Android Java File http URL upload app

I have been trying to develop a mini Android Java test app to upload a file to a server using an URL, but cannot seem to get anything working. The mobile phone will have a file in the download folder i.e. uploadfile.hex and we need to send it to the server via an URL i.e. http://10.10.0.1/uploadfile.hex.

So would like the following creating
1. One activity (see attached file)
2. Java code to upload the file (as selected in the textbox) and upload to the server with the url (as defined in the textbox)
3. Press the Upload button and it will upload the file
4. Ideally I would like a progress bar to show the file upload progress, but it's not necessary