Here is a short video using Mister Glue to reattach a ceramic mug handle.  Apply the glue to one side only. Make sure that both surfaces are clean of any dust, dirt or old glue.  If you can get a snug fit the line where it was broken can be almost impossible to see.  Leave any glue that squeezes out long enough to be easily scraped off.  Too long and it will be too hard and too soon and it will smear.