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MvvmLight.Platform.AndroidX Library #81

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MvvmLight.Platform.AndroidX Library #81

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acbe84b
Merge pull request #1 from gianlucaparadise/recycler-getItemViewType-…
gianlucaparadise Mar 19, 2018
c53b85e
Added MvvmLight.Platform.AndroidX project
gianlucaparadise Jan 16, 2020
00a0a1c
Updated AndroidX dependencies to stable version
gianlucaparadise Jul 2, 2020
a7f0017
Preparing to release
gianlucaparadise Aug 15, 2020
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50 changes: 50 additions & 0 deletions GalaSoft.MvvmLight/GalaSoft.MvvmLight (VS2017).sln
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Expand Up @@ -33,6 +33,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GalaSoft.MvvmLight.Platform
EndProject
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Expand Down Expand Up @@ -741,6 +743,54 @@ Global
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HideSolutionNode = FALSE
Expand Down
41 changes: 41 additions & 0 deletions GalaSoft.MvvmLight/GalaSoft.MvvmLight.AndroidSupport/Resources/Resource.Designer.cs
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115 changes: 115 additions & 0 deletions GalaSoft.MvvmLight/GalaSoft.MvvmLight.AndroidX/GalaSoft.MvvmLight.Platform.AndroidX.csproj
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="..\packages\Xamarin.AndroidX.Migration.1.0.6.1\build\monoandroid90\Xamarin.AndroidX.Migration.props" Condition="Exists('..\packages\Xamarin.AndroidX.Migration.1.0.6.1\build\monoandroid90\Xamarin.AndroidX.Migration.props')" />
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<ItemGroup>
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<Reference Include="mscorlib" />
<Reference Include="System" />
<Reference Include="System.Core" />
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<Reference Include="Xamarin.AndroidX.Annotation">
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<HintPath>..\packages\Xamarin.AndroidX.CustomView.1.0.0.1\lib\monoandroid90\Xamarin.AndroidX.CustomView.dll</HintPath>
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<Project>{A5B7741D-E331-438C-B3BF-596B048DB622}</Project>
<Name>GalaSoft.MvvmLight.Platform (Android)</Name>
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<ItemGroup>
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<Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
Other similar extension points exist, see Microsoft.Common.targets.
<Target Name="BeforeBuild">
</Target>
<Target Name="AfterBuild">
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-->
<Import Project="..\packages\Xamarin.AndroidX.MultiDex.2.0.1.1\build\monoandroid90\Xamarin.AndroidX.MultiDex.targets" Condition="Exists('..\packages\Xamarin.AndroidX.MultiDex.2.0.1.1\build\monoandroid90\Xamarin.AndroidX.MultiDex.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.Migration.1.0.6.1\build\monoandroid90\Xamarin.AndroidX.Migration.targets" Condition="Exists('..\packages\Xamarin.AndroidX.Migration.1.0.6.1\build\monoandroid90\Xamarin.AndroidX.Migration.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.Annotation.1.1.0.1\build\monoandroid90\Xamarin.AndroidX.Annotation.targets" Condition="Exists('..\packages\Xamarin.AndroidX.Annotation.1.1.0.1\build\monoandroid90\Xamarin.AndroidX.Annotation.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.Arch.Core.Common.2.1.0.1\build\monoandroid90\Xamarin.AndroidX.Arch.Core.Common.targets" Condition="Exists('..\packages\Xamarin.AndroidX.Arch.Core.Common.2.1.0.1\build\monoandroid90\Xamarin.AndroidX.Arch.Core.Common.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.Collection.1.1.0.1\build\monoandroid90\Xamarin.AndroidX.Collection.targets" Condition="Exists('..\packages\Xamarin.AndroidX.Collection.1.1.0.1\build\monoandroid90\Xamarin.AndroidX.Collection.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.Lifecycle.Common.2.2.0.1\build\monoandroid90\Xamarin.AndroidX.Lifecycle.Common.targets" Condition="Exists('..\packages\Xamarin.AndroidX.Lifecycle.Common.2.2.0.1\build\monoandroid90\Xamarin.AndroidX.Lifecycle.Common.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.Lifecycle.Runtime.2.2.0.1\build\monoandroid90\Xamarin.AndroidX.Lifecycle.Runtime.targets" Condition="Exists('..\packages\Xamarin.AndroidX.Lifecycle.Runtime.2.2.0.1\build\monoandroid90\Xamarin.AndroidX.Lifecycle.Runtime.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.VersionedParcelable.1.1.1.1\build\monoandroid90\Xamarin.AndroidX.VersionedParcelable.targets" Condition="Exists('..\packages\Xamarin.AndroidX.VersionedParcelable.1.1.1.1\build\monoandroid90\Xamarin.AndroidX.VersionedParcelable.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.Core.1.2.0.1\build\monoandroid90\Xamarin.AndroidX.Core.targets" Condition="Exists('..\packages\Xamarin.AndroidX.Core.1.2.0.1\build\monoandroid90\Xamarin.AndroidX.Core.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.CustomView.1.0.0.1\build\monoandroid90\Xamarin.AndroidX.CustomView.targets" Condition="Exists('..\packages\Xamarin.AndroidX.CustomView.1.0.0.1\build\monoandroid90\Xamarin.AndroidX.CustomView.targets')" />
<Import Project="..\packages\Xamarin.AndroidX.RecyclerView.1.1.0.1\build\monoandroid90\Xamarin.AndroidX.RecyclerView.targets" Condition="Exists('..\packages\Xamarin.AndroidX.RecyclerView.1.1.0.1\build\monoandroid90\Xamarin.AndroidX.RecyclerView.targets')" />
</Project>
148 changes: 148 additions & 0 deletions GalaSoft.MvvmLight/GalaSoft.MvvmLight.AndroidX/Helpers/CachingViewHolder.cs
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using System;
using System.Collections.Generic;
using Android.Runtime;
using AndroidX.RecyclerView.Widget;
using Android.Views;

