Xamarin.Android Cannot disable a button by binding "Enabled" which has binding "Click"

[hungnguyenepiserver]

🐛 Bug Report

Xamarin.Android Cannot disable a button by binding "Enabled" which has binding "Click"

Expected behavior

Button can be disabled by binding "Enabled" in .axml code, not depends or relate to "Click" event of "Click" Binding

Reproduction steps

1. Binding Click command and Enabled state variable to a button
2. Click command has logic to change "Enabled" state
3. Run app
4. Click to the button

Configuration

Version: 7.x

Platform:

• Xamarin.Android

Some code:

private async Task ClickEvent()
{
this.EnableBtn = !this.EnableBtn;
}

    private bool enableBtn;
    public bool EnableBtn
    {
        get => enableBtn;
        set
        {
            enableBtn = value;
            RaisePropertyChanged(() => EnableBtn);
        }
    }
    
    private MvxAsyncCommand clickCommand;
    public MvxAsyncCommand ClickCommand
    {
        get
        {
            this.clickCommand = this.clickCommand ?? new MvxAsyncCommand(this.ClickEvent);
            return this.clickCommand;
        }
    }

[elstringo]

Are you aware you can get the desired behaviour by using a 'CanExecute' Func/method for your MvxAsyncCommand, and not binding to the Enabled property?
So something like this...

private MvxAsyncCommand clickCommand;
public MvxAsyncCommand ClickCommand
{
    get
    {
        clickCommand = clickCommand ?? new MvxAsyncCommand(ClickCommandExecute, ClickCommandCanExecute);
        return clickCommand;
    }
}

private async Task ClickCommandExecute()
{
    EnableButton = !EnableButton;
    await Task.CompletedTask;
}

private bool ClickCommandCanExecute()
{
    return EnableButton;
}

private bool enableBtn;
public bool EnableBtn
{
    get => enableBtn;
    set
    {
        if (SetProperty(ref enableBtn, value))
        {
            ClickCommand.RaiseCanExecuteChanged();
        }
    }
}

[hungnguyenepiserver]

Are you aware you can get the desired behaviour by using a 'CanExecute' Func/method for your MvxAsyncCommand, and not binding to the Enabled property?
So something like this...

private MvxAsyncCommand clickCommand;
public MvxAsyncCommand ClickCommand
{
    get
    {
        clickCommand = clickCommand ?? new MvxAsyncCommand(ClickCommandExecute, ClickCommandCanExecute);
        return clickCommand;
    }
}

private async Task ClickCommandExecute()
{
    EnableButton = !EnableButton;
    await Task.CompletedTask;
}

private bool ClickCommandCanExecute()
{
    return EnableButton;
}

private bool enableBtn;
public bool EnableBtn
{
    get => enableBtn;
    set
    {
        if (SetProperty(ref enableBtn, value))
        {
            ClickCommand.RaiseCanExecuteChanged();
        }
    }
}

Thanks for your idea. @elstringo
But I'm considering using Enable because of I also want the button change the color following enable change.

[o0k4m1]

I have resolved this by switching places of bind items:

        app:MvxBind="Click AddNewItemCommand;Enabled IsValid"

So this might be a temporary solution.