/// <summary>
/// Tries to find a file system path for given Uri. Note that this isn't always possible,
/// since the content referenced by the Uri may not be stored on a file system, but is
/// returned by the responsible app by using a ContentProvider. In this case, the method
/// returns null, and access to the content is only possible by opening a stream.
/// </summary>
/// <param name="context">Android context to access content resolver</param>
/// <param name="uri">Uri to use</param>
/// <returns>full file system path, or null</returns>
public static string GetPath(Context context, Android.Net.Uri uri)
{
bool isKitKat = Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat;
// DocumentProvider
if (isKitKat && DocumentsContract.IsDocumentUri(context, uri))
{
// ExternalStorageProvider
if (IsExternalStorageDocument(uri))
{
var docId = DocumentsContract.GetDocumentId(uri);
string[] split = docId.Split(':');
var type = split[0];
if ("primary".Equals(type, StringComparison.OrdinalIgnoreCase))
{
return(Android.OS.Environment.ExternalStorageDirectory + "/" + split[1]);
}
// TODO handle non-primary volumes
}
else if (IsDownloadsDocument(uri))
{
// DownloadsProvider
string id = DocumentsContract.GetDocumentId(uri);
if (!string.IsNullOrEmpty(id) &&
id.StartsWith("raw:"))
{
return(id.Substring(4));
}
if (!long.TryParse(id, out long parseId))
{
return(null);
}
string[] contentUriPrefixesToTry = new string[]
{
"content://downloads/public_downloads",
"content://downloads/my_downloads"
};
foreach (string contentUriPrefix in contentUriPrefixesToTry)
{
Android.Net.Uri contentUri = ContentUris.WithAppendedId(
Android.Net.Uri.Parse(contentUriPrefix), parseId);
try
{
var path = GetDataColumn(context, contentUri, null, null);
if (path != null)
{
return(path);
}
}
catch (Exception)
{
// ignore exception; path can't be retrieved using ContentResolver
}
}
}
else if (IsMediaDocument(uri))
{
// MediaProvider
var docId = DocumentsContract.GetDocumentId(uri);
string[] split = docId.Split(':');
var type = split[0];
Android.Net.Uri contentUri = null;
if ("image".Equals(type))
{
contentUri = MediaStore.Images.Media.ExternalContentUri;
}
else if ("video".Equals(type))
{
contentUri = MediaStore.Video.Media.ExternalContentUri;
}
else if ("audio".Equals(type))
{
contentUri = MediaStore.Audio.Media.ExternalContentUri;
}
var selection = "_id=?";
var selectionArgs = new string[]
{
split[1]
};
return(GetDataColumn(context, contentUri, selection, selectionArgs));
}
}
// MediaStore (and general)
if (IsMediaStore(uri.Scheme))
{
return(GetDataColumn(context, uri, null, null));
}
else if ("file".Equals(uri.Scheme, StringComparison.OrdinalIgnoreCase))
{
return(uri.Path);
}
return(null);
}
private string GetPathUri(Android.Net.Uri oUri)
{
ICursor oImgCursor = null;
string sPathUri = null;
try
{
oImgCursor = CrossCurrentActivity.Current.Activity.ContentResolver.Query(oUri, null, null, null);
oImgCursor.MoveToFirst();
int iIndex = oImgCursor.GetColumnIndex(MediaStore.Images.ImageColumns.Data);
if (iIndex != -1)
{
//old devices;
sPathUri = oImgCursor.GetString(iIndex);
}
else
{
//new devices;
oImgCursor = null;
var oDocId = DocumentsContract.GetDocumentId(oUri);
var oDoc = oDocId.Split(":");
var oId = oDoc[1];
var oSelect = MediaStore.Images.ImageColumns.Id + "=?";
var oDataConst = MediaStore.Images.ImageColumns.Data;
var oProjections = new string[] { oDataConst };
var oInternalUri = MediaStore.Images.Media.InternalContentUri;
var oExternalUri = MediaStore.Images.Media.ExternalContentUri;
if (oDoc[0].Equals("video"))
{
oSelect = MediaStore.Video.VideoColumns.Id + "=?";
