ArcGis Map does not disapear in navigation Xamarin.Forms - xamarin.forms

Question

Hello guys :D I am having a problem with the android part of the Xamarin.Forms
When I Navigate from a AbsoluteLayout with a Map and TabbleView (enter image description here) to a Grid with only a Map, the Map from the previous page stays static on top of the second one(enter image description here). This problem does not manifest in iOS, only in Android. If any of you guys know the problem please tell me so I can quickly fix :D
Page with First Map
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="SGPI.Intervencao.CriarIntervencao"
xmlns:local="clr-namespace:SGPI.Shared"
xmlns:esriUI="clr-namespace:Esri.ArcGISRuntime.Xamarin.Forms;assembly=Esri.ArcGISRuntime.Xamarin.Forms"
Padding="5,5">
<ContentPage.Resources>
<ResourceDictionary>
<local:MapViewModel x:Key="MapViewModel" />
</ResourceDictionary>
</ContentPage.Resources>
<AbsoluteLayout>
<esriUI:MapView Map="{Binding Map, Source={StaticResource MapViewModel}}" x:Name="map" AbsoluteLayout.LayoutBounds="0,0, 1, 0.6" AbsoluteLayout.LayoutFlags="All"/>
<TableView Intent="Form" HasUnevenRows="True" AbsoluteLayout.LayoutBounds="0,1, 1, 0.4" AbsoluteLayout.LayoutFlags="All">
<TableRoot>
<TableSection Title="Information">
<EntryCell Label="Nome" Text="{Binding Name}" Placeholder="Nome"/>
<EntryCell Label="Codigo" Text="{Binding Code}" Placeholder="Codigo"/>
<ViewCell>
<StackLayout Orientation="Horizontal">
<Label Text="Status" HorizontalOptions="Start" VerticalOptions="Center"/>
<Picker x:Name="pick" SelectedIndex="{Binding Index}" SelectedItem="{Binding Status}" Title="Status" HorizontalOptions="FillAndExpand">
<Picker.Items>
<x:String>Em Construção</x:String>
<x:String>Construido</x:String>
</Picker.Items>
</Picker>
</StackLayout>
</ViewCell>
<ViewCell>
<Button Image="editMap.png" Clicked="Button_Clicked" />
</ViewCell>
</TableSection>
</TableRoot>
</TableView>
</AbsoluteLayout>
<ContentPage.ToolbarItems>
<ToolbarItem Icon="dan.png" Order="Primary" x:Name="done" Clicked="Done"/>
</ContentPage.ToolbarItems>
Code Behind
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
namespace SGPI.Intervencao
{
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class CriarIntervencao : ContentPage
{
public event EventHandler<IntervencaoClass> IntervencaoAdded;
public event EventHandler<IntervencaoClass> IntervencaoUpdated;
public CriarIntervencao(IntervencaoClass intervencao)
{
if(intervencao == null)
throw new ArgumentNullException(nameof(intervencao));
InitializeComponent();
BindingContext = new IntervencaoClass
{
Code = intervencao.Code,
Name = intervencao.Name,
Status = intervencao.Status,
Index = intervencao.Index,
Id = intervencao.Id,
Polygons = intervencao.Polygons
};
if(intervencao.Polygons != null)
map.GraphicsOverlays.Add(intervencao.Polygons);
}
private async void Done(object sender, EventArgs e)
{
var intervencao = BindingContext as IntervencaoClass;
if (filled())
{
await DisplayAlert("Erro", "Preenche tudo", "OK");
return;
}
map.GraphicsOverlays.Clear();
if (!intervencao.Id.HasValue)
{
intervencao.Id = 1;
IntervencaoAdded?.Invoke(this, intervencao);
}
else
{
IntervencaoUpdated?.Invoke(this, intervencao);
}
await Navigation.PopAsync();
}
public bool filled()
{
var intervencao = BindingContext as IntervencaoClass;
return String.IsNullOrEmpty(intervencao.Name) || String.IsNullOrEmpty(intervencao.Code) || pick.SelectedIndex == -1;
}
private async void Button_Clicked(object sender, EventArgs e)
{
map.GraphicsOverlays.Clear();
var page = new MapPages.MapPage((BindingContext as IntervencaoClass).Polygons);
page.AcceptedMap += (send, graphics) => {
