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我正在開發一個使用arcgis的應用程序，我想在marker上顯示當前位置的地圖。我從gps獲取緯度lng值。我在地圖上顯示標記時遇到問題，即標記顯示不在地圖中，它沒有顯示在map.Please當前位置的任何一個解決我的問題如何將GPS Lat Lng座標轉換爲Arcgis X，Y值？
我Mainclass與ArcGIS地圖
GPSTracker gpsTracker=new GPSTracker(LaunchingMapActivity.this);
double locx = gpsTracker.getLatitude();
double locy = gpsTracker.getLongitude();
Log.e("locx",""+locx);
Log.e("locy",""+locy);
Point mapPoint=new Point(locx,locy);
Point wgspoint=mMapView.toMapPoint(mapPoint);
Point currentPoint=mMapView.toMapPoint(wgspoint);
Point mapPoint = (Point) GeometryEngine.project(currentPoint,
SpatialReference.create(4322),
mMapView.getSpatialReference());
Unit mapUnit = mMapView.getSpatialReference().getUnit();
double SEARCH_RADIUS = 0;
double zoomWidth = Unit.convertUnits(
SEARCH_RADIUS, Unit.create(LinearUnit.Code.MILE_US),
mapUnit);
Envelope zoomExtent = new Envelope(mapPoint, zoomWidth,
zoomWidth);
mMapView.setExtent(zoomExtent);
gLayer = new GraphicsLayer();
PictureMarkerSymbol symbol = new
PictureMarkerSymbol(getResources().getDrawable(R.drawable.markerpointblue));
Graphic graphic = new Graphic(mapPoint, symbol);
//Graphic point=new Graphic(new Point(x, y),new
// SimpleMarkerSymbol(Color.CYAN,20,STYLE.CIRCLE);
roadGeometiesList.add(graphic.getGeometry());
Geometry[] geoArr = roadGeometiesList
.toArray(new Geometry[roadGeometiesList.size()]);
share.setGeoArr(geoArr);
gLayer.addGraphic(graphic);
mMapView .addLayer(gLayer);
}
My GpsTracker
package au.com.ipptechnologies.gps;
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;
public class GPSTracker extends Service implements LocationListener {
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
double speed;
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public GPSTracker(Context context) {
this.mContext = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setPowerRequirement(Criteria.POWER_LOW); // Chose your desired power consumption level.
criteria.setAccuracy(Criteria.ACCURACY_FINE); // Choose your accuracy requirement.
criteria.setSpeedRequired(true);
criteria.setSpeedAccuracy(Criteria.ACCURACY_FINE);// Chose if speed for first location fix is required.
criteria.setAltitudeRequired(false); // Choose if you use altitude.
criteria.setBearingRequired(false); // Choose if you use bearing.
criteria.setCostAllowed(false); // Choose if this provider can waste money :-)
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
this.canGetLocation = true;
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
// locationManager.getBestProvider(criteria, true);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
}
return location;
}
/**
* Stop using GPS listener Calling this function will stop using GPS in your
* app.
* */
public void stopUsingGPS() {
if (locationManager != null) {
locationManager.removeUpdates(GPSTracker.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude() {
if (location != null) {
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude() {
if (location != null) {
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
public double getCurrentSpeed(){
if (location != null) {
if(location.hasSpeed()){
Log.e("HasSpeed", ""+location.hasSpeed());
speed = location.getSpeed();
}
}
return speed;
}
/**
* Function to check GPS/wifi enabled
*
* @return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog On pressing Settings button will
* lauch Settings Options
* */
public void showSettingsAlert() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting DialogHelp Title
alertDialog.setTitle("GPS is settings");
// Setting DialogHelp Message
alertDialog
.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(
Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
float bestAccuracy = -1f;
if (location.getAccuracy() != 0.0f
&& (location.getAccuracy() < bestAccuracy) || bestAccuracy == -1f) {
locationManager.removeUpdates(this);
}
bestAccuracy = location.getAccuracy();
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
public float getAccurecy()
{
return location.getAccuracy();
}
}