oDataConst = MediaStore.Video.VideoColumns.Data;
oProjections = new string[] { oDataConst };
}
oImgCursor = CrossCurrentActivity.Current.Activity.ContentResolver.Query(oInternalUri, oProjections,
oSelect, new string[] { oId }, null);
if (oImgCursor.Count == 0)
{
//not found in internal storage
oImgCursor = CrossCurrentActivity.Current.Activity.ContentResolver.Query(oExternalUri, oProjections,
oSelect, new string[] { oId }, null);
var oColData = oImgCursor.GetColumnIndexOrThrow(oDataConst);
oImgCursor.MoveToFirst();
sPathUri = oImgCursor.GetString(oColData);
}
}
}
catch (Exception ex)
{
Toast.MakeText(Xamarin.Forms.Forms.Context, "Error Uri: " + ex.Message.ToString(), ToastLength.Long).Show();
}
finally
{
oImgCursor.Close();
oImgCursor.Dispose();
}
return(sPathUri);
}
public static string GetPath(Context context, Android.Net.Uri uri)
{
var isKitKat = Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat;
// DocumentProvider
if (isKitKat && DocumentsContract.IsDocumentUri(context, uri))
{
// ExternalStorageProvider
if (IsExternalStorageDocument(uri))
{
var docId = DocumentsContract.GetDocumentId(uri);
var split = docId.Split(':');
var type = split [0];
if ("primary".Equals(type, StringComparison.OrdinalIgnoreCase))
{
return(Android.OS.Environment.ExternalStorageDirectory + "/" + split [1]);
}
// TODO handle non-primary volumes
}
// DownloadsProvider
else if (IsDownloadsDocument(uri))
{
var id = DocumentsContract.GetDocumentId(uri);
var contentUri = ContentUris.WithAppendedId(
Android.Net.Uri.Parse("content://downloads/public_downloads"), long.Parse(id));
return(GetDataColumn(context, contentUri, null, null));
}
// MediaProvider
else if (IsMediaDocument(uri))
{
var docId = DocumentsContract.GetDocumentId(uri);
var split = docId.Split(':');
var type = split [0];
Android.Net.Uri contentUri = null;
if ("image".Equals(type))
{
contentUri = MediaStore.Images.Media.ExternalContentUri;
}
else if ("video".Equals(type))
{
contentUri = MediaStore.Video.Media.ExternalContentUri;
}
else if ("audio".Equals(type))
{
contentUri = MediaStore.Audio.Media.ExternalContentUri;
}
const string selection = "_id=?";
var selectionArgs = new[] {
split[1]
};
return(GetDataColumn(context, contentUri, selection, selectionArgs));
}
}
// MediaStore (and general)
else if ("content".Equals(uri.Scheme, StringComparison.OrdinalIgnoreCase))
{
return(GetDataColumn(context, uri, null, null));
}
// File
else if ("file".Equals(uri.Scheme, StringComparison.OrdinalIgnoreCase))
{
return(uri.Path);
}
return(null);
}
/**
* Method for return file path of Gallery image
*
* @param context
* @param uri
* @return path of the selected image file from gallery
*/
public static string GetPath(Context context, Android.Net.Uri uri)
{
//check here to KITKAT or new version
bool isKitKat = Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat;
// DocumentProvider
if (isKitKat && DocumentsContract.IsDocumentUri(context, uri))
{
// ExternalStorageProvider
if (IsExternalStorageDocument(uri))
{
string docId = DocumentsContract.GetDocumentId(uri);
string[] split = docId.Split(':');
string type = split[0];
if ("primary".Equals(type, System.StringComparison.OrdinalIgnoreCase))
{
return(Android.OS.Environment.ExternalStorageDirectory + "/" + split[1]);
}
}
// DownloadsProvider
else if (IsDownloadsDocument(uri))
{
string id = DocumentsContract.GetDocumentId(uri);
Android.Net.Uri contentUri = ContentUris.WithAppendedId(Android.Net.Uri.Parse("content://downloads/public_downloads"), long.Parse(id));
return(GetDataColumn(context, contentUri, null, null));
}
// MediaProvider
else if (IsMediaDocument(uri))
{
string docId = DocumentsContract.GetDocumentId(uri);
