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Android GifImageView custom renderer for Xamarin Forms
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namespace LakeShore.Sources.Core.Instrument | |
{ | |
using Xamarin.Forms; | |
public class GifImageView : View | |
{ | |
public static readonly BindableProperty SourceProperty = BindableProperty.Create( | |
propertyName: nameof(Source), | |
returnType: typeof(string), | |
declaringType: typeof(GifImageView), | |
defaultValue: string.Empty); | |
public string Source | |
{ | |
get { return (string)this.GetValue(SourceProperty); } | |
set { this.SetValue(SourceProperty, value); } | |
} | |
} | |
} |
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using LakeShore.Sources.Core.Instrument; | |
using LakeShore.Sources.Droid.Instrument.CustomRenderers; | |
using Xamarin.Forms; | |
[assembly: ExportRenderer(typeof(GifImageView), typeof(GifImageViewCustomRenderer))] | |
namespace LakeShore.Sources.Droid.Instrument.CustomRenderers | |
{ | |
using System.ComponentModel; | |
using System.IO; | |
using LakeShore.Sources.Core.Instrument; | |
using Xamarin.Forms.Platform.Android; | |
using AGifImageView = Felipecsl.GifImageViewLibrary.GifImageView; | |
public class GifImageViewCustomRenderer : ViewRenderer<GifImageView, AGifImageView> | |
{ | |
public GifImageViewCustomRenderer() | |
{ | |
this.AutoPackage = false; | |
} | |
protected override void OnElementChanged(ElementChangedEventArgs<GifImageView> e) | |
{ | |
base.OnElementChanged(e); | |
if (this.Control == null) | |
{ | |
this.SetNativeControl(new AGifImageView(this.Context)); | |
this.SetSourceAndAnimate(); | |
} | |
} | |
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e) | |
{ | |
base.OnElementPropertyChanged(sender, e); | |
if (e.PropertyName == nameof(GifImageView.Source) && this.Control != null) | |
{ | |
this.SetSourceAndAnimate(); | |
} | |
} | |
private void SetSourceAndAnimate() | |
{ | |
try | |
{ | |
byte[] bytes; | |
using (var stream = new MemoryStream()) | |
{ | |
this.Context.Assets.Open(this.Element.Source).CopyTo(stream); | |
bytes = stream.ToArray(); | |
} | |
this.Control.SetBytes(bytes); | |
this.Control.StartAnimation(); | |
} | |
catch (Java.IO.IOException ex) | |
{ | |
Android.Util.Log.Error(nameof(GifImageViewCustomRenderer), ex, $"Failed to open source {this.Element.Source}"); | |
} | |
} | |
} | |
} |
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