Get Light Sensor of Android device

package com.exercise.AndroidLightSensor;

import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;

public class AndroidLightSensor extends Activity {

SensorManager mySensorManager;
Sensor myLightSensor;

 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
 
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);
     TextView textLightSensor = (TextView)findViewById(R.id.lightsensor);
  
     mySensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
     myLightSensor = mySensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
  
     if (myLightSensor == null){
      textLightSensor.setText("No Light Sensor!");
     }else{
      textLightSensor.setText(myLightSensor.getName());
     }
 }
}

layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
<TextView
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="@string/hello"
 />
<TextView
 android:id="@+id/lightsensor"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
</LinearLayout>

Download the files.

Next:
- Implement SensorEventListener to monitor Android light sensor