Wie zeichne ich einen Pfad auf einer Karte mit einer kml-Datei?

Kann ich kml-Dateien analysieren, um Pfade oder Punkte in Android anzuzeigen? Könnten Sie mir bitte dabei helfen?

Dies ist kml Beispielcode, den ich in Android Google Map anzeigen möchte:

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<name>Paths</name>
<description>Examples of paths. Note that the tessellate tag is by default
  set to 0. If you want to create tessellated lines, they must be authored
  (or edited) directly in KML.</description>
<Style id="yellowLineGreenPoly">
  <LineStyle>
    <color>7f00ffff</color>
    <width>4</width>
  </LineStyle>
  <PolyStyle>
    <color>7f00ff00</color>
  </PolyStyle>
</Style>
<Placemark>
  <name>Absolute Extruded</name>
  <description>Transparent green wall with yellow outlines</description>
  <styleUrl>#yellowLineGreenPoly</styleUrl>
  <LineString>
    <extrude>1</extrude>
    <tessellate>1</tessellate>
    <altitudeMode>absolute</altitudeMode>
    <coordinates> -112.2550785337791,36.07954952145647,2357
      -112.2549277039738,36.08117083492122,2357
      -112.2552505069063,36.08260761307279,2357
      -112.2564540158376,36.08395660588506,2357
      -112.2580238976449,36.08511401044813,2357
      -112.2595218489022,36.08584355239394,2357
      -112.2608216347552,36.08612634548589,2357
      -112.262073428656,36.08626019085147,2357
      -112.2633204928495,36.08621519860091,2357
      -112.2644963846444,36.08627897945274,2357
      -112.2656969554589,36.08649599090644,2357 
    </coordinates>
    <LineString>
    </Placemark>
    </Document>
    </kml>

Wenn ich diese Datei in eine Standard-Web-Google-Karte lade, wird sie gut angezeigt, aber wenn ich dasselbe mit Android-Google-Karte versuche, funktioniert dies nicht. Es bringt mich nur zu einigen Orten und das war's. Ich dachte daran, die Hörerklasse zu wechseln. Derzeit sieht es so aus:

private class MyLocationListener implements LocationListener 
{
    @Override
    public void onLocationChanged(Location loc) {
        if (loc != null) {
            latitude = (loc.getLatitude() * 1E6);
            longitude = (loc.getLongitude() * 1E6);
             Toast.makeText(getBaseContext(), 
                     "Location changed : Lat: " + latitude + 
                     " Lng: " + longitude, 
                     Toast.LENGTH_SHORT).show();

             GeoPoint p = new GeoPoint(
                     (int) (loc.getLatitude() * 1E6), 
                     (int) (loc.getLongitude() * 1E6));

             mc.animateTo(p);
             mapView.invalidate();
           }
    }

//---------------------------------------------------------------
    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub
    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub
    }

    @Override
    public void onStatusChanged(String provider, int status, 
        Bundle extras) {
        //TODO Auto-generated method stub
    }

Kann mir bitte jemand sagen, was ich hier falsch mache?

Im obigen Code geben Sie die kml-Daten, soweit ich sehen kann, nirgendwo in Ihrem Code an Ihre mapView weiter. Um die Route anzuzeigen, sollten Sie die kml-Daten analysieren, dh über den SAX-Parser, und dann die Routenmarkierungen auf der Karte anzeigen.

Im folgenden Code finden Sie ein Beispiel, das jedoch nicht vollständig ist - nur für Sie als Referenz und um sich ein Bild zu machen.

Dies ist eine einfache Bean, die ich verwende, um die Routeninformationen zu speichern, die ich analysieren werde.