var intervencao = BindingContext as IntervencaoClass;
intervencao.Polygons = graphics;
map.GraphicsOverlays.Add(graphics);
Navigation.PopAsync();
};
await Navigation.PushAsync(page);
}
}
}
Second Page
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:SGPI.Shared"
xmlns:esriUI="clr-namespace:Esri.ArcGISRuntime.Xamarin.Forms;assembly=Esri.ArcGISRuntime.Xamarin.Forms"
x:Class="SGPI.MapPages.MapPage">
<ContentPage.Resources>
<ResourceDictionary>
<local:MapViewModel x:Key="MapViewModel" />
</ResourceDictionary>
</ContentPage.Resources>
<Grid>
<esriUI:MapView Map="{Binding Map, Source={StaticResource MapViewModel}}" x:Name="map" GeoViewTapped="Map_GeoViewTapped"/>
</Grid>
<ContentPage.ToolbarItems>
<ToolbarItem Icon="dan.png" Clicked="Done"/>
</ContentPage.ToolbarItems>
</ContentPage>
Second Page Code Behind
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Symbology;
using System.Collections.Generic;
using Xamarin.Forms;
using Esri.ArcGISRuntime.UI;
using System;
using System.Threading;
namespace SGPI.MapPages
{
public partial class MapPage : ContentPage
{
public event EventHandler<GraphicsOverlay> AcceptedMap;
List<MapPoint> points;
static SimpleLineSymbol symbol = new SimpleLineSymbol()
{
Style = SimpleLineSymbolStyle.Dash,
Color = System.Drawing.Color.Black,
Width = 1
};
static SimpleMarkerSymbol marker = new SimpleMarkerSymbol()
{
Color = System.Drawing.Color.Pink,
Outline = symbol,
Style = SimpleMarkerSymbolStyle.Diamond,
Size = 10
};
static SimpleLineSymbol line = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.CadetBlue, 1);
static SimpleFillSymbol fill = new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, System.Drawing.Color.Black, line);
public MapPage(GraphicsOverlay graphic)
{
InitializeComponent();
map.Map = new SGPI.Shared.MapViewModel().Map;
if(graphic == null)
graphic = new GraphicsOverlay();
map.GraphicsOverlays.Add(graphic);
points = new List<MapPoint>();
}
private Graphic AddPolygonInMap(MapPoint[] points)
{
var pointCollection = new PointCollection(points[0].SpatialReference);
foreach (MapPoint p in points)
pointCollection.Add(p);
var sPolygon = new Polygon(pointCollection);
return new Graphic(sPolygon, fill);
}
private void AddPointinMap(MapPoint point)
{
Graphic graphic = new Graphic(point, marker);
map.GraphicsOverlays[0].Graphics.Add(graphic);
}
private async void Map_GeoViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
var tolerance = 10d; // Use larger tolerance for touch
var maximumResults = 1; // Only return one graphic
var onlyReturnPopups = false; // Don't return only popups
// Use the following method to identify graphics in a specific graphics overlay
IdentifyGraphicsOverlayResult identifyResults = await map.IdentifyGraphicsOverlayAsync(
map.GraphicsOverlays[0],
e.Position,
tolerance,
onlyReturnPopups,
maximumResults);
// Check if we got results
if (identifyResults.Graphics.Count > 0)
{
// Make sure that the UI changes are done in the UI thread
Device.BeginInvokeOnMainThread(async () => {
await DisplayAlert("", "Tapped on graphic", "OK");
});
} else
{
points.Add(e.Location);
AddPointinMap(e.Location);
}
}
private async void Done(object sender, EventArgs e)
{
if(points.Count > 2) {
GraphicsOverlay graphics = new GraphicsOverlay();
graphics.Graphics.Add(AddPolygonInMap(points.ToArray()));
map.GraphicsOverlays.Add(graphics);
Thread.Sleep(500);
var accepted = await DisplayAlert("Aviso", "Este é o polígono certo?", "Sim", "Não");
if (accepted)
{
GraphicsOverlay graph = graphics;
map.GraphicsOverlays.Clear();
AcceptedMap?.Invoke(this, graph);
}
else
{
for(int i = 1; i < map.GraphicsOverlays.Count; i++)
map.GraphicsOverlays[i] = new GraphicsOverlay();
}
}
}
}
}