Android中的感应器

在别人那里看到这个，就随便保存下来，不知道啥时候遇到能用的时候呢
package com.softeem.android;import java.util.List;     import android.app.Activity;     import android.content.Context;     import android.hardware.Sensor;     import android.hardware.SensorEvent;     import android.hardware.SensorEventListener;     import android.hardware.SensorManager;     import android.os.Bundle;     import android.widget.TextView;          public class HelloSensor extends Activity {         Sensor sensor ;         private float x, y, z;         /** Called when the activity is first created. */         @Override         public void onCreate(Bundle savedInstanceState) {             super.onCreate(savedInstanceState);             setContentView(R.layout.main);                  //准备显示信息的UI组建             final TextView tx1 = (TextView) findViewById(R.id.TextView01);                  //从系统服务中获得传感器管理器             SensorManager sm = (SensorManager) getSystemService(Context.SENSOR_SERVICE);                  //从传感器管理器中获得全部的传感器列表             List<Sensor> allSensors = sm.getSensorList(Sensor.TYPE_ALL);                  //显示有多少个传感器             tx1.setText("经检测该手机有" + allSensors.size() + "个传感器，他们分别是：\n");                  //显示每个传感器的具体信息             for (Sensor s : allSensors) {                      String tempString = "\n" + "  设备名称：" + s.getName() + "\n" + "  设备版本：" + s.getVersion() + "\n" + "  供应商："                         + s.getVendor() + "\n";                      switch (s.getType()) {                 case Sensor.TYPE_ACCELEROMETER:                     tx1.setText(tx1.getText().toString() + s.getType() + " 加速度传感器accelerometer" + tempString);                     break;     //            case Sensor.TYPE_GRAVITY:     //                tx1.setText(tx1.getText().toString() + s.getType() + " 重力传感器gravity API 9" + tempString);     //                break;                 case Sensor.TYPE_GYROSCOPE:                     tx1.setText(tx1.getText().toString() + s.getType() + " 陀螺仪传感器gyroscope" + tempString);                     break;                 case Sensor.TYPE_LIGHT:                     tx1.setText(tx1.getText().toString() + s.getType() + " 环境光线传感器light" + tempString);                     break;     //            case Sensor.TYPE_LINEAR_ACCELERATION:     //                tx1.setText(tx1.getText().toString() + s.getType() + " 线性加速器LINEAR_ACCELERATION API 9" + tempString);     //                break;                 case Sensor.TYPE_MAGNETIC_FIELD:                     tx1.setText(tx1.getText().toString() + s.getType() + " 电磁场传感器magnetic field" + tempString);                     break;                 case Sensor.TYPE_ORIENTATION:                     tx1.setText(tx1.getText().toString() + s.getType() + " 方向传感器orientation" + tempString);                     break;                 case Sensor.TYPE_PRESSURE:                     tx1.setText(tx1.getText().toString() + s.getType() + " 压力传感器pressure" + tempString);                     break;                 case Sensor.TYPE_PROXIMITY:                     tx1.setText(tx1.getText().toString() + s.getType() + " 距离传感器proximity" + tempString);                     break;     //            case Sensor.TYPE_ROTATION_VECTOR:     //                tx1.setText(tx1.getText().toString() + s.getType() + " 旋转向量ROTATION" + tempString);     //                break;                 case Sensor.TYPE_TEMPERATURE:                     tx1.setText(tx1.getText().toString() + s.getType() + " 温度传感器temperature" + tempString);                     break;                 default:                     tx1.setText(tx1.getText().toString() + s.getType() + " 未知传感器" + tempString);                     break;                 }             }                           //在title上显示重力传感器的变化             sensor = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);             SensorEventListener lsn = new SensorEventListener() {                 public void onSensorChanged(SensorEvent e) {                     x = e.values[SensorManager.DATA_X];                     y = e.values[SensorManager.DATA_Y];                     z = e.values[SensorManager.DATA_Z];                     setTitle("x=" + (int) x + "," + "y=" + (int) y + "," + "z="+ (int) z);                 }                      public void onAccuracyChanged(Sensor s, int accuracy) {            }             };             // 注册listener，第三个参数是检测的精确度             sm.registerListener(lsn, sensor, SensorManager.SENSOR_DELAY_GAME);              }     }
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