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Android下调用传感器(温度,亮度方向,地磁等,附源码)

2011年4月29日 sigma 5 条评论 21,693 views

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:

 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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