chd.hwbackbuttonmanager's Introduction

CHD.HWBackButtonManager

If this project help you reduce time to develop, you can give me a cup of coffee :)

Singlenton util to handle the android hardware back button in a .NetStandard project

How to install:

You can install from the nuget manager in visual studio

nuget link: https://www.nuget.org/packages/CHD.HWBackButtonManager/#

Usage:

On your pcl project page:

protected override void OnAppearing()
{
    base.OnAppearing();

    bool OnBackButtonPressed()
    {
        return false; //false ignore backbutton
    }

    HWBackButtonManager.OnBackButtonPressedDelegate onBackButtonPressedDelegate = new HWBackButtonManager.OnBackButtonPressedDelegate(OnBackButtonPressed);

    HWBackButtonManager.Instance.SetHWBackButtonListener(onBackButtonPressedDelegate);
 

}



protected override void OnDisappearing()
{
    base.OnDisappearing();
    HWBackButtonManager.Instance.RemoveHWBackButtonListener(); // other pages allow backbutton
}

On your andriod MainActivity:

public override void OnBackPressed()
{


    if (!CHD.HWBackButtonManager.Instance.NotifyHWBackButtonPressed()){
        return;
    }

    base.OnBackPressed();
}

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chd.hwbackbuttonmanager's Issues

MasterDetail BackButton

Hello,

Loved this manager.

First: https://www.nuget.org/packages/CHD.HWBackButtonManager
The github link on the page above have a typo on the end of the link...

Now the question:
It worked with the backbutton but how can I made the back button on the master detail menu trigger the same methods?
` protected override void OnAppearing()
{
base.OnAppearing();

        bool OnBackButtonPressed()
        {
            ConfirmLeave();
            return false; //false ignore backbutton
        }

        HWBackButtonManager.OnBackButtonPressedDelegate onBackButtonPressedDelegate = new HWBackButtonManager.OnBackButtonPressedDelegate(OnBackButtonPressed);

        HWBackButtonManager.Instance.SetHWBackButtonListener(onBackButtonPressedDelegate);


    }

    private async void ConfirmLeave()
    {
        var rslt = await DisplayAlert(":o",
                                     "Are you sure?",
                                     "Yep", "Nop");
        if (rslt)
        {
            await Navigation.PopAsync();
        }
    }`

Thanks by advance

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