How do I get the CPU temperature?

Question

I know it\'s somehow possible to get the CPU\'s temperature because I downloaded an app that does it in an unrooted device. How is it done?

edit: The application is

Answer 1

The temperature sensor even if exists if for the battery temperature and CPU temperature.

Most phones only include CPU temperature measurement sensor Sensor.TYPE_TEMPERATURE which is deprecated

You should use Sensor.TYPE_AMBIENT_TEMPERATURE which I don't think many phones have.

For More information please go through this

http://developer.android.com/reference/android/hardware/Sensor.html#TYPE_AMBIENT_TEMPERATURE