package com.myapp.android.model.navigation;

import java.util.ArrayList;
import java.util.Iterator;


public class NavigationDataSet { 

private ArrayList<Placemark> placemarks = new ArrayList<Placemark>();
private Placemark currentPlacemark;
private Placemark routePlacemark;

public String toString() {
    String s= "";
    for (Iterator<Placemark> iter=placemarks.iterator();iter.hasNext();) {
        Placemark p = (Placemark)iter.next();
        s += p.getTitle() + "\n" + p.getDescription() + "\n\n";
    }
    return s;
}

public void addCurrentPlacemark() {
    placemarks.add(currentPlacemark);
}

public ArrayList<Placemark> getPlacemarks() {
    return placemarks;
}

public void setPlacemarks(ArrayList<Placemark> placemarks) {
    this.placemarks = placemarks;
}

public Placemark getCurrentPlacemark() {
    return currentPlacemark;
}

public void setCurrentPlacemark(Placemark currentPlacemark) {
    this.currentPlacemark = currentPlacemark;
}

public Placemark getRoutePlacemark() {
    return routePlacemark;
}

public void setRoutePlacemark(Placemark routePlacemark) {
    this.routePlacemark = routePlacemark;
}

}

Und der SAX-Handler zum Parsen des kml:

package com.myapp.android.model.navigation;

import android.util.Log;
import com.myapp.android.myapp;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import com.myapp.android.model.navigation.NavigationDataSet;
import com.myapp.android.model.navigation.Placemark;


public class NavigationSaxHandler extends DefaultHandler{ 

 // =========================================================== 
 // Fields 
 // =========================================================== 

 private boolean in_kmltag = false; 
 private boolean in_placemarktag = false; 
 private boolean in_nametag = false;
 private boolean in_descriptiontag = false;
 private boolean in_geometrycollectiontag = false;
 private boolean in_linestringtag = false;
 private boolean in_pointtag = false;
 private boolean in_coordinatestag = false;

 private StringBuffer buffer;

 private NavigationDataSet navigationDataSet = new NavigationDataSet(); 

 // =========================================================== 
 // Getter & Setter 
 // =========================================================== 

 public NavigationDataSet getParsedData() {
      navigationDataSet.getCurrentPlacemark().setCoordinates(buffer.toString().trim());
      return this.navigationDataSet; 
 } 

 // =========================================================== 
 // Methods 
 // =========================================================== 
 @Override 
 public void startDocument() throws SAXException { 
      this.navigationDataSet = new NavigationDataSet(); 
 } 

 @Override 
 public void endDocument() throws SAXException { 
      // Nothing to do
 } 

 /** Gets be called on opening tags like: 
  * <tag> 
  * Can provide attribute(s), when xml was like: 
  * <tag attribute="attributeValue">*/ 
 @Override 
 public void startElement(String namespaceURI, String localName, 
           String qName, Attributes atts) throws SAXException { 
      if (localName.equals("kml")) { 
           this.in_kmltag = true;
      } else if (localName.equals("Placemark")) { 
           this.in_placemarktag = true; 
           navigationDataSet.setCurrentPlacemark(new Placemark());
      } else if (localName.equals("name")) { 
           this.in_nametag = true;
      } else if (localName.equals("description")) { 
          this.in_descriptiontag = true;
      } else if (localName.equals("GeometryCollection")) { 
          this.in_geometrycollectiontag = true;
      } else if (localName.equals("LineString")) { 
          this.in_linestringtag = true;              
      } else if (localName.equals("point")) { 
          this.in_pointtag = true;          
      } else if (localName.equals("coordinates")) {
          buffer = new StringBuffer();
          this.in_coordinatestag = true;                        
      }
 } 

 /** Gets be called on closing tags like: 
  * </tag> */ 
 @Override 
 public void endElement(String namespaceURI, String localName, String qName) 
           throws SAXException { 
       if (localName.equals("kml")) {
           this.in_kmltag = false; 
       } else if (localName.equals("Placemark")) { 
           this.in_placemarktag = false;

       if ("Route".equals(navigationDataSet.getCurrentPlacemark().getTitle())) 
               navigationDataSet.setRoutePlacemark(navigationDataSet.getCurrentPlacemark());
        else navigationDataSet.addCurrentPlacemark();

       } else if (localName.equals("name")) { 
           this.in_nametag = false;           
       } else if (localName.equals("description")) { 
           this.in_descriptiontag = false;
       } else if (localName.equals("GeometryCollection")) { 
           this.in_geometrycollectiontag = false;
       } else if (localName.equals("LineString")) { 
           this.in_linestringtag = false;              
       } else if (localName.equals("point")) { 
           this.in_pointtag = false;          
       } else if (localName.equals("coordinates")) { 
           this.in_coordinatestag = false;
       }
 } 

