我正在使用 android 传感器数据过滤。同时，我不擅长JAVA。它需要将“FixFilter”类与启动 ENS492SensorsActivity 的主要源代码集成。在这种方法中，我的目标是过滤取自加速度计和方向传感器的数据。acx 是在 X 方向上从加速度计获取的数据，而 orx 是从 X 方向上的方向数据中获取的数据。
public float FixFilter (double acx, float orx)
{
orx = 0.75*(orx) + 0.25*(acx);
return orx;
}
public class Ens492SenorsActivity extends Activity implements SensorListener
{
final String tag = "IBMEyes";
SensorManager sm = null;
TextView xViewA = null;
TextView yViewA = null;
TextView zViewA = null;
TextView xViewO = null;
TextView yViewO = null;
TextView zViewO = null;
//for gps
TextView xView1 = null;
TextView yView1 = null;
TextView zView1 = null;
private LocationManager locManager;
private LocationListener locListener = new MyLocationListener();
private boolean gps_enabled = false;
private boolean network_enabled = false;
private Timer mTimer = new Timer();
private int REFRESH_TIME = 1000;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
sm = (SensorManager) getSystemService(SENSOR_SERVICE);
setContentView(R.layout.main);
xViewA = (TextView) findViewById(R.id.xbox);
yViewA = (TextView) findViewById(R.id.ybox);
zViewA = (TextView) findViewById(R.id.zbox);
xViewO = (TextView) findViewById(R.id.xboxo);
yViewO = (TextView) findViewById(R.id.yboxo);
zViewO = (TextView) findViewById(R.id.zboxo);
xView1 = (TextView) findViewById(R.id.xbox1);
yView1 = (TextView) findViewById(R.id.ybox1);
zView1 = (TextView) findViewById(R.id.zbox1);
locManager = (LocationManager) getSystemService(this.LOCATION_SERVICE);
locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, locListener);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
init_arr();
}
public static void connect(String url)
{
HttpClient httpclient = new DefaultHttpClient();
// Prepare a request object
HttpGet httpget = new HttpGet(url);
// Execute the request
HttpResponse response;
try {
response = httpclient.execute(httpget);
// Examine the response status
Log.i("Praeda",response.getStatusLine().toString());
// Get hold of the response entity
HttpEntity entity = response.getEntity();
// If the response does not enclose an entity, there is no need
// to worry about connection release
if (entity != null) {
// A Simple JSON Response Read
InputStream instream = entity.getContent();
String result= convertStreamToString(instream);
// now you have the string representation of the HTML request
instream.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
private static String convertStreamToString(InputStream is) {
/*
* To convert the InputStream to String we use the BufferedReader.readLine()
* method. We iterate until the BufferedReader return null which means
* there's no more data to read. Each line will appended to a StringBuilder
* and returned as String.
*/
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
public void ShowMap(View v)
{
String uri = String.format("geo:%f,%f", alig.getLatitude(), alig.getLongitude());
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
this.startActivity(intent);
}
public double DoruksKalman (double v1, double v2, double v3,double v4,double v5,double v6,double v7,double v8,double v9,double v10 )
{
double result = 0;
//result = 10 / ( 1/ v1 + 1/ v2 +1/ v3 +1/ v4 +1/ v5 +1/ v6 +1/ v7 +1/ v8 +1/ v9 +1/ v10);
result = (v1 + v2 + v3 + v4 +v5 + v6 +v7 + v8 +v9 + v10)/10;
return result;
}
public float FixFilter (double acx, float orx)
{
orx = 0.75*(orx) + 0.25*(acx);
return orx;
}
public void SendToServer(View v)
{
Log.i(getClass().getSimpleName(), "send task - start");
try{
connect("http://192.168.1.117/ens4912/process.php?ip=&lat=" +
DoruksKalman(
alig.getLatitude(), alig.getLatitude(),alig.getLatitude(),
alig.getLatitude(),alig.getLatitude(),alig.getLatitude(),
alig.getLatitude(),alig.getLatitude(),alig.getLatitude(),
alig.getLatitude())+
"&lng="+
