Android下调用传感器

 

Android下调用传感器（温度，亮度方向，地磁等，附源码）

装好Adroid SDK后，在sample的指导下，写了几个简单的类似hello world的程序，在这里介绍一下所写的在android下调用传感器的程序。

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：

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01package me.sigma.sensors;

02 

03 

04importandroid.app.Activity;

05importandroid.hardware.SensorListener;

06importandroid.hardware.SensorManager;

07importandroid.os.Bundle;

08importandroid.widget.TextView;

09 

10publicclass Sensors extendsActivity {

11    TextView myTextView1;//t

12    //gen

13    TextView myTextView2;//x

14    TextView myTextView3;//y

15    TextView myTextView4;//z

16    //acc

17    TextView myTextView5;//x

18    TextView myTextView6;//y

19    TextView myTextView7;//z

20  //ori

21    TextView myTextView8;//x

22    TextView myTextView9;//y

23    TextView myTextView10;//z

24    //Light

25    TextView myTextView11;//z

26 

27    SensorManager  mySensorManager;//

28    @Override  

29    publicvoid onCreate(Bundle savedInstanceState) {

30        super.onCreate(savedInstanceState);

31        setContentView(R.layout.main);

32        myTextView1 = (TextView) findViewById(R.id.myTextView1);

33        myTextView2 = (TextView) findViewById(R.id.myTextView2);

34        myTextView3 = (TextView) findViewById(R.id.myTextView3);

35        myTextView4 = (TextView) findViewById(R.id.myTextView4);

36        myTextView5 = (TextView) findViewById(R.id.myTextView5);

37        myTextView6 = (TextView) findViewById(R.id.myTextView6);

38        myTextView7 = (TextView) findViewById(R.id.myTextView7);

39        myTextView8 = (TextView) findViewById(R.id.myTextView8);

40        myTextView9 = (TextView) findViewById(R.id.myTextView9);

41        myTextView10 = (TextView) findViewById(R.id.myTextView10);

42        myTextView11 = (TextView) findViewById(R.id.myTextView11);

43        mySensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

44    }

45    privateSensorListener mySensorListener = newSensorListener(){

46        @Override

47        publicvoid onAccuracyChanged(intsensor, int accuracy) {}  

48        @Override

49        publicvoid onSensorChanged(intsensor, float[] values) {        

50            if(sensor == SensorManager.SENSOR_TEMPERATURE){

51                myTextView1.setText("Current Temprature："+values[0]);    

52            }elseif(sensor == SensorManager.SENSOR_MAGNETIC_FIELD){

53                myTextView2.setText("Current Magnetic x："+values[0]);

54                myTextView3.setText("Current Magnetic y："+values[1]);

55                myTextView4.setText("Current Magnetic z："+values[2]);

56            }elseif(sensor == SensorManager.SENSOR_ACCELEROMETER){

57                myTextView5.setText("Current Accelero x："+values[0]);

58                myTextView6.setText("Current Accelero y："+values[1]);

59                myTextView7.setText("Current Accelero z："+values[2]);

60            }elseif(sensor == SensorManager.SENSOR_ORIENTATION){

61                myTextView8.setText("Current Oraenttation x："+values[0]);

62                myTextView9.setText("Current Oraenttation y："+values[1]);

63                myTextView10.setText("Current Oraenttation z："+values[2]);

64            }elseif(sensor == SensorManager.SENSOR_LIGHT){

65                myTextView11.setText("Current Oraenttation x："+values[0]);

66            }

67        }

68    };

69    @Override

70    protectedvoid onResume() {

71        mySensorManager.registerListener(

72                mySensorListener,  

73                SensorManager.SENSOR_TEMPERATURE |  

74                SensorManager.SENSOR_MAGNETIC_FIELD |  

75                SensorManager.SENSOR_ACCELEROMETER |  

76                SensorManager.SENSOR_LIGHT |

77                        SensorManager.SENSOR_ORIENTATION,

78                SensorManager.SENSOR_DELAY_UI

79                );

80        super.onResume();

81    }    

82    @Override

83    protectedvoid onPause() {

84        mySensorManager.unregisterListener(mySensorListener);