 /** Gets be called on the following structure: 
  * <tag>characters</tag> */ 
 @Override 
public void characters(char ch[], int start, int length) { 
    if(this.in_nametag){ 
        if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
        navigationDataSet.getCurrentPlacemark().setTitle(new String(ch, start, length));            
    } else 
    if(this.in_descriptiontag){ 
        if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
        navigationDataSet.getCurrentPlacemark().setDescription(new String(ch, start, length));          
    } else
    if(this.in_coordinatestag){        
        if (navigationDataSet.getCurrentPlacemark()==null) navigationDataSet.setCurrentPlacemark(new Placemark());
        //navigationDataSet.getCurrentPlacemark().setCoordinates(new String(ch, start, length));
        buffer.append(ch, start, length);
    }
} 
}

und eine einfache placeMark Bohne:

package com.myapp.android.model.navigation;

public class Placemark {

String title;
String description;
String coordinates;
String address;

public String getTitle() {
    return title;
}
public void setTitle(String title) {
    this.title = title;
}
public String getDescription() {
    return description;
}
public void setDescription(String description) {
    this.description = description;
}
public String getCoordinates() {
    return coordinates;
}
public void setCoordinates(String coordinates) {
    this.coordinates = coordinates;
}
public String getAddress() {
    return address;
}
public void setAddress(String address) {
    this.address = address;
}

}

Schließlich die Serviceklasse in meinem Modell, die die Berechnung aufruft:

package com.myapp.android.model.navigation;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import com.myapp.android.myapp;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;

import android.util.Log;

public class MapService {

public static final int MODE_ANY = 0;
public static final int MODE_CAR = 1;
public static final int MODE_WALKING = 2;


public static String inputStreamToString (InputStream in) throws IOException {
    StringBuffer out = new StringBuffer();
    byte[] b = new byte[4096];
    for (int n; (n = in.read(b)) != -1;) {
        out.append(new String(b, 0, n));
    }
    return out.toString();
}


public static NavigationDataSet calculateRoute(Double startLat, Double startLng, Double targetLat, Double targetLng, int mode) {
    return calculateRoute(startLat + "," + startLng, targetLat + "," + targetLng, mode);
}

public static NavigationDataSet calculateRoute(String startCoords, String targetCoords, int mode) {
    String urlPedestrianMode = "http://maps.google.com/maps?" + "saddr=" + startCoords + "&daddr="
            + targetCoords + "&sll=" + startCoords + "&dirflg=w&hl=en&ie=UTF8&z=14&output=kml";

    Log.d(myapp.APP, "urlPedestrianMode: "+urlPedestrianMode);

    String urlCarMode = "http://maps.google.com/maps?" + "saddr=" + startCoords + "&daddr="
            + targetCoords + "&sll=" + startCoords + "&hl=en&ie=UTF8&z=14&output=kml";

    Log.d(myapp.APP, "urlCarMode: "+urlCarMode);

    NavigationDataSet navSet = null;
    // for mode_any: try pedestrian route calculation first, if it fails, fall back to car route
    if (mode==MODE_ANY||mode==MODE_WALKING) navSet = MapService.getNavigationDataSet(urlPedestrianMode);
    if (mode==MODE_ANY&&navSet==null||mode==MODE_CAR) navSet = MapService.getNavigationDataSet(urlCarMode);
    return navSet;
}

/**
 * Retrieve navigation data set from either remote URL or String
 * @param url
 * @return navigation set
 */
public static NavigationDataSet getNavigationDataSet(String url) {

    // urlString = "http://192.168.1.100:80/test.kml";
    Log.d(myapp.APP,"urlString -->> " + url);
    NavigationDataSet navigationDataSet = null;
    try
        {           
        final URL aUrl = new URL(url);
        final URLConnection conn = aUrl.openConnection();
        conn.setReadTimeout(15 * 1000);  // timeout for reading the google maps data: 15 secs
        conn.connect();

        /* Get a SAXParser from the SAXPArserFactory. */
        SAXParserFactory spf = SAXParserFactory.newInstance(); 
        SAXParser sp = spf.newSAXParser(); 

