下面是我编写的用于捕获和写入设备上的传感器列表以及相应传感器数据的类
唯一的问题是方法writeSensorData()，代码执行到onSensorChanged()之前。因此，没有数据登录到相应的文本文件。
对代码的帮助会非常有用。
AndroidSensorList.java
package com.example.androidsensorlist;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.content.Context;
//import android.content.Intent;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorListener;
//import android.hardware.SensorListener;
import android.hardware.SensorManager;
import android.widget.ArrayAdapter;
public class AndroidSensorList extends ListActivity {
public static final String file = ("data.txt");
public static File myData = null;
public static File myDataCollection = null;
public static final String DATA_COLLECTION_FILE = ("DataCollection.txt");
public SensorEventListener mSensorListener ;
public SensorManager sensorManager;
public List<Sensor> listSensor;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//creating Folder on device
String newFolder = "/myFolder2";
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File myNewFolder = new File(extStorageDirectory + newFolder);
myNewFolder.mkdir();
myData = new File(extStorageDirectory + newFolder + "/"+ file);
try{
if(!myData.exists()){
myData.createNewFile();
}
}catch(IOException ioExp){
Log.d("AndroidSensorList::", "error in file creation");
}
myDataCollection = new File(extStorageDirectory + newFolder + "/"+ DATA_COLLECTION_FILE);
try{
if(!myDataCollection.exists()){
myDataCollection.createNewFile();
}
}catch(IOException ioExp){
Log.d("AndroidSensorList::", "error in file creation");
}
//retrieving the list of sensors available on a device
sensorManager
= (SensorManager)getSystemService(Context.SENSOR_SERVICE);
listSensor
= sensorManager.getSensorList(Sensor.TYPE_ALL);
sensorManager.registerListener(mSensorListener, sensorManager.getDefaultSensor(Sensor.TYPE_ALL), SensorManager.SENSOR_DELAY_NORMAL);
//Creating List view and writing data to a file
List<String> listSensorType = new ArrayList<String>();
for(int i=0; i<listSensor.size(); i++){
System.out.println("Inside list sensors:::::::");
listSensorType.add((i+1)+" "+listSensor.get(i).getName());
String sensorNames = listSensor.get(i).getName();
System.out.println(listSensor.get(i).getType());
//mSensorManager.registerListener(mSensorListener, mSensorManager.getDefaultSensor(listSensor.get(i).getType()), SensorManager.SENSOR_DELAY_NORMAL);
writeToFile(listSensor.get(i).getName().getBytes(),sensorNames );
}
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,
listSensorType));
getListView().setTextFilterEnabled(true);
}
private void writeSensorData(final String sensorName) {
System.out.println("------------------Inside writeSensorData() ----------------");
System.out.println("Sensor Name::"+sensorName);
//sensorManager.registerListener(mSensorListener, sensorManager.getDefaultSensor(Sensor.TYPE_ALL), SensorManager.SENSOR_DELAY_NORMAL);
//final SensorEventListener mSensorListener = null;
mSensorListener= new SensorEventListener(){
@Override
public void onSensorChanged(SensorEvent event) {
System.out.println("++++++++++++++++INSIDE onSensorChanged() ++++++++++++++++++++++");
System.out.println("sensorName:"+sensorName);
System.out.println("event.sensor.getName():"+event.sensor.getName());
if(sensorName.equalsIgnoreCase(event.sensor.getName())){
float x,y,z;
x=event.values[0];
y=event.values[1];
z=event.values[2];
System.out.println(sensorName+"::"+"X="+x+"Y="+y+"Z="+z);
//sensorManager.registerListener(mSensorListener, sensorManager.getDefaultSensor(event.sensor.getType()), SensorManager.SENSOR_DELAY_NORMAL);
String xVal= String.valueOf(x);
String yVal= String.valueOf(y);
String zVal= String.valueOf(z);
byte[] bX_Value= xVal.getBytes();
byte[] bY_Value= yVal.getBytes();
byte[] bZ_Value= zVal.getBytes();
String newLine = "\n";
byte[] bnewLine = newLine.getBytes();
byte[] bSensorName = sensorName.getBytes();
try{
OutputStream fo = new FileOutputStream(myDataCollection,true);
fo.write(bnewLine);
fo.write(bSensorName);
fo.write(bX_Value);
fo.write(bY_Value);
fo.write(bZ_Value);
fo.write(bnewLine);
