How to Declare a SensorManager

SensorManager was added in API Level 1
SensorManager lets you access the device's sensors

1. In the MainActivity.java file, add the below line to the import section.

import android.hardware.SensorManager;

2. Add the below line to the onCreate method. 

SensorManager mySensorManager; 

3. Compile and run!

Resources:
http://developer.android.com/reference/android/hardware/SensorManager.html
http://android-coding.blogspot.com/2011/10/using-android-device-build-in-light.html