Android传感器之光照传感器

package com.example.illumination_sensor;

import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;

/**
*
*
* 光照传感器
*
* @author pengxiaolong
*
*/
public class MainActivity extends Activity {

       private SensorManager sensorManager;

       private Sensor illuminationSensor;

       private TextView tv_g;

       private TextView tv_info;

       @Override
       protected void onCreate(Bundle savedInstanceState) {
               super .onCreate(savedInstanceState);
               setContentView(R.layout.main);
               View_init();
               pojectinit();
       }

       @Override
       public boolean onCreateOptionsMenu(Menu menu) {
               // Inflate the menu; this adds items to the action bar if it is present.
               getMenuInflater().inflate(R.menu.main, menu);
               return true ;
       }

       /**
        * 对象的初始化
        */
       private void pojectinit(){
               sensorManager=(SensorManager) getSystemService(SENSOR_SERVICE);
               illuminationSensor=sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);

               if (illuminationSensor== null ){
                       Toast.makeText( this , "您的设备沾不支持该功能！" , 0 ).show();
               } else {

               String str= "\n名字：" +illuminationSensor.getName()+ "\n电池：" +illuminationSensor.getPower()+ "\n类型：" +illuminationSensor.getType()+ "\nVendor:" +illuminationSensor.getVendor()+ "\n版本：" +illuminationSensor.getVersion()+ "\n幅度：" +illuminationSensor.getMaximumRange();
               tv_info.setText(str);

               }
               sensorManager.registerListener(sensorEventListener, illuminationSensor, SensorManager.SENSOR_DELAY_NORMAL);

       }

       /**
        * view的初始化
        */
       private void View_init()
       {
               tv_g=(TextView) this .findViewById(R.id.tv_g);
               tv_info=(TextView) this .findViewById(R.id.info);


       }



       @Override
       protected void onDestroy() {
               // TODO Auto-generated method stub
               super .onDestroy();
               sensorManager.unregisterListener(sensorEventListener);
       }


       /**
        * 监听器
        */
       private SensorEventListener sensorEventListener= new SensorEventListener() {

               @Override
               public void onSensorChanged(SensorEvent event) {
                       // TODO Auto-generated method stub
                       float [] values=event.values;

                       tv_g.setText( "光照为：" +values[ 0 ]);


               }

               @Override
               public void onAccuracyChanged(Sensor sensor, int accuracy) {
                       // TODO Auto-generated method stub

               }
       };


}