Android - required sensors?

Question

Is there a mandatory list of hardware on Android devices (e.g. magnetic field, distance)?

If not, which one is common?

Answer 1

These things are defined in the Android Compatibility Definition Document (CDD) .

Here is current. Check the hardware sensor section [7.3.].
As far as I can see, all sensors are optional.

Most devices are equipped with the following sensors:

• GPS
• Accelerometer
• Proximity sensor
• A magnetic field
• Light
• Gravity

(from an API point of view , some may be the same on a hardware basis)