        /* Get the XMLReader of the SAXParser we created. */
        XMLReader xr = sp.getXMLReader();

        /* Create a new ContentHandler and apply it to the XML-Reader*/ 
        NavigationSaxHandler navSax2Handler = new NavigationSaxHandler(); 
        xr.setContentHandler(navSax2Handler); 

        /* Parse the xml-data from our URL. */ 
        xr.parse(new InputSource(aUrl.openStream()));

        /* Our NavigationSaxHandler now provides the parsed data to us. */ 
        navigationDataSet = navSax2Handler.getParsedData(); 

        /* Set the result to be displayed in our GUI. */ 
        Log.d(myapp.APP,"navigationDataSet: "+navigationDataSet.toString());

    } catch (Exception e) {
        // Log.e(myapp.APP, "error with kml xml", e);
        navigationDataSet = null;
    }   

    return navigationDataSet;
}

}

Zeichnung:

/**
 * Does the actual drawing of the route, based on the geo points provided in the nav set
 *
 * @param navSet     Navigation set bean that holds the route information, incl. geo pos
 * @param color      Color in which to draw the lines
 * @param mMapView01 Map view to draw onto
 */
public void drawPath(NavigationDataSet navSet, int color, MapView mMapView01) {

    Log.d(myapp.APP, "map color before: " + color);        

    // color correction for dining, make it darker
    if (color == Color.parseColor("#add331")) color = Color.parseColor("#6C8715");
    Log.d(myapp.APP, "map color after: " + color);

    Collection overlaysToAddAgain = new ArrayList();
    for (Iterator iter = mMapView01.getOverlays().iterator(); iter.hasNext();) {
        Object o = iter.next();
        Log.d(myapp.APP, "overlay type: " + o.getClass().getName());
        if (!RouteOverlay.class.getName().equals(o.getClass().getName())) {
            // mMapView01.getOverlays().remove(o);
            overlaysToAddAgain.add(o);
        }
    }
    mMapView01.getOverlays().clear();
    mMapView01.getOverlays().addAll(overlaysToAddAgain);

    String path = navSet.getRoutePlacemark().getCoordinates();
    Log.d(myapp.APP, "path=" + path);
    if (path != null && path.trim().length() > 0) {
        String[] pairs = path.trim().split(" ");

        Log.d(myapp.APP, "pairs.length=" + pairs.length);

        String[] lngLat = pairs[0].split(","); // lngLat[0]=longitude lngLat[1]=latitude lngLat[2]=height

        Log.d(myapp.APP, "lnglat =" + lngLat + ", length: " + lngLat.length);

        if (lngLat.length<3) lngLat = pairs[1].split(","); // if first pair is not transferred completely, take seconds pair //TODO 

        try {
            GeoPoint startGP = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6));
            mMapView01.getOverlays().add(new RouteOverlay(startGP, startGP, 1));
            GeoPoint gp1;
            GeoPoint gp2 = startGP;

            for (int i = 1; i < pairs.length; i++) // the last one would be crash
            {
                lngLat = pairs[i].split(",");

                gp1 = gp2;

                if (lngLat.length >= 2 && gp1.getLatitudeE6() > 0 && gp1.getLongitudeE6() > 0
                        && gp2.getLatitudeE6() > 0 && gp2.getLongitudeE6() > 0) {

                    // for GeoPoint, first:latitude, second:longitude
                    gp2 = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6));

                    if (gp2.getLatitudeE6() != 22200000) { 
                        mMapView01.getOverlays().add(new RouteOverlay(gp1, gp2, 2, color));
                        Log.d(myapp.APP, "draw:" + gp1.getLatitudeE6() + "/" + gp1.getLongitudeE6() + " TO " + gp2.getLatitudeE6() + "/" + gp2.getLongitudeE6());
                    }
                }
                // Log.d(myapp.APP,"pair:" + pairs[i]);
            }
            //routeOverlays.add(new RouteOverlay(gp2,gp2, 3));
            mMapView01.getOverlays().add(new RouteOverlay(gp2, gp2, 3));
        } catch (NumberFormatException e) {
            Log.e(myapp.APP, "Cannot draw route.", e);
        }
    }
    // mMapView01.getOverlays().addAll(routeOverlays); // use the default color
    mMapView01.setEnabled(true);
}

