详解 android 光线传感器 light sensor的使用

概述调用anroid的光线传感器使用。实现效果图：MainActivity.Javapackagehk.ust.cse.comp107x.ligthsensor;

调用anroID的光线传感器使用。

实现效果图：

MainActivity.Java

package hk.ust.cse.comp107x.ligthsensor;  import androID.content.Context; import androID.harDWare.Sensor; import androID.harDWare.SensorEvent; import androID.harDWare.SensorEventListener; import androID.harDWare.SensorManager; import androID.support.v7.app.AppCompatActivity; import androID.os.Bundle; import androID.Widget.TextVIEw;  public class MainActivity extends AppCompatActivity implements SensorEventListener{   private SensorManager mSensorManager;   private Sensor mPressure;   @OverrIDe   protected voID onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentVIEw(R.layout.activity_main);     // Get an instance of the sensor service,and use that to get an instance of     // a particular sensor.     mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);     mPressure = mSensorManager.getDefaultSensor(Sensor.TYPE_liGHT);   }   @OverrIDe   public final voID onAccuracyChanged(Sensor sensor,int accuracy) {     // Do something here if sensor accuracy changes.   }   @OverrIDe   public final voID onSensorChanged(SensorEvent event) {     float light = event.values[0];     TextVIEw v = (TextVIEw)findVIEwByID(R.ID.textVIEw);     v.setText(float.toString(light));     // Do something with this sensor data.   }   @OverrIDe   protected voID onResume() {     // Register a Listener for the sensor.     super.onResume();     mSensorManager.registerListener(this,mPressure,SensorManager.SENSOR_DELAY_norMAL);   }    @OverrIDe   protected voID onPause() {     // Be sure to unregister the sensor when the activity pauses.     super.onPause();     mSensorManager.unregisterListener(this);   } } 

activity_main.xml

<?xml version="1.0" enCoding="utf-8"?> <relativeLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"   xmlns:tools="http://schemas.androID.com/tools"   androID:layout_wIDth="match_parent"   androID:layout_height="match_parent"   androID:paddingBottom="@dimen/activity_vertical_margin"   androID:paddingleft="@dimen/activity_horizontal_margin"   androID:paddingRight="@dimen/activity_horizontal_margin"   androID:paddingtop="@dimen/activity_vertical_margin"   tools:context="hk.ust.cse.comp107x.ligthsensor.MainActivity">    <TextVIEw     androID:ID="@+ID/textVIEw"     androID:textSize="50dp"     androID:layout_wIDth="wrap_content"     androID:layout_height="wrap_content"     androID:text="Hello World!"     androID:layout_alignParenttop="true"     androID:layout_centerHorizontal="true"     androID:layout_margintop="177dp" /> </relativeLayout> 

AndroIDManifest.xml

<?xml version="1.0" enCoding="utf-8"?> <manifest xmlns:androID="http://schemas.androID.com/apk/res/androID"   package="hk.ust.cse.comp107x.ligthsensor">    <application     androID:allowBackup="true"     androID:icon="@mipmap/ic_launcher"     androID:label="@string/app_name"     androID:supportsRtl="true"     androID:theme="@style/Apptheme">     <activity androID:name=".MainActivity">       <intent-filter>         <action androID:name="androID.intent.action.MAIN" />          <category androID:name="androID.intent.category.LAUNCHER" />       </intent-filter>     </activity>   </application>  </manifest> 

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