Hi,
Can You try as below, I haven't tested this code it just way to do.
<u:FileUploader
id="fileUploader"
name="myFileUpload"
uploadUrl="upload/"
tooltip="Upload your file to the local server"
uploadComplete="handleUploadComplete"
change="handleValueChange"
...
Controller.extend('FileUploaderComplez.Controller', {
handleValueChange: function(oEvent){
}
}