0 
  String uri = "http://maps.google.com/maps?saddr=" + src_lat+","+src_lon+"&daddr="+des_lat1+","+des_lon1;
   Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(uri));
   intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity");
   startActivity(intent);

这是用于在已知源和目的地的纬度和经度的两个位置之间绘制路线的代码。但是在这里我想将我所在位置的经度和纬度替换为src_lonand src_lat，我不知道它的值，并且这个经度和纬度会随着我当前的位置而改变。有可能画出这样的路线吗？

4

3 回答 3

1 
private void DrawPath(GeoPoint src, GeoPoint dest, int color,
                      MapView mMapView01) {

    // Connect to the map web service
    StringBuilder urlString = new StringBuilder();
    urlString.append("http://maps.google.com/maps?f=d&hl=en");
    urlString.append("&saddr=");//from
    urlString.append( Double.toString((double)src.getLatitudeE6()/1.0E6 ));
    urlString.append(",");
    urlString.append( Double.toString((double)src.getLongitudeE6()/1.0E6 ));
    urlString.append("&daddr=");//to
    urlString.append( Double.toString((double)dest.getLatitudeE6()/1.0E6 ));
    urlString.append(",");
    urlString.append( Double.toString((double)dest.getLongitudeE6()/1.0E6 ));
    urlString.append("&ie=UTF8&0&om=0&output=kml");
    Log.d("xxx","URL="+urlString.toString());

    //System.out.println(urlString);
    // Get the KML (XML) document. And parse it to get the coordinates(direction route).
    Document doc = null;
    HttpURLConnection urlConnection= null;
    URL url = null;
    try
    {
        url = new URL(urlString.toString());
        urlConnection=(HttpURLConnection)url.openConnection();
        urlConnection.setRequestMethod("GET");
        urlConnection.setDoOutput(true);
        urlConnection.setDoInput(true);
        urlConnection.connect();

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        doc = db.parse(urlConnection.getInputStream());

        if(doc.getElementsByTagName("GeometryCollection").getLength()>0)
        {
            //String path = doc.getElementsByTagName("GeometryCollection").item(0).getFirstChild().getFirstChild().getNodeName();
            String path = doc.getElementsByTagName(
                "GeometryCollection").item(0).getFirstChild().getFirstChild().getFirstChild().getNodeValue();
            Log.d("xxx","path="+ path);
            String [] pairs = path.split(" ");
            String[] lngLat = pairs[0].split(","); // lngLat[0]=longitude lngLat[1]=latitude lngLat[2]=height
            // Source
            GeoPoint startGP = new GeoPoint((int)(
                Double.parseDouble(lngLat[1])*1E6),
                (int)(Double.parseDouble(lngLat[0])*1E6));
            //mMapView01.getOverlays().add(overlayitem);
            GeoPoint gp1;
            GeoPoint gp2 = startGP;
            for(int i=1; i<pairs.length; i++) // The last one would crash.
            {
                lngLat = pairs[i].split(",");
                gp1 = gp2;
                // watch out! For GeoPoint, first:latitude, second:longitude
                gp2 = new GeoPoint((int)(Double.parseDouble(lngLat[1])*1E6),(int)(Double.parseDouble(lngLat[0])*1E6));
                mMapView01.getOverlays().add(new MapRouteOverlay(gp1,gp2,2,color));
                Log.d("xxx","pair:" + pairs[i]);
            }
            //mMapView01.getOverlays().add(new MapRouteOverlay(dest,dest, 3)); // Use the default color
        }
    }
    catch (MalformedURLException e)
    {
        e.printStackTrace();
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }
    catch (ParserConfigurationException e)
    {
        e.printStackTrace();
    }
    catch (SAXException e)
    {
        e.printStackTrace();
    }
}
于 2012-05-01T04:45:38.197 回答
1

尝试这个：

Intent i = new Intent(android.content.Intent.ACTION_VIEW,
       Uri.parse("google.navigation:q=" +destLat+ ","+destLon+""));
this.startActivity(i);

这是我所知道的最好的解决方案。

于 2012-05-27T06:34:40.917 回答
0

是的，使用位置管理器获取当前位置的纬度和经度。请参阅位置策略并使用Google Directions API获取路线。

于 2012-05-01T04:53:43.857 回答