namespace GalaSoft.MvvmLight.Helpers
{
/// <summary>
/// An extension of <see cref="RecyclerView.ViewHolder"/> optimized for usage with the
/// <see cref="ObservableRecyclerAdapter{TItem, THolder}"/>. Provides additional features
/// that can be used with the MVVM Light data binding system.
/// </summary>
////[ClassInfo(typeof(ObservableAdapter<T>))]
public class CachingViewHolder : RecyclerView.ViewHolder
{
private readonly Dictionary<object, Binding> _bindings = new Dictionary<object, Binding>();
private readonly Dictionary<int, View> _cachedViews = new Dictionary<int, View>();
private Action<int, View> _clickCallback;

/// <summary>
/// A callback that will be executed when the corresponding item is clicked or tapped
/// by the user.
/// </summary>
public Action<int, View> ClickCallback
{
get
{
return _clickCallback;
}
set
{
if (value == null)
{
ItemView.Click -= OnViewClick;
}
else
{
ItemView.Click += OnViewClick;
}

_clickCallback = value;
}
}

/// <summary>
/// Initializes an instance of this class. In most cases this method
/// is not used by the developer.
/// </summary>
/// <param name="javaReference"></param>
/// <param name="transfer"></param>
public CachingViewHolder(IntPtr javaReference, JniHandleOwnership transfer)
: base(javaReference, transfer)
{
}

/// <summary>
/// Initializes an instance of this class.
/// </summary>
/// <param name="itemView">The view that this holder is attached to.</param>
public CachingViewHolder(View itemView)
: base(itemView)
{
}

/// <summary>
/// Detaches and removes a binding from this holder.
/// Use this method (in case a view is getting recycled) to clean up
/// existing bindings before attaching new ones. The binding that needs
/// to be detached must have been added to the holder using the <see cref="SaveBinding"/> method.
/// </summary>
/// <param name="key">The key corresponding to the binding to detach and delete. This is the
/// same key that was used in the <see cref="SaveBinding"/> method.</param>
/// <returns>The binding that has been detached and deleted, in case further processing
/// is necessary/</returns>
public Binding DeleteBinding(object key)
{
lock (_bindings)
{
if (_bindings.ContainsKey(key))
{
var binding = _bindings[key];
binding.Detach();
_bindings.Remove(key);
return binding;
}

return null;
}
}

/// <summary>
/// Explores the attached view and returns the UI element corresponding
/// to the viewId. If no element is found with this ID, the method returns null.
/// </summary>
/// <typeparam name="TView">The type of the view to be returned.</typeparam>
/// <param name="viewId">The ID of the subview that needs to be retrieved.</param>
/// <returns>The sub view corresponding to the viewId, or null if no corresponding sub view is found.</returns>
public TView FindCachedViewById<TView>(int viewId)
where TView : View
{
if (_cachedViews.ContainsKey(viewId))
{
return (TView)_cachedViews[viewId];
}

var view = ItemView.FindViewById<TView>(viewId);
_cachedViews.Add(viewId, view);
return view;
}

/// <summary>
/// Saves a binding between a element of the view and an element of the data item
/// represented by the view.
/// If the view is getting recycled, the binding should be deleted using the
/// <see cref="DeleteBinding"/> method.
/// </summary>
/// <param name="key">The key used to retriev the binding later. Typically
/// the key is the view to which the binding is attached (if there is only
/// one binding for this view).</param>
/// <param name="binding">The binding to be saved.</param>
public void SaveBinding(object key, Binding binding)
{
lock (_bindings)
{
if (_bindings.ContainsKey(key))
{
_bindings[key].Detach();
_bindings[key] = binding;
}
else
{
_bindings.Add(key, binding);
}
}
}

private void OnViewClick(object sender, EventArgs e)
{
var position = AdapterPosition;

if (position != RecyclerView.NoPosition)
{
_clickCallback?.Invoke(position, ItemView);
}
}
}
}
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