Dies ist die RouteOverlay-Klasse:

package com.myapp.android.activity.map.nav;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.RectF;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.Projection;

public class RouteOverlay extends Overlay { 

private GeoPoint gp1;
private GeoPoint gp2;
private int mRadius=6;
private int mode=0;
private int defaultColor;
private String text="";
private Bitmap img = null;

public RouteOverlay(GeoPoint gp1,GeoPoint gp2,int mode) { // GeoPoint is a int. (6E)
    this.gp1 = gp1;
    this.gp2 = gp2;
    this.mode = mode;
    defaultColor = 999; // no defaultColor
}

public RouteOverlay(GeoPoint gp1,GeoPoint gp2,int mode, int defaultColor) {
    this.gp1 = gp1;
    this.gp2 = gp2;
    this.mode = mode;
    this.defaultColor = defaultColor;
}

public void setText(String t) {
    this.text = t;
}

public void setBitmap(Bitmap bitmap) { 
    this.img = bitmap;
}

public int getMode() {
    return mode;
}

@Override
public boolean draw (Canvas canvas, MapView mapView, boolean shadow, long when) {
    Projection projection = mapView.getProjection();
    if (shadow == false) {
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        Point point = new Point();
        projection.toPixels(gp1, point);
        // mode=1：start
        if(mode==1) {
            if(defaultColor==999)
            paint.setColor(Color.BLACK); // Color.BLUE
            else
            paint.setColor(defaultColor);
            RectF oval=new RectF(point.x - mRadius, point.y - mRadius,
            point.x + mRadius, point.y + mRadius);
            // start point
            canvas.drawOval(oval, paint);
        }
        // mode=2：path
        else if(mode==2) {
            if(defaultColor==999)
            paint.setColor(Color.RED);
            else
            paint.setColor(defaultColor);
            Point point2 = new Point();
            projection.toPixels(gp2, point2);
            paint.setStrokeWidth(5);
            paint.setAlpha(defaultColor==Color.parseColor("#6C8715")?220:120);
            canvas.drawLine(point.x, point.y, point2.x,point2.y, paint);
        }
        /* mode=3：end */
        else if(mode==3) {
            /* the last path */

            if(defaultColor==999)
                paint.setColor(Color.BLACK);  // Color.GREEN
            else
                paint.setColor(defaultColor);

            Point point2 = new Point();
            projection.toPixels(gp2, point2);
            paint.setStrokeWidth(5);
            paint.setAlpha(defaultColor==Color.parseColor("#6C8715")?220:120);
            canvas.drawLine(point.x, point.y, point2.x,point2.y, paint);
            RectF oval=new RectF(point2.x - mRadius,point2.y - mRadius,
            point2.x + mRadius,point2.y + mRadius);
            /* end point */
            paint.setAlpha(255);
            canvas.drawOval(oval, paint);
        }
    }
    return super.draw(canvas, mapView, shadow, when);
}

}

Danke Mathias Lin, getestet und es funktioniert!

Darüber hinaus kann die Beispielimplementierung der Mathias-Methode in Aktivität wie folgt aussehen.

public class DirectionMapActivity extends MapActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.directionmap);

        MapView mapView = (MapView) findViewById(R.id.mapview);
        mapView.setBuiltInZoomControls(true);

        // Acquire a reference to the system Location Manager
        LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

        String locationProvider = LocationManager.NETWORK_PROVIDER;
        Location lastKnownLocation = locationManager.getLastKnownLocation(locationProvider);

        StringBuilder urlString = new StringBuilder();
        urlString.append("http://maps.google.com/maps?f=d&hl=en");
        urlString.append("&saddr=");//from
        urlString.append( Double.toString(lastKnownLocation.getLatitude() ));
        urlString.append(",");
        urlString.append( Double.toString(lastKnownLocation.getLongitude() ));
        urlString.append("&daddr=");//to
        urlString.append( Double.toString((double)dest[0]/1.0E6 ));
        urlString.append(",");
        urlString.append( Double.toString((double)dest[1]/1.0E6 ));
        urlString.append("&ie=UTF8&0&om=0&output=kml");