fo.close();
}catch(IOException e){
Log.e("AndroidSensorList::","File write failed: " + e.toString());
}
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
//no need to override
}
};
}
private void writeToFile(byte[] data, String sensorNames) {
System.out.println("----------------Inside writeToFile-----------------");
writeSensorData(sensorNames);
try {
String comma = "\n";
byte[] bComma = comma.getBytes();
OutputStream fo = new FileOutputStream(myData,true);
fo.write(bComma);
fo.write(data);
fo.close();
}
catch (IOException e) {
Log.e("AndroidSensorList::","File write failed: " + e.toString());
}
}
protected void onResume() {
super.onResume();
sensorManager.registerListener(mSensorListener, sensorManager.getDefaultSensor(Sensor.TYPE_ALL), SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause() {
sensorManager.unregisterListener(mSensorListener);
super.onPause();
}
}
答案 0 :(得分：1)
以下是我提出的同时收集所有传感器数据并将其写入文件的信息。
public class AndroidSensorList extends ListActivity implements SensorEventListener {
//global variables
public static final String file = ("data.txt");
public static File myData = null;
public static File myDataCollection = null;
public static final String DATA_COLLECTION_FILE = ("DataCollection.txt");
public SensorEventListener mSensorListener ;
public SensorManager sensorManager;
public List<Sensor> listSensor;
private Sensor mAccelerometer,mProximity, mAmbientTemp, mGameRotationVect, mGeomagneticRotationVecor, mGravity, mGyroscope,
mGyroUncal, mLight, mLinearAcceleration, mMagFld, mMagFldUncal, mOrientation, mPressure, mRelativeHumid, mRotVect,
mSignificantMotion, mStepCntr, mStepDetect, mTemp;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//creating Folder on device
String newFolder = "/myFolder2";
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File myNewFolder = new File(extStorageDirectory + newFolder);
myNewFolder.mkdir();
myData = new File(extStorageDirectory + newFolder + "/"+ file);
try{
if(!myData.exists()){
myData.createNewFile();
}
}catch(IOException ioExp){
Log.d("AndroidSensorList::", "error in file creation");
}
myDataCollection = new File(extStorageDirectory + newFolder + "/"+ DATA_COLLECTION_FILE);
try{
if(!myDataCollection.exists()){
myDataCollection.createNewFile();
}
}catch(IOException ioExp){
Log.d("AndroidSensorList::", "error in file creation");
}
//retrieving the list of sensors available on a device
sensorManager
= (SensorManager)getSystemService(Context.SENSOR_SERVICE);
listSensor
= sensorManager.getSensorList(Sensor.TYPE_ALL);
mAccelerometer=sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mAmbientTemp=sensorManager.getDefaultSensor(Sensor.TYPE_AMBIENT_TEMPERATURE);
mGameRotationVect=sensorManager.getDefaultSensor(Sensor.TYPE_GAME_ROTATION_VECTOR);
mGeomagneticRotationVecor=sensorManager.getDefaultSensor(Sensor.TYPE_GEOMAGNETIC_ROTATION_VECTOR);
mGravity=sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY);
mGyroscope=sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE);
mGyroUncal=sensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE_UNCALIBRATED);
mLight=sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
mLinearAcceleration=sensorManager.getDefaultSensor(Sensor.TYPE_LINEAR_ACCELERATION);
mMagFld=sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
mMagFldUncal=sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD_UNCALIBRATED);
mOrientation=sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
mPressure=sensorManager.getDefaultSensor(Sensor.TYPE_PRESSURE);
mProximity=sensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
mRelativeHumid=sensorManager.getDefaultSensor(Sensor.TYPE_RELATIVE_HUMIDITY);
mRotVect=sensorManager.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR);
mSignificantMotion=sensorManager.getDefaultSensor(Sensor.TYPE_SIGNIFICANT_MOTION);
mStepCntr=sensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);
mStepDetect=sensorManager.getDefaultSensor(Sensor.TYPE_STEP_DETECTOR);
mTemp=sensorManager.getDefaultSensor(Sensor.TYPE_TEMPERATURE);
