вот пример использования javax.microedition.location
взятый
здесь
после его ковыряния написал либу к MP
но в нем тоже есть "костыли" - не ясна надобность сбрасывать ГПС постоянно.
import java.util.Timer;
import java.util.TimerTask;
import javax.microedition.location.Criteria;
import javax.microedition.location.Location;
import javax.microedition.location.LocationException;
import javax.microedition.location.LocationListener;
import javax.microedition.location.LocationProvider;
import javax.microedition.location.QualifiedCoordinates;
import net.rim.device.api.system.Application;
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.Ui;
import net.rim.device.api.ui.UiEngine;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.component.RichTextField;
import net.rim.device.api.ui.container.MainScreen;
import bbtracker.uitl.BBTHTTPClient;
public class BBTMainScreen extends MainScreen {
public final static String LOCATION_URL = "YOUR SCRIPT LOCATION";
private RichTextField logField;
private String log;
private long lastGPSRead;
public BBTMainScreen() {
log = "";
setTitle(new LabelField("BBTracker GPS Fix", LabelField.ELLIPSIS | LabelField.USE_ALL_WIDTH));
ButtonField btn = new ButtonField("follow logs", ButtonField.CONSUME_CLICK);
btn.setChangeListener(new ButtonListener());
this.add(btn);
logField = new RichTextField("asdf");
this.add(logField);
lastGPSRead = System.currentTimeMillis();
new LocationTracker();
}
public boolean onClose() {
Application.getApplication().requestBackground();
return false;
}
final class ButtonListener implements FieldChangeListener {
public void fieldChanged(Field field, int context) {
UiEngine ui = Ui.getUiEngine();
Screen screen = new Dialog(Dialog.D_OK, BBTMainScreen.this.log, Dialog.OK,
Bitmap.getPredefinedBitmap(Bitmap.EXCLAMATION), Manager.VERTICAL_SCROLL);
ui.queueStatus(screen, 1, true);
}
}
class LocationTracker extends TimerTask {
private double longitude, latitude;
private Timer timer;
private LocationProvider provider;
public LocationTracker() {
timer = new Timer();
resetGPS();
timer.schedule(this, 0, 60000);
}
public void resetGPS() {
try {
if(provider != null) {
provider.setLocationListener(null, 0, 0, 0);
provider.reset();
provider = null;
}
Criteria criteria = new Criteria();
criteria.setHorizontalAccuracy(1000);
criteria.setVerticalAccuracy(1000);
criteria.setCostAllowed(false);
// criteria.setAltitudeRequired(false);
// criteria.setSpeedAndCourseRequired(false);
// criteria.setAddressInfoRequired(false);
criteria.setPreferredPowerConsumption(Criteria.POWER_USAGE_LOW);
provider = LocationProvider.getInstance(criteria);
provider.setLocationListener(new MyLocationListener(), 10, -1, -1);
// reset the gps counter so we wait another 5 mins before a reset
lastGPSRead = System.currentTimeMillis();
} catch(Exception e) { log = e.toString() + log; }
log = "reset gps\n" + log;
}
public void run() {
if(log.length() > 3000) {
log = log.substring(log.length() - 3000);
}
if(System.currentTimeMillis() - lastGPSRead > 300000) {
BBTHTTPClient.getPage(LOCATION_URL + "?longitude=-1&latitude=-1");
resetGPS();
BBTHTTPClient.getPage(LOCATION_URL + "?longitude=-2&latitude=-2");
}
log = longitude + "," + latitude + "\n" + log;
BBTMainScreen.this.logField.setText(longitude + "," + latitude + "\n");
log = BBTHTTPClient.getPage(LOCATION_URL + "?longitude=" + longitude + "&latitude=" + latitude).trim() + log;
}
private class MyLocationListener implements LocationListener {
public void locationUpdated(LocationProvider provider, Location location)
{
if(location != null && location.isValid())
{
log = "got valid coords\n" + log;
QualifiedCoordinates qc = location.getQualifiedCoordinates();
try {
// TODO: not thread safe (assignment should be done at one time)
LocationTracker.this.longitude = qc.getLongitude();
LocationTracker.this.latitude = qc.getLatitude();
lastGPSRead = System.currentTimeMillis();
} catch(Exception e) { log = e.toString() + log; }
}
else
{
log = "location is not valid..\n" + log;
}
}
public void providerStateChanged(LocationProvider provider, int newState) {
// TODO: if provider was disabled, then disable reporting
log = "state changed: " + newState + "\n" + log;
LocationTracker.this.resetGPS();
// try {
// provider.setLocationListener(null, 0, 0, 0);
// provider.reset();
// provider = null;
// provider = LocationProvider.getInstance(new Criteria());
// provider.setLocationListener(new MyLocationListener(), 10, -1, -1);
// } catch(Exception e) { log = e.toString() + log; }
}
}
}
}