Xamarin forms: Picture extension is not saving with path in android when do multiple photo selection

问题

I am following this article for Select Multiple Images From Gallery in Xamarin Forms.

I completed the feature in android part but the picture path contains only the picture name, extensions are missing when saving path.

To upload the image to the server I need the complete image name with extension. So how can I save the complete path of the selected images with the extension?

Following method capture the image path:

public String GetRealPathFromURI(Android.Net.Uri contentURI)
    {
        try
        {
            ICursor imageCursor = null;
            string fullPathToImage = "";

            imageCursor = ContentResolver.Query(contentURI, null, null, null, null);
            imageCursor.MoveToFirst();
            int idx = imageCursor.GetColumnIndex(MediaStore.Images.ImageColumns.Data);

            if (idx != -1)
            {
                fullPathToImage = imageCursor.GetString(idx);
            }
            else
            {
                ICursor cursor = null;
                var docID = DocumentsContract.GetDocumentId(contentURI);
                var id = docID.Split(':')[1];
                var whereSelect = MediaStore.Images.ImageColumns.Id + "=?";
                var projections = new string[] { MediaStore.Images.ImageColumns.Data };

                cursor = ContentResolver.Query(MediaStore.Images.Media.InternalContentUri, projections, whereSelect, new string[] { id }, null);
                if (cursor.Count == 0)
                {
                    cursor = ContentResolver.Query(MediaStore.Images.Media.ExternalContentUri, projections, whereSelect, new string[] { id }, null);
                }
                var colData = cursor.GetColumnIndexOrThrow(MediaStore.Images.ImageColumns.Data);
                cursor.MoveToFirst();
                fullPathToImage = cursor.GetString(colData);
            }
            return fullPathToImage;
        }
        catch (Exception ex)
        {
            Toast.MakeText(Xamarin.Forms.Forms.Context, "Unable to get path", ToastLength.Long).Show();
        }
        return null;
    }

回答1:

The extension(.png or .jpg) was missing not from the GetRealPathFromURI(), it happens in ImageHelpers.SaveFile(). So I save the filename to another variable from the path using Path.GetFileName() like below and pass the complete filename when call ImageHelpers.SaveFile().

var fileName = Path.GetFileName(picturepath);

来源：https://stackoverflow.com/questions/54249377/xamarin-forms-picture-extension-is-not-saving-with-path-in-android-when-do-mult

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