How to get file info from mobile app

How to get the file creation date in the mobile application when downloading it from the gallery or from the file system?

Here is my code:

onFileTypePickerItemTap: function(el, index, target, record) {
    var source = record.get("Source");
    switch (source) {
        case Terrasoft.Configuration.FilesAndLinksDetailFileSources.Gallery:
            Terrasoft.Camera.captureFromGallery({
                success: this.onCameraCapture,
                failure: this.onFail,
                scope: this
            });
            break;
            ...
        }
    }
},

onCameraCapture: function(fileName, url) {

    Terrasoft.Mask.show({message: Terrasoft.LocalizableStrings.UploadingFile});
    if(fileName && url) {
        this.saveFile(fileName, url);
    } else {
        Terrasoft.Mask.hide();
    }
}