displaying alert dialog in the correct location within a recyclerview - android-recyclerview

Question

I'm making a custom button that when you long press on it a dialog will appear with a list of options to choose from.
The custom button works as it should, however, I'm having some trouble wrangling the dialog to show up exactly where I want it to.
this is the code that displays the dialog.
private void ShowReactionsDialog()
{
var context = Context;
var inflater = (LayoutInflater) context.GetSystemService(Context.LayoutInflaterService);
var dialogView = inflater.Inflate(Resource.Layout.react_dialog_layout, null);
var linearLayoutManager = new LinearLayoutManager(context)
{
Orientation = LinearLayoutManager.Horizontal
};
var adapter = new ReactionAdapter(_reactionList);
adapter.OnItemClicked += (sender, currentReaction) =>
{
UpdateReactButtonByReaction(currentReaction);
_reactAlertDialog.Cancel();
};
var rvReactions = dialogView.FindViewById<RecyclerView>(Resource.Id.reaction_rvReactions);
rvReactions.HasFixedSize = true;
rvReactions.SetLayoutManager(linearLayoutManager);
rvReactions.SetItemAnimator(new DefaultItemAnimator());
rvReactions.SetAdapter(adapter);
var dialogBuilder = new AlertDialog.Builder(context);
dialogBuilder.SetView(dialogView);
_reactAlertDialog = dialogBuilder.Create();
_reactAlertDialog.RequestWindowFeature((int)WindowFeatures.NoTitle);
var window = _reactAlertDialog.Window;
window.SetBackgroundDrawableResource(Resource.Drawable.react_dialog_shape);
window.SetDimAmount(0);
// Setup dialog gravity and dynamic position
var windowManagerAttributes = window.Attributes;
windowManagerAttributes.Gravity = GravityFlags.AxisSpecified;
windowManagerAttributes.X = (int) GetX() + (Width / 2);
windowManagerAttributes.Y = (int) GetY() + (Height / 2);
_reactAlertDialog.Show();
var dialogWidth = GetIconSize() * _reactionList.Count;
if (dialogWidth > GetScreenMaxWidth())
{
dialogWidth = GetScreenMaxWidth();
}
window.SetLayout(dialogWidth, ViewGroup.LayoutParams.WrapContent);
}
I've tried messing with the gravity and the X & Y coordinates but it just wants to either go too high up or too low down, there's no consistent location it's sticking to. I want it to be above the button that's getting long tapped.

Answer 1

You can use the following code to make the AlertDialog show above the button.
int[] location = new int[2];
AndroidX.AppCompat.App.AlertDialog alertDialog = builder.Create();
Window window = alertDialog.Window;
WindowManagerLayoutParams attributes = window.Attributes;
//Get the location of the button and location[0] is X and location[1] is Y
button.GetLocationInWindow(location);
//Set the height of the AlertDialog
int height = 400;
int a = button.Height / 2;
int c = location[1];
//Get the distance of top
attributes.Y = c - a - height;
window.Attributes = attributes;
//Set the AlertDialog location according to the distance of top
window.SetGravity(GravityFlags.Top);
alertDialog.Show();
//Set the Width and Hight of the AlertDialog
alertDialog.Window.SetLayout(800, height);