Android Ambient Light Sensing

In Android, Ambient Light Sensing is pretty much straight forward. Below is the code to achieve this. Also including some of the experiences in testing this out with the real hardware , my Android One phone. 

android.hardware.SensorManager sensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);

        if(sensorManager != null) {

            Sensor lightSensor

                    = sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);

            if (lightSensor == null){

                Log.v(LOG_TAG,"light sensor is null!");

            }else{

                float max =  lightSensor.getMaximumRange();

                Log.v(LOG_TAG,"Max light range is :"+max);

                sensorManager.registerListener(lightSensorEventListener,

                        lightSensor,

                        SensorManager.SENSOR_DELAY_NORMAL);

            }

        }

        else

        {

            Log.v(LOG_TAG,"Sensor manager is null during create");

        }

SensorEventListener lightSensorEventListener

            = new SensorEventListener(){

        @Override

        public void onAccuracyChanged(Sensor sensor, int accuracy) {

            // TODO Auto-generated method stub

        }

        @Override

        public void onSensorChanged(SensorEvent event) {

            // TODO Auto-generated method stub

            if(event.sensor.getType()==Sensor.TYPE_LIGHT){

                final float currentReading = event.values[0];

                Log.v(LOG_TAG,"Current reading from light sensor is :"+currentReading);

            }

        }

    };

Based on experience, few points below 

- During day light, the onSensorChanged call back get called frequently with values > 70 

- When there is no light, the value becomes < 10

References: 

http://stackoverflow.com/questions/20609370/how-do-get-the-specific-values-of-light-sensor