//Creating List view and writing data to a file
List<String> listSensorType = new ArrayList<String>();
for(int i=0; i<listSensor.size(); i++){
System.out.println("Inside list sensors:::::::");
listSensorType.add((i+1)+" "+listSensor.get(i).getName());
String sensorNames = listSensor.get(i).getName();
System.out.println(listSensor.get(i).getType());
//mSensorManager.registerListener(mSensorListener, mSensorManager.getDefaultSensor(listSensor.get(i).getType()), SensorManager.SENSOR_DELAY_NORMAL);
writeToFile(listSensor.get(i).getName().getBytes(),sensorNames );
}
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,
listSensorType));
getListView().setTextFilterEnabled(true);
}
private void writeToFile(byte[] data, String sensorNames) {
System.out.println("----------------Inside writeToFile-----------------");
try {
String comma = "\n";
byte[] bComma = comma.getBytes();
OutputStream fo = new FileOutputStream(myData,true);
fo.write(bComma);
fo.write(data);
fo.close();
}
catch (IOException e) {
Log.e("AndroidSensorList::","File write failed: " + e.toString());
}
}
protected void onResume() {
super.onResume();
sensorManager.registerListener(this,mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mProximity, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this,mAmbientTemp, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mGameRotationVect, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this,mGeomagneticRotationVecor, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mGravity, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mGyroscope, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mGyroUncal, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mLight, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mLinearAcceleration, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this,mMagFld, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this,mMagFldUncal, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this,mOrientation, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this,mPressure, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mRelativeHumid, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this,mRotVect, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mSignificantMotion, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this,mStepCntr, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mStepDetect, SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(this, mTemp, SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause() {
sensorManager.unregisterListener(mSensorListener);
super.onPause();
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub
}
@Override
public void onSensorChanged(SensorEvent event) {
// TODO Auto-generated method stub
System.out.println("++++++++++++++++INSIDE onSensorChanged() ++++++++++++++++++++++");
//System.out.println("sensorName:"+sensorName);
System.out.println("event.sensor.getName():"+event.sensor.getName());
float x,y,z;
x=event.values[0];
y=event.values[1];
z=event.values[2];
writeDataTofile(event.sensor.getName(),x,y,z);
}
public void writeDataTofile(String sensorsName, float x, float y, float z){
System.out.println(sensorsName+"::"+"X="+x+"Y="+y+"Z="+z);
//mSensorManager.registerListener(mSensorListener, mSensorManager.getDefaultSensor(event.sensor.getType()), SensorManager.SENSOR_DELAY_NORMAL);
String xVal= String.valueOf(x);
String yVal= String.valueOf(y);
String zVal= String.valueOf(z);
byte[] bX_Value= xVal.getBytes();
byte[] bY_Value= yVal.getBytes();
byte[] bZ_Value= zVal.getBytes();
String newLine = "\n";
byte[] bnewLine = newLine.getBytes();
String sSeparator="||";
byte[] bSeparator=sSeparator.getBytes();
byte[] bSensorName = sensorsName.getBytes();
try{
OutputStream fo = new FileOutputStream(myDataCollection,true);
fo.write(bnewLine);
fo.write(bSensorName);
fo.write(bX_Value);
fo.write(bSeparator);
fo.write(bY_Value);
fo.write(bSeparator);
fo.write(bZ_Value);
fo.write(bnewLine);
fo.close();
}catch(IOException e){
Log.e("AndroidSensorList::","File write failed: " + e.toString());
}
}
}