        try{
            // setup the url
            URL url = new URL(urlString.toString());
            // create the factory
            SAXParserFactory factory = SAXParserFactory.newInstance();
            // create a parser
            SAXParser parser = factory.newSAXParser();
            // create the reader (scanner)
            XMLReader xmlreader = parser.getXMLReader();
            // instantiate our handler
            NavigationSaxHandler navSaxHandler = new NavigationSaxHandler();
            // assign our handler
            xmlreader.setContentHandler(navSaxHandler);
            // get our data via the url class
            InputSource is = new InputSource(url.openStream());
            // perform the synchronous parse           
            xmlreader.parse(is);
            // get the results - should be a fully populated RSSFeed instance, or null on error
            NavigationDataSet ds = navSaxHandler.getParsedData();

            // draw path
            drawPath(ds, Color.parseColor("#add331"), mapView );

            // find boundary by using itemized overlay
            GeoPoint destPoint = new GeoPoint(dest[0],dest[1]);
            GeoPoint currentPoint = new GeoPoint( new Double(lastKnownLocation.getLatitude()*1E6).intValue()
                                                ,new Double(lastKnownLocation.getLongitude()*1E6).intValue() );

            Drawable dot = this.getResources().getDrawable(R.drawable.pixel);
            MapItemizedOverlay bgItemizedOverlay = new MapItemizedOverlay(dot,this);
            OverlayItem currentPixel = new OverlayItem(destPoint, null, null );
            OverlayItem destPixel = new OverlayItem(currentPoint, null, null );
            bgItemizedOverlay.addOverlay(currentPixel);
            bgItemizedOverlay.addOverlay(destPixel);

            // center and zoom in the map
            MapController mc = mapView.getController();
            mc.zoomToSpan(bgItemizedOverlay.getLatSpanE6()*2,bgItemizedOverlay.getLonSpanE6()*2);
            mc.animateTo(new GeoPoint(
                    (currentPoint.getLatitudeE6() + destPoint.getLatitudeE6()) / 2
                    , (currentPoint.getLongitudeE6() + destPoint.getLongitudeE6()) / 2));

        } catch(Exception e) {
            Log.d("DirectionMap","Exception parsing kml.");
        }

    }
    // and the rest of the methods in activity, e.g. drawPath() etc...

MapItemizedOverlay.java

public class MapItemizedOverlay extends ItemizedOverlay{
    private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();
    private Context mContext;

    public MapItemizedOverlay(Drawable defaultMarker, Context context) {
          super(boundCenterBottom(defaultMarker));
          mContext = context;
    }

    public void addOverlay(OverlayItem overlay) {
        mOverlays.add(overlay);
        populate();
    }

    @Override
    protected OverlayItem createItem(int i) {
      return mOverlays.get(i);
    }

    @Override
    public int size() {
      return mOverlays.size();
    }

}

Es gibt jetzt eine Beta-Version des Google Maps KML Importing Utility .

Es ist Teil der Google Maps Android API Utility Library . Wie dokumentiert, können KML-Dateien aus Streams geladen werden

KmlLayer layer = new KmlLayer(getMap(), kmlInputStream, getApplicationContext());

oder lokale Ressourcen

KmlLayer layer = new KmlLayer(getMap(), R.raw.kmlFile, getApplicationContext());

Nachdem Sie einen KmlLayer erstellt haben, rufen Sie addLayerToMap () auf, um die importierten Daten zur Karte hinzuzufügen.

layer.addLayerToMap();

Mathias Lin Code funktioniert wunderbar. Möglicherweise möchten Sie diesen Teil jedoch innerhalb der drawPath-Methode ändern:

 if (lngLat.length >= 2 && gp1.getLatitudeE6() > 0 && gp1.getLongitudeE6() > 0
                    && gp2.getLatitudeE6() > 0 && gp2.getLongitudeE6() > 0) {

GeoPoint kann auch kleiner als Null sein. Ich wechsle zu:

     if (lngLat.length >= 2 && gp1.getLatitudeE6() != 0 && gp1.getLongitudeE6() != 0
                    && gp2.getLatitudeE6() != 0 && gp2.getLongitudeE6() != 0) {

Vielen Dank: D.