android 传感器

Android中支持的几种传感器：

Sensor.TYPE_ACCELEROMETER：加速度传感器。
Sensor.TYPE_GYROSCOPE：陀螺仪传感器。
Sensor.TYPE_LIGHT：亮度传感器。
Sensor.TYPE_MAGNETIC_FIELD：地磁传感器。
Sensor.TYPE_ORIENTATION：方向传感器。
Sensor.TYPE_PRESSURE：压力传感器。
Sensor.TYPE_PROXIMITY：近程传感器。
Sensor.TYPE_TEMPERATURE：温度传感器。

使用传感器最关键的一些知识是：SensorManager是所有传感器的一个综合管理类，包括了传感器的种类、采样率、精准度等。我们可以通过getSystemService方法来取得一个SensorManager对象。使用传感器时，需要通过registerListener函数注册传感器，使用完后需要通过unregisterListener取消注册。
百闻不如一见，还是直接讲代码：
新建一个Sensors的工程，创建一个Sensors.java，内容如下：

 package me.sigma.sensors;import android.app.Activity;import android.hardware.SensorListener;import android.hardware.SensorManager;import android.os.Bundle;import android.widget.TextView;public class Sensors extends Activity {    TextView myTextView1;//t    //gen    TextView myTextView2;//x    TextView myTextView3;//y    TextView myTextView4;//z    //acc    TextView myTextView5;//x    TextView myTextView6;//y    TextView myTextView7;//z   //ori    TextView myTextView8;//x    TextView myTextView9;//y    TextView myTextView10;//z    //Light    TextView myTextView11;//z    SensorManager  mySensorManager;//    @Override     public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        myTextView1 = (TextView) findViewById(R.id.myTextView1);        myTextView2 = (TextView) findViewById(R.id.myTextView2);        myTextView3 = (TextView) findViewById(R.id.myTextView3);        myTextView4 = (TextView) findViewById(R.id.myTextView4);        myTextView5 = (TextView) findViewById(R.id.myTextView5);        myTextView6 = (TextView) findViewById(R.id.myTextView6);        myTextView7 = (TextView) findViewById(R.id.myTextView7);        myTextView8 = (TextView) findViewById(R.id.myTextView8);        myTextView9 = (TextView) findViewById(R.id.myTextView9);        myTextView10 = (TextView) findViewById(R.id.myTextView10);        myTextView11 = (TextView) findViewById(R.id.myTextView11);        mySensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);    }    private SensorListener mySensorListener = new SensorListener(){        @Override        public void onAccuracyChanged(int sensor, int accuracy) {}          @Override        public void onSensorChanged(int sensor, float[] values) {                   if(sensor == SensorManager.SENSOR_TEMPERATURE){                myTextView1.setText("Current Temprature："+values[0]);               }else if(sensor == SensorManager.SENSOR_MAGNETIC_FIELD){                myTextView2.setText("Current Magnetic x："+values[0]);                myTextView3.setText("Current Magnetic y："+values[1]);                myTextView4.setText("Current Magnetic z："+values[2]);            }else if(sensor == SensorManager.SENSOR_ACCELEROMETER){                myTextView5.setText("Current Accelero x："+values[0]);                myTextView6.setText("Current Accelero y："+values[1]);                myTextView7.setText("Current Accelero z："+values[2]);            }else if(sensor == SensorManager.SENSOR_ORIENTATION){                myTextView8.setText("Current Oraenttation x："+values[0]);                myTextView9.setText("Current Oraenttation y："+values[1]);                myTextView10.setText("Current Oraenttation z："+values[2]);            }else if(sensor == SensorManager.SENSOR_LIGHT){                myTextView11.setText("Current Oraenttation x："+values[0]);            }        }    };    @Override    protected void onResume() {        mySensorManager.registerListener(                mySensorListener,                 SensorManager.SENSOR_TEMPERATURE |                 SensorManager.SENSOR_MAGNETIC_FIELD |                 SensorManager.SENSOR_ACCELEROMETER |                 SensorManager.SENSOR_LIGHT |                        SensorManager.SENSOR_ORIENTATION,                SensorManager.SENSOR_DELAY_UI                );        super.onResume();    }       @Override    protected void onPause() {        mySensorManager.unregisterListener(mySensorListener);        super.onPause();    }}

更改res/layout/下面的main.xml,为如下内容：

 <?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:id="@+id/title"        android:gravity="center_horizontal"        android:textSize="20px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/title"/>    <TextView          android:id="@+id/myTextView1"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView1"/>            <TextView          android:id="@+id/myTextView2"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView2"/>        <TextView          android:id="@+id/myTextView3"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView3"/>        <TextView        android:id="@+id/myTextView4"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView4"/>         <TextView          android:id="@+id/myTextView5"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView5"/>        <TextView          android:id="@+id/myTextView6"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView6"/>        <TextView          android:id="@+id/myTextView7"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView7"/>        <TextView          android:id="@+id/myTextView8"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView8"/>         <TextView          android:id="@+id/myTextView9"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView9"/>         <TextView          android:id="@+id/myTextView10"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView10"/>            <TextView          android:id="@+id/myTextView11"        android:textSize="18px"        android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/myTextView11"/> </LinearLayout>

更改res/values/strings.xml为如下内容：

 <?xml version="1.0" encoding="utf-8"?><resources>    <string name="hello">templator!</string>    <string name="app_name">templator</string>    <string name="title">Sigma Sensors</string>    <string name="myTextView1">Current Temprature：</string>    <string name="myTextView2">Current Magnetic x：</string>    <string name="myTextView3">Current Magnetic y：</string>    <string name="myTextView4">Current Magnetic z：</string>    <string name="myTextView5">Current Accelero x：</string>    <string name="myTextView6">Current Accelero y：</string>    <string name="myTextView7">Current Accelero z：</string>    <string name="myTextView8">Current Oraenttation x：</string>    <string name="myTextView9">Current Oraenttation y：</string>    <string name="myTextView10">Current Oraenttation z：</string>    <string name="myTextView11">Current Light：</string></resources>

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