My bathroom floor leaks after someone takes a shower, I took the ceiling tiles down to look at the drain not leaking at the drain, calked around the tub and floor let dry for 24 hours, stll leakes

You say bathroom floor... do you mean the floor or the shower itself. Big difference.

The shower should never leak... but the floor itself isn't designed for pools of standing water on it. If it's the latter, use shower mats to sock up the water if you MUST step out of the shower to dry off... if its actually the shower itself your pan and drain may be fine... but the wall is leaking at some point above the pan inside the shower... possibly from a cracked grout joint, etc...

What type of construction is the shower, is it ceramic tile or a fiberglass or Arcrylic assembly.