What is a Sensor in Android ?

A Sensor is a piece of Hardware that has been wired into device to feed data from the physical

world to applications. Applications use the sensor data to inform the user about the physical world,

to control game play,to do augmented reality,or to provide useful tools for working in the real world.

Some of the Sensor types that can appear in an Android device :

- Light Sensor.
- Proximity Sensor.
- Temperature Sensor
- Pressure Sensor
- Gyroscope Sensor
- Accelerometer
- Magnetic Field Sensor
- Orientation Sensor
- Gravity Sensor
- Linear Acceleration Sensor
- Rotation Vector Sensor
- Relative Humidity Sensor
- Near Field Communication ( NFC ) Sensor.