从另一个Fragment中的Fragment调用方法

Question

I have a problem. I have 2 fragments with methods. Now I want to call a method from Fragment2.cs inside Fragment1.cs. Here is the method from Fragment2.cs:

public void UpdateActionBar(int CurrentFragmentNum)
{
    if (CurrentFragmentNum == 1)
    {
        btnBack.Visibility = ViewStates.Invisible;
        btnNext.Visibility = ViewStates.Invisible;
    }
    else
    {
        btnBack.Visibility = ViewStates.Visible;
        btnNext.Visibility = ViewStates.Visible;
    }

    if (CurrentFragmentNum == 3)
    {
        btnNext.Text = "Finish";
    }
    else
    {
        btnNext.Text = "Next";
    }
}

And in Fragment1.cs I need to call this method! How can I do that... I already know how to call a method from the MainActivity using this:

(Activity as MainActivity)?.Method();

But now I want the method from another fragment.
I have already tried something like this:

(Fragment as Fragment2)?.Method();

But that gives me the error:

'Fragment' is a type, which is not valid in the given context

Can someone help me?

Answer 1

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