The type Chalo showed worked good for me. Just look for one that is not too cheesy.
I think you can find those these days, at home depot or Lowes, stores like that.
The trick for using them with a heavy bike is adjusting them exactly the right height, so the back wheel does still touch the ground, and supports at least half the weight of the bike. Put a quarter inch of something under the rear wheel, then snug up the hook on the front lightly, and screw to the wall.
If the wheel still hangs above the floor when you remove the quarter inch, then lower it another eighth. At some point you will get it perfect, the front wheel hanging snug, and the back wheel just touching enough to take some of the weight off the hook.