How to display alert dialog at desired location and return result?

codemaster007

I have a keyboard modal window which is 9*9. And used it fill Sudoku game board. In android studio , to get the location of the button I used the following code

_selectedButton=(Button)view;

        int tag=(int)_selectedButton.getTag();
        _currentRow=tag/9;
        _currentCol=tag%9;
int[] location=new int[2];
        _selectedButton.getLocationOnScreen(location);
        _p=new Point();
        _p.x=location[0];
        _p.y=location[1];

        ShowKeyBoard();

ShowKeyBoard is like this

int offsetX=30;
int offsetY=30;
_popupWindow.showAtLocation(_keyBoardLayout, Gravity.NO_GRAVITY, _p.x+offsetX, _p.y+offsetY);
After that he selects a key and I dismiss the popup window.

public void BtnKey1Pressed(View view)
    {
        _selectedButton.setText("1");
        _popupWindow.dismiss();
    }

In Xamarin what I did until now is

protected void InitKeyBoard()
{
 //Init KeyBoard
            _keyBoard = new AlertDialog.Builder(this);
            _keyBoard.SetView(LayoutInflater.Inflate(Resource.Layout.keyboard, null));
            _keyBoard.Create();
}

private void BtnGrdMatrix_Click(object sender,EventArgs es)
        {
           _keyBoard.Show();

        }

How can I do that in Xamarin Android.? Is it possible to get return data like this in xamarin.?

What I want is

int selectedKey=ShowKeyBoard();