PointerGesture events not firing on Android when attached to a map view

[jshafferman-lt]

I am currently using NET SDK 10.0.5 and using the latest MAUI controls 10.0.51. Whenever attaching the MapView to PointerGestureRecognizer it appears to not send across the events for PointerMoved and PointerReleased. I do know there was a bug fix to address this issue inside of MAUI. I assume we will have to wait until ESRI has those MAUI controls added to them (>= 10.0.5). I thought I would at least post the issue in here in case it is something else.

This is the main page xaml:

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:esri="http://schemas.esri.com/arcgis/runtime/2013"
             x:Class="MauiTemplate.Pages.MainPage">
    <esri:MapView>
        <esri:MapView.GestureRecognizers>
            <PointerGestureRecognizer
                PointerMoved="PointerGestureRecognizer_OnPointerMoved"
                PointerReleased="PointerGestureRecognizer_OnPointerReleased"/>
        </esri:MapView.GestureRecognizers>
    </esri:MapView>
</ContentPage>

This is the xaml code behind:

using System.Diagnostics;

namespace MauiTemplate.Pages;

public partial class MainPage : ContentPage
{
    public MainPage()
    {
        InitializeComponent();
    }

    private void PointerGestureRecognizer_OnPointerMoved(object? sender, PointerEventArgs e)
    {
        Debug.WriteLine("Moved");
    }

    private void PointerGestureRecognizer_OnPointerReleased(object? sender, PointerEventArgs e)
    {
        Debug.WriteLine("Released");
    }
}

What you will see is that on iOS the debug messages are seen in the logs, while on Android those events are never received. I believe this is related to the fix in 10.0.5 and here is a link to the original issue that was filed: https://github.com/dotnet/maui/releases/tag/10.0.50. If there is a known work around please let me know otherwise, we can wait until ESRI catches up to NET 10 and those control versions.

[dotMorten]

@jshafferman-lt are you saying this was working for you prior to the 10.0.50 release?

The maps sdk handles pointer events at a very low level at the native Android views which sits below Maui. And because the map control handles these events they are likely not bubbling up to the Maui gestures recognizers. This is pretty typical behavior with input events (it works on iOS because we use gesture recognizers there instead of individual pointer events so we don’t prevent those from bubbling up)

Can you share what scenario you’re trying to build with these events? It might help us better understand the right solution to solve this

[jshafferman-lt]

@dotMorten The PointerGestureRecgonizer works as expected for iOS at the current moment. On Android it does not work as expected. I believe that Android is not working due to the issues that were fixed in 10.0.5. After looking through the ESRI docs and nuget packages, it appears that the components that ESRI are built on are still on NET 9 (correct me if I am wrong). Due to that fact and the known bug fix that is in 10.0.5, I wouldn't anticipate this working until ESRI is on at least 10.0.5 for its MAUI controls.

The scenario that we are wanting to use this is when we want to drag a GraphicsOverlay based on a tap and/or hold, then dragging your finger across the screen. The best way that I see that being achievable is by using the pointer gesture recognizer (which works fine for iOS) but fails on Android. We currently use MrGestures for Android but would like to move away since that is no longer supported. If you have better suggestions or on how to achieve what we are wanting, I am all ears!

FWIW, we are on the latest ESRI and MAUI controls (10.0.5). I can supply some samples of code if necessary

[dotMorten]

The Esri MapView control isn't actually using MAUI for anything gesture related. It's using native android view code (the maui control is just a thin wrapper around a native android mapview control). So any changes to gesture code in MAUI wouldn't affect the Esri gesture code. Looking at the fix you're referring to, I don't think that has any effect. You can test yourself by setting MauiVersion to 10.0.0 <MauiVersion>10.0.0</MauiVersion> in your project settings, which would pull in the first 10.0 release before 10.0.5.

The reason gesture recognizers doesn't work is still the same reason as explained above.

Wrt dragging graphics around, have you considered just using the GeometryEditor for this? You can pre-select the geometry and only enable move in the editor tool to get that behavior out of the box.

[jshafferman-lt]

@dotMorten I can take a peak at using the geometry editor. The only concern, would be how to have a seamless transition for the end user. Currently, it would be a long press, the item is selected, then while dragging the selected graphic, the overlay would update. I would like to keep the UX flow, however, if the editor can work out of the box without much finagling, then I am open to seeing how that might feel to the user. Is there way to achieve that seamless interaction without making them use the editor tool? FYI, I am somewhat naive with the editor tool so if I am off the mark, please feel free to correct me