As it comes to indoor location does have the possibility of using GPS.
Really? Do you have your own satellites inside?
I wonder what kind of sensor can use the Arduino to send this signal
Say what? Sensors don't send signals. Sensors respond to requests. Radios send things.
Had thought of Zigbee modules but I read that Android can not communicate with him
so I thought I bluetooth or wireless modules.
Well, XBees are wireless modules, and I thought we'd already ruled them out since the Android can't read them. Or most other wireless modules, either.
The idea is to get the location through triangulation measurement and signal modules.
The location of what? Triangulated relative to what?