string[] split = docId.Split(':');
string type = split[0];
Android.Net.Uri contentUri = null;
if ("image".Equals(type))
{
contentUri = MediaStore.Images.Media.ExternalContentUri;
}
else if ("video".Equals(type))
{
contentUri = MediaStore.Video.Media.ExternalContentUri;
}
else if ("audio".Equals(type))
{
contentUri = MediaStore.Audio.Media.ExternalContentUri;
}
string selection = "_id=?";
string[] selectionArgs = new string[] { split[1] };
return(GetDataColumn(context, contentUri, selection, selectionArgs));
}
}
// MediaStore (and general)
else if ("content".Equals(uri.Scheme, System.StringComparison.OrdinalIgnoreCase))
{
// Return the remote address
if (IsGooglePhotosUri(uri))
{
return(uri.LastPathSegment);
}
if (IsGoogleDocUri(uri))
{
return(uri.LastPathSegment);
}
return(GetDataColumn(context, uri, null, null));
}
// File
else if ("file".Equals(uri.Scheme, System.StringComparison.OrdinalIgnoreCase))
{
if (IsGoogleDocUri(uri))
{
return(uri.LastPathSegment);
}
return(uri.Path);
}
return(null);
}
static string ResolveDocumentPath(AndroidUri uri)
{
Debug.WriteLine($"Trying to resolve document URI: '{uri}'");
var docId = DocumentsContract.GetDocumentId(uri);
var docIdParts = docId?.Split(':');
if (docIdParts == null || docIdParts.Length == 0)
{
return(null);
}
if (uri.Authority.Equals(UriAuthorityExternalStorage, StringComparison.OrdinalIgnoreCase))
{
Debug.WriteLine($"Resolving external storage URI: '{uri}'");
if (docIdParts.Length == 2)
{
var storageType = docIdParts[0];
var uriPath = docIdParts[1];
// This is the internal "external" memory, NOT the SD Card
if (storageType.Equals(storageTypePrimary, StringComparison.OrdinalIgnoreCase))
{
#pragma warning disable CS0618 // Type or member is obsolete
var root = global::Android.OS.Environment.ExternalStorageDirectory.Path;
#pragma warning restore CS0618 // Type or member is obsolete
return(Path.Combine(root, uriPath));
}
// TODO: support other types, such as actual SD Cards
}
}
else if (uri.Authority.Equals(UriAuthorityDownloads, StringComparison.OrdinalIgnoreCase))
{
Debug.WriteLine($"Resolving downloads URI: '{uri}'");
// NOTE: This only really applies to older Android vesions since the privacy changes
if (docIdParts.Length == 2)
{
var storageType = docIdParts[0];
var uriPath = docIdParts[1];
if (storageType.Equals(storageTypeRaw, StringComparison.OrdinalIgnoreCase))
{
return(uriPath);
}
}
// ID could be "###" or "msf:###"
var fileId = docIdParts.Length == 2
? docIdParts[1]
: docIdParts[0];
foreach (var prefix in contentUriPrefixes)
{
var uriString = prefix + "/" + fileId;
var contentUri = AndroidUri.Parse(uriString);
if (GetDataFilePath(contentUri) is string filePath)
{
return(filePath);
}
}
}
else if (uri.Authority.Equals(UriAuthorityMedia, StringComparison.OrdinalIgnoreCase))
{
Debug.WriteLine($"Resolving media URI: '{uri}'");
if (docIdParts.Length == 2)
{
var storageType = docIdParts[0];
var uriPath = docIdParts[1];
AndroidUri contentUri = null;
if (storageType.Equals(storageTypeImage, StringComparison.OrdinalIgnoreCase))
{
contentUri = MediaStore.Images.Media.ExternalContentUri;
}
else if (storageType.Equals(storageTypeVideo, StringComparison.OrdinalIgnoreCase))
{
contentUri = MediaStore.Video.Media.ExternalContentUri;
}
else if (storageType.Equals(storageTypeAudio, StringComparison.OrdinalIgnoreCase))
{
contentUri = MediaStore.Audio.Media.ExternalContentUri;
}
if (contentUri != null && GetDataFilePath(contentUri, $"{MediaStore.MediaColumns.Id}=?", new[] { uriPath }) is string filePath)
{
return(filePath);
}
}
}
Debug.WriteLine($"Unable to resolve document URI: '{uri}'");
return(null);
}