85        super.onPause();

86    }

87}  

更改res/layout/下面的main.xml,为如下内容：

01<?xml version="1.0" encoding="utf-8"?>        

02<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"

03    android:orientation="vertical"

04    android:layout_width="fill_parent"

05    android:layout_height="fill_parent">

06    <TextView  

07        android:id="@+id/title"

08        android:gravity="center_horizontal"

09        android:textSize="20px"

10        android:layout_width="fill_parent"  

11        android:layout_height="wrap_content"  

12        android:text="@string/title"/>

13    <TextView  

14        android:id="@+id/myTextView1"

15        android:textSize="18px"

16        android:layout_width="fill_parent"  

17        android:layout_height="wrap_content"  

18        android:text="@string/myTextView1"/>    

19        <TextView  

20        android:id="@+id/myTextView2"

21        android:textSize="18px"

22        android:layout_width="fill_parent"  

23        android:layout_height="wrap_content"  

24        android:text="@string/myTextView2"/>

25        <TextView  

26        android:id="@+id/myTextView3"

27        android:textSize="18px"

28        android:layout_width="fill_parent"  

29        android:layout_height="wrap_content"  

30        android:text="@string/myTextView3"/>

31        <TextView

32        android:id="@+id/myTextView4"

33        android:textSize="18px"

34        android:layout_width="fill_parent"  

35        android:layout_height="wrap_content"  

36        android:text="@string/myTextView4"/>  

37        <TextView  

38        android:id="@+id/myTextView5"

39        android:textSize="18px"

40        android:layout_width="fill_parent"  

41        android:layout_height="wrap_content"  

42        android:text="@string/myTextView5"/>

43        <TextView  

44        android:id="@+id/myTextView6"

45        android:textSize="18px"

46        android:layout_width="fill_parent"  

47        android:layout_height="wrap_content"  

48        android:text="@string/myTextView6"/>

49        <TextView  

50        android:id="@+id/myTextView7"

51        android:textSize="18px"

52        android:layout_width="fill_parent"  

53        android:layout_height="wrap_content"  

54        android:text="@string/myTextView7"/>

55        <TextView  

56        android:id="@+id/myTextView8"

57        android:textSize="18px"

58        android:layout_width="fill_parent"  

59        android:layout_height="wrap_content"  

60        android:text="@string/myTextView8"/>  

61        <TextView  

62        android:id="@+id/myTextView9"

63        android:textSize="18px"

64        android:layout_width="fill_parent"  

65        android:layout_height="wrap_content"  

66        android:text="@string/myTextView9"/>  

67        <TextView  

68        android:id="@+id/myTextView10"

69        android:textSize="18px"

70        android:layout_width="fill_parent"  

71        android:layout_height="wrap_content"  

72        android:text="@string/myTextView10"/>    

73        <TextView  

74        android:id="@+id/myTextView11"

75        android:textSize="18px"

76        android:layout_width="fill_parent"  

77        android:layout_height="wrap_content"  

78        android:text="@string/myTextView11"/>  

79</LinearLayout>

80 

更改res/values/strings.xml为如下内容：

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01<?xml version="1.0" encoding="utf-8"?>

02<resources>

03    <stringname="hello">templator!</string>

04    <stringname="app_name">templator</string>

05    <stringname="title">Sigma Sensors</string>

06    <stringname="myTextView1">Current Temprature：</string>

07    <stringname="myTextView2">Current Magnetic x：</string>

08    <stringname="myTextView3">Current Magnetic y：</string>

09    <stringname="myTextView4">Current Magnetic z：</string>

10    <stringname="myTextView5">Current Accelero x：</string>

11    <stringname="myTextView6">Current Accelero y：</string>

12    <stringname="myTextView7">Current Accelero z：</string>

13    <stringname="myTextView8">Current Oraenttation x：</string>

14    <stringname="myTextView9">Current Oraenttation y：</string>

15    <stringname="myTextView10">Current Oraenttation z：</string>

16    <stringname="myTextView11">Current Light：</string>

17</resources>

18