DoruksKalman(alig.getLongitude(), alig.getLongitude(),alig.getLongitude(), alig.getLongitude(),
alig.getLongitude(), alig.getLongitude(), alig.getLongitude(),
alig.getLongitude(), alig.getLongitude(), alig.getLongitude())+
"&alt="+
DoruksKalman(alig.getAltitude(),alig.getAltitude(),alig.getAltitude(),
alig.getAltitude(),alig.getAltitude(),alig.getAltitude(),
alig.getAltitude(),alig.getAltitude(),alig.getAltitude(),alig.getAltitude())+
"&accel="+
DoruksKalman(acx_arr[0], acx_arr[1],acx_arr[2],acx_arr[3],acx_arr[4],
acx_arr[5],acx_arr[6],acx_arr[7],
acx_arr[8],acx_arr[9])+
"&mag="+
DoruksKalman(orx_arr[0], orx_arr[1], orx_arr[2], orx_arr[3],
orx_arr[4],orx_arr[5],orx_arr[6],
orx_arr[7],orx_arr[8],orx_arr[9])
);//"http://www.google.com");
}
catch (Exception e)
{
double zero =0.0;
e.printStackTrace();
connect("http://192.168.1.117/ens4912/process.php?ip=&lat=" +
zero+
"&lng="+
zero+
"&alt="+
zero+
"&accel="+
DoruksKalman(acx_arr[0], acx_arr[1],acx_arr[2],acx_arr[3],acx_arr[4],
acx_arr[5],acx_arr[6],acx_arr[7],
acx_arr[8],acx_arr[9])+
"&mag="+
DoruksKalman(orx_arr[0], orx_arr[1], orx_arr[2], orx_arr[3],
orx_arr[4],orx_arr[5],orx_arr[6],
orx_arr[7],orx_arr[8],orx_arr[9])
);
}
Log.i(getClass().getSimpleName(), "send task - end");
}
float orx;
float ory;
float orz;
float acx;
float acy;
float acz;
float [] acx_arr = new float[10];
float [] acy_arr = new float[10];
float [] acz_arr = new float[10];
float [] orx_arr = new float[10];
float [] ory_arr = new float[10];
float [] orz_arr = new float[10];
private void init_arr()
{
for(int i = 0;i <10;i++)
{
acx_arr[i] = 1.0f;
acy_arr[i] = 1.0f;
acz_arr[i] = 1.0f;
orx_arr[i] = 1.0f;
ory_arr[i] = 1.0f;
orz_arr[i] = 1.0f;
}
}
int sensorReadCount = 0;
private final float NOISE = (float) 2.0;
private float mLastX, mLastY, mLastZ;
private boolean mInitialized = false;
public void onSensorChanged(int sensor, float[] values) {
Boolean writeIt = false;
synchronized (this) {
//Log.d(tag, "onSensorChanged: " + sensor + ", x: " + values[0] + ", y: " + values[1] + ", z: " + values[2]);
if (sensor == SensorManager.SENSOR_ORIENTATION) {
xViewO.setText("Orientation X: " +
DoruksKalman(orx_arr[0], orx_arr[1],orx_arr[2],orx_arr[3],orx_arr[4],
orx_arr[5],orx_arr[6],orx_arr[7],
orx_arr[8],orx_arr[9]));
yViewO.setText("Orientation Y: " +
DoruksKalman(ory_arr[0], ory_arr[1],ory_arr[2],ory_arr[3],ory_arr[4],
ory_arr[5],ory_arr[6],ory_arr[7],
ory_arr[8],ory_arr[9]));
zViewO.setText("Orientation Z: " +
DoruksKalman(orz_arr[0], orz_arr[1],orz_arr[2],orz_arr[3],orz_arr[4],
orz_arr[5],orz_arr[6],orz_arr[7],
orx_arr[8],orx_arr[9]));
orx = values[0];
ory = values[1];
orz = values[2];
orx_arr[sensorReadCount%10] = orx;
ory_arr[sensorReadCount%10] = ory;
orz_arr[sensorReadCount%10] = orz;
}
if (sensor == SensorManager.SENSOR_ACCELEROMETER) {
acx = values[0];
acy = values[1];
acz = values[2];
if (!mInitialized) {
mLastX = acx;
mLastY = acy;
mLastZ = acz;
mInitialized = true;
}
else {
float deltaX = Math.abs(mLastX - acx);
float deltaY = Math.abs(mLastY - acy);
float deltaZ = Math.abs(mLastZ - acz);
if (deltaX < NOISE) deltaX = (float)0.0;
if (deltaY < NOISE) deltaY = (float)0.0;
if (deltaZ < NOISE) deltaZ = (float)0.0;
mLastX = acx;
mLastY = acy;
mLastZ = acz;
if (deltaX > deltaY) {
//iv.setImageResource(R.drawable.horizontal);
writeIt = false;
} else if (deltaY > deltaX) {
//iv.setImageResource(R.drawable.vertical);
writeIt = true;
} else {
//iv.setVisibility(View.INVISIBLE);
writeIt = false;
}
}
xViewA.setText("Accel X: " + acx);
yViewA.setText("Accel Y: " + acy);
zViewA.setText("Accel Z: " + acz);
/*
xViewA.setText("Accel X: " +
DoruksKalman(acx_arr[0], acx_arr[1],acx_arr[2],acx_arr[3],acx_arr[4],
acx_arr[5],acx_arr[6],acx_arr[7],
acx_arr[8],acx_arr[9]));
yViewA.setText("Accel Y: " +
DoruksKalman(acy_arr[0], acy_arr[1],acy_arr[2],acy_arr[3],acy_arr[4],
acy_arr[5],acy_arr[6],acy_arr[7],
acy_arr[8],acy_arr[9]));
zViewA.setText("Accel Z: " +
DoruksKalman(acz_arr[0], acz_arr[1],acz_arr[2],acz_arr[3],acz_arr[4],
acz_arr[5],acz_arr[6],acz_arr[7],
acz_arr[8],acz_arr[9]));
*/
acx_arr[sensorReadCount%10] = acx;
acy_arr[sensorReadCount%10] = acy;
acz_arr[sensorReadCount%10] = acz;
}
}
try
{
if(sensorReadCount % 10 == 0 && writeIt)// sensorReadCount <= 60 * 10 /* write for 10 minutes*/ )
{
WriteToTXT();
}
}
catch(Exception e)
{
e.printStackTrace();
}
sensorReadCount++;
}
public Boolean IsItBumb()
{
return true;
}
public void onAccuracyChanged(int sensor, int accuracy) {
Log.d(tag,"onAccuracyChanged: " + sensor + ", accuracy: " + accuracy);
}
int id = 0;
private void WriteToTXT()
{
id++;
// TO DO
// Buray\FD dolduracaks\FDn\FDz
//sat\FDr sat\FDr
//id - lat - lon -alt - magx - magy - magz - accx - accy -accz - time
double lat;
double lon;
double alt;
double speed;
try
{
lat = alig.getLatitude();
lon = alig.getLongitude();
alt = alig.getAltitude();
speed = alig.getSpeed();
}
catch( Exception e)
{
lat = 0.0;
lon = 0.0;
alt = 0.0;
speed = 0.0;
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
String currentDateandTime = sdf.format(new Date());
String fileName = "doruks_txt";
/*
String sBody = id + " " + lat + " " + lon + " " + alt + " " + orx + " " + ory + " " +
orz + " " + acx + " " + acy + " " + acz + " " + speed + " " + currentDateandTime;
*/
String sBody = lat + "|" + lon + "|" + alt + " " + orx + " " + ory + " " +
orz + " " + acx + " " + acy + " " + acz + " " + speed + " " + currentDateandTime + "|" + id;
generateNoteOnSD(fileName, sBody);
appendLog(sBody);
}
public void appendLog(String text)
{
File logFile = new File("sdcard/mylog.file");
if (!logFile.exists())
{
try
{
logFile.createNewFile();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
try
{
//BufferedWriter for performance, true to set append to file flag
BufferedWriter buf = new BufferedWriter(new FileWriter(logFile, true));
buf.append(text);
buf.newLine();
buf.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void generateNoteOnSD(String sFileName, String sBody)
{
try
{
File root = new File(Environment.getExternalStorageDirectory(), "Notes");
if (!root.exists())
{
root.mkdirs();
}
File gpxfile = new File(root, sFileName);
FileWriter writer = new FileWriter(gpxfile);
writer.append(sBody);
writer.flush();
writer.close();
Toast.makeText(this, "Saved", Toast.LENGTH_SHORT).show();
}
catch(IOException e)
{
e.printStackTrace();
}
}
@Override
protected void onResume() {
super.onResume();
sm.registerListener(this,
SensorManager.SENSOR_ORIENTATION |
SensorManager.SENSOR_ACCELEROMETER,
SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onStop() {
sm.unregisterListener(this);
super.onStop();
}
public Location alig = null;
class MyLocationListener implements LocationListener {
public Location gLoc = null;
public Location mLoc = null;
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
if (location != null) {
synchronized (this) {
// This needs to stop getting the location data and save the battery power.
//locManager.removeUpdates(locListener);
alig = location;
String longitude = "Longitude: " + location.getLongitude();
String latitude = "Latitude: " + location.getLatitude();
String altitiude = "Altitiude: " + location.getAltitude();
String accuracy = "Accuracy: " + location.getAccuracy();
String time = "Time: " + location.getTime();
//editTextShowLocation.setText(londitude + "\n" + latitude + "\n" + altitiude + "\n" + accuracy + "\n" + time);
//progress.setVisibility(View.GONE);
xView1.setText("X: " + longitude);
yView1.setText("Y: " + latitude);
zView1.setText("Z: " + altitiude);
}
}
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
}