I have problem occuring in my application.. Using XML file i am getting geopoints to draw the path between two locations..but it only shows me the route if the distance is less than 300 kilometers .. otherwise it doesnt draw full path..
我的申请有困难。使用XML文件，我得到了地理位置来绘制两个位置之间的路径。但是如果距离小于300公里，它只能告诉我路线。否则它不会画出完整的路径。
any solution for dividing the xml file in chunks..or any alternatives..because the directions it gives are perfect even for long distance...then what the problem is ?? i cant understand..
任何将xml文件分割成块的解决方案。或任何替代. .因为它给出的方向是完美的，即使是很长的距离……那么问题是什么呢?我不能理解. .
please help..
请帮助. .
EDITED : I have Found that there is a problem in KML file. If there is a long Distance it is providing two line string tag each having co-ordinates list of full path divided into parts. as follows
编辑:我发现KML文件有问题。如果有很长的距离，它提供了两行字符串标记，每一行都有被分割成部分的完整路径的坐标列表。如下
<GeometryCollection><LineString><coordinates>70.799640,22.283370,...</coordinates> </LineString><LineString><coordinates>73.005940,21.536300,....</coordinates> </LineString></GeometryCollection>
> < GeometryCollection > < LineString > <坐标70.799640,22.283370,……< 坐标> < / LineString > < LineString > <坐标> 73.005940,21.536300,....< /坐标> < / LineString > < / GeometryCollection >
thats why it will draw a Route on map only of the second half of the String.. so.. anybody know how to solve this..
这就是为什么它只在地图的下半部分画一条路线。所以. .谁知道怎么解决这个问题。
EDITED :-
编辑:
public class DrivingDirectionsGoogleKML extends DrivingDirections
{
@Override
protected void startDrivingTo (GeoPoint startPoint, GeoPoint endPoint, Mode mode, IDirectionsListener listener)
{
new LoadDirectionsTask(startPoint, endPoint).execute(mode);
}
private class LoadDirectionsTask extends AsyncTask<Mode, Void, RouteImpl>
{
private static final String BASE_URL = "http://maps.google.com/maps?f=d&hl