public static string ToPhysicalPath(this Uri uri, Context ctx)
{
var isKitkat = Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat;
var isDocumentUri = DocumentsContract.IsDocumentUri(ctx, uri);
var isTreeUri = DocumentsContract.IsTreeUri(uri);
if (isKitkat && (isDocumentUri || isTreeUri))
{
var rootUri = isDocumentUri
? DocumentsContract.GetDocumentId(uri)
: DocumentsContract.GetTreeDocumentId(uri);
if (uri.Authority == "com.android.localstorage.documents")
{
return(rootUri);
}
if (uri.Authority == "com.android.externalstorage.documents")
{
var splitDocumentId = rootUri.Split(':');
var type = splitDocumentId[0];
if (string.Compare(type, "primary", StringComparison.InvariantCultureIgnoreCase) == 0)
{
return(Path.Combine(Android.OS.Environment.ExternalStorageDirectory.Path, splitDocumentId[1]));
}
// Handle non-primary
//! TODO: This is absolutely disgusting but android offers no easy way to obtain a path to a directory from an Uri to a directory.
//! I'm not even sure this is portable.
var contentUri = MediaStore.Files.GetContentUri(type);
var cursor = ctx.ContentResolver.Query(contentUri, null, null, null, null);
if (cursor != null && cursor.MoveToFirst())
{
var path = cursor.GetString(0);
cursor.Close();
return(path);
}
else
{
return("/storage/" + rootUri.Replace(':', '/'));
}
return(contentUri.ToPhysicalPath(ctx));
}
if (uri.Authority == "com.android.providers.downloads.documents")
{
var contentUri = ContentUris.WithAppendedId(Uri.Parse("content://downloads/public_downloads"), long.Parse(rootUri));
return(ctx.GetDataColumn(contentUri, MediaStore.MediaColumns.Data, null, null));
}
if (uri.Authority == "com.android.providers.media.documents")
{
var splitDocumentId = rootUri.Split(':');
var type = splitDocumentId[0];
Uri contentUri = null;
if ("image" == type)
{
contentUri = MediaStore.Images.Media.ExternalContentUri;
}
else if ("video" == type)
{
contentUri = MediaStore.Video.Media.ExternalContentUri;
}
else if ("audio" == type)
{
contentUri = MediaStore.Audio.Media.ExternalContentUri;
}
return(ctx.GetDataColumn(contentUri, MediaStore.MediaColumns.Data, "_id?=", splitDocumentId[1]));
}
}
// MediaStore and general
else if (uri.Scheme == "content")
{
if (uri.Authority == "com.google.android.apps.photos.content")
{
return(uri.LastPathSegment);
}
return(ctx.GetDataColumn(uri, MediaStore.MediaColumns.Data, null, null));
}
else if (uri.Scheme == "file")
{
return(uri.Path);
}
return("");
}