does anyone know what you have to do to get content assist working in Eclipse? Do you have to point to some file or folder maybe. I have checked in preferences and all those proposal tick boxes are checked so that isn't the problem and control_space brings up the content assist box but it says there are no default proposals. It did work for me with android until a couple weeks ago when I changed something or updated software but I can't remember what.
I had a similar problem a couple of weeks ago. And I followed this blog and this documentation.
Hope it works!