How can I use PopupWindow in Xamarin android?

Question

I am trying to use PopupWindow to inflate layout, but I have not found any example in internet. Could you teach me how to use it.

This is my current code but it is not showing popupWindow

private void ShowMenu(ImageButton anchor, Dictionary<string, object> data)
{
    LayoutInflater inflater = (LayoutInflater)_context.GetSystemService(Context.LayoutInflaterService);
    View popupView = inflater.Inflate(Resource.Layout.menu_outlet_buttons, null);

    int width = LinearLayout.LayoutParams.WrapContent;
    int height = LinearLayout.LayoutParams.WrapContent;
    bool focusable = true;

    PopupWindow popupWindow = new PopupWindow(popupView.Context);
    popupWindow.ShowAtLocation(_view, GravityFlags.Center, 0, 0);
}

By the way this is an Adapter

public MyAdapter(List<Dictionary<string, object>> data, Context context)
{
    _data = data;
    _context = context;
}

This is my reference, but I could not reproduce the same in Xamarin Android.

How to create a popup window (PopupWindow) in Android

Liyun Zhang - MSFT · Accepted Answer · 2022-06-17T08:45:04.283

1

The method you create the instance of the PopupWindow is wrong. I tried the following code in my project, it worked well:

View view =  LayoutInflater.Inflate(Resource.Layout.popup, null);
PopupWindow popupWindow = new PopupWindow(view,LinearLayout.LayoutParams.WrapContent, LinearLayout.LayoutParams.WrapContent,true);
popupWindow.ShowAtLocation(view, GravityFlags.Center, 0, 0);

Update:

I had checked the popupWindow.ShowAtLocation method, the first parameter is the parent view.

And you can get the x,y by the following code:

int[] location = new int[2];
imagebutton.GetLocationOnScreen(location);
int x = location[0];
int y = location[1];

edited Jun 17 '22 at 08:45

answered Jun 17 '22 at 07:53

Liyun Zhang - MSFT

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Did you declare this? ``LayoutInflater inflater = (LayoutInflater)_context.GetSystemService(Context.LayoutInflaterService);`` – Elohist Jun 17 '22 at 08:00
Is my declaration in ``inflater`` is correct? – Elohist Jun 17 '22 at 08:00
It seems that we needn't to declare this in xamarin.android. Of course ,if do that also ok.@Elohist – Liyun Zhang - MSFT Jun 17 '22 at 08:05
Now it is working. Thank you. But I want to inflate this on ``anchor``. Could you teach me how to do this? – Elohist Jun 17 '22 at 08:09
I can't understand ' inflate this on anchor' clearly, can you show more detail or post a new question?@Elohist – Liyun Zhang - MSFT Jun 17 '22 at 08:13
Because it inflate only at the center of the screen. I want to inflate it on certain object which is the ``ImageButton achor`` – Elohist Jun 17 '22 at 08:15
``PopupMenu menu = new PopupMenu(_context, anchor);`` Actually this my code before in ``PopupMenu`` which receives the achor parameter – Elohist Jun 17 '22 at 08:16
The popupWindow.ShowAtLocation decide the location of the popupWindow, you can get the X, Y of the ImageButton and use `popupWindow.ShowAtLocation(view, GravityFlags.Center, x, y);`. @Elohist – Liyun Zhang - MSFT Jun 17 '22 at 08:18
Could you teach me how to get X and Y location of anchor object? I trying to search it on internet but I could not find xamarin.android code – Elohist Jun 17 '22 at 08:27
I had test just now, you can try to use `popupWindow.ShowAtLocation(imagebutton, GravityFlags.NoGravity, 0, 0);` @Elohist – Liyun Zhang - MSFT Jun 17 '22 at 08:27
It shows at the top left corner only. – Elohist Jun 17 '22 at 08:37
Sorry for the late reply, please check the update in the answer.@Elohist – Liyun Zhang - MSFT Jun 17 '22 at 08:45

How can I use PopupWindow in Xamarin android?

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