Xamarin.forms android Prism 处理硬件后退按钮

Question

I am having issue while handling back button on android device. I want to handle navigation stack while user press hardware back button how I can achieve this?

Answer 1

You can override the OnBackButtonPressed() function

protected override bool OnBackButtonPressed (){
    //Handle your navigation here
}

Details from the official docs

Note : this will only work for Android, but that seems to be the only platform you are asking for. If you require a cross-platform solution, see this question.

Answer 2

I don't know it's a good practice, but it worked to me.

protected override bool OnBackButtonPressed()
{
    var vm = (SignInViewModel)BindingContext;

    vm.GoBackCommand.Execute();

    return base.OnBackButtonPressed();
}

At ViewModel you can handle what you want to perform.