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using System;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using Android.Content.Res;
using Android.Graphics;
using Android.Graphics.Drawables;
using Android.Support.V4.Content;
using Path = System.IO.Path;
namespace Xamarin.Forms.Platform.Android
{
public static class ResourceManager
{
public static Type DrawableClass { get; set; }
public static Type ResourceClass { get; set; }
public static Bitmap GetBitmap(this Resources resource, string name)
{
return BitmapFactory.DecodeResource(resource, IdFromTitle(name, DrawableClass));
}
public static Task<Bitmap> GetBitmapAsync(this Resources resource, string name)
{
return BitmapFactory.DecodeResourceAsync(resource, IdFromTitle(name, DrawableClass));
}
public static Drawable GetDrawable(this Resources resource, string name)
{
int id = IdFromTitle(name, DrawableClass);
if (id == 0)
{
Log.Warning("Could not load image named: {0}", name);
return null;
}
return ContextCompat.GetDrawable(Forms.Context, id);
}
public static int GetDrawableByName(string name)
{
return IdFromTitle(name, DrawableClass);
}
public static int GetResourceByName(string name)
{
return IdFromTitle(name, ResourceClass);
}
public static void Init(Assembly masterAssembly)
{
DrawableClass = masterAssembly.GetTypes().FirstOrDefault(x => x.Name == "Drawable");
ResourceClass = masterAssembly.GetTypes().FirstOrDefault(x => x.Name == "Id");
}
internal static int IdFromTitle(string title, Type type)
{
string name = Path.GetFileNameWithoutExtension(title);
int id = GetId(type, name);
return id; // Resources.System.GetDrawable (Resource.Drawable.dashboard);
}
static int GetId(Type type, string propertyName)
{
FieldInfo[] props = type.GetFields();
FieldInfo prop = props.Select(p => p).FirstOrDefault(p => p.Name == propertyName);
if (prop != null)
return (int)prop.GetValue(type);
return 0;
}
}
}
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