it in a using block, it will automatically be dismissed once the task inside the has completed, no need to call the DismissAsync. I'm still looking for a way to create an implementation where the user can cancel the dialog along with the task that is running. May be next year though.

[AnthonyLatty]

Okay no problem.

[vincywindy]

I use new version 1.3.0.3,but the problem is same, I use this code:

 [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class View1 : ContentPage
    {
        public View1()
        {
            InitializeComponent();
        }

        private async void Button_Clicked(object sender, EventArgs e)
        {
            using (await MaterialDialog.Instance.LoadingDialogAsync(message: "Something is running"))
            {
                await Task.Delay(5000); // Represents a task that is running.
            }


        }
    }

[contrix09]

Hi, did you override the OnBackPressed on Android like this:

public override void OnBackPressed()
{
    XF.Material.Droid.Material.HandleBackButton(base.OnBackPressed);
}

[vincywindy]

No,so I need to override it?

[vincywindy]

I override it,it works fine,thank you!