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re-select support for android tabbed page buttons (#1100)

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* re-select support for android tabbed page buttons

* applied Sane Person Technology (tm) to index check

* remove extra line
This commit is contained in:
Matt Portune 2020-10-01 14:16:37 -04:00 committed by GitHub
parent fd55cf6996
commit c6ac9376fc
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2 changed files with 61 additions and 0 deletions
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1
src/Android/Android.csproj
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@ -120,6 +120,7 @@
<Compile Include="Receivers\LockAlarmReceiver.cs" />
<Compile Include="Receivers\PackageReplacedReceiver.cs" />
<Compile Include="Renderers\CipherViewCellRenderer.cs" />
<Compile Include="Renderers\CustomTabbedRenderer.cs" />
<Compile Include="Renderers\ExtendedSliderRenderer.cs" />
<Compile Include="Renderers\CustomEditorRenderer.cs" />
<Compile Include="Renderers\CustomPickerRenderer.cs" />

60
src/Android/Renderers/CustomTabbedRenderer.cs Normal file
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@ -0,0 +1,60 @@
using Android.Content;
using Android.Views;
using Bit.Droid.Renderers;
using Google.Android.Material.BottomNavigation;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
using Xamarin.Forms.Platform.Android.AppCompat;
[assembly: ExportRenderer(typeof(TabbedPage), typeof(CustomTabbedRenderer))]
namespace Bit.Droid.Renderers
{
public class CustomTabbedRenderer : TabbedPageRenderer, BottomNavigationView.IOnNavigationItemReselectedListener
{
private TabbedPage _page;
public CustomTabbedRenderer(Context context) : base(context) { }
protected override void OnElementChanged(ElementChangedEventArgs<TabbedPage> e)
{
base.OnElementChanged(e);
if (e.NewElement != null)
{
_page = e.NewElement;
GetBottomNavigationView()?.SetOnNavigationItemReselectedListener(this);
}
else
{
_page = e.OldElement;
}
}
private BottomNavigationView GetBottomNavigationView()
{
for (var i = 0; i < ViewGroup.ChildCount; i++)
{
var childView = ViewGroup.GetChildAt(i);
if (childView is ViewGroup viewGroup)
{
for (var j = 0; j < viewGroup.ChildCount; j++)
{
var childRelativeLayoutView = viewGroup.GetChildAt(j);
if (childRelativeLayoutView is BottomNavigationView bottomNavigationView)
{
return bottomNavigationView;
}
}
}
}
return null;
}
async void BottomNavigationView.IOnNavigationItemReselectedListener.OnNavigationItemReselected(IMenuItem item)
{
if (_page?.CurrentPage?.Navigation != null && _page.CurrentPage.Navigation.NavigationStack.Count > 0)
{
await _page.CurrentPage.Navigation.PopToRootAsync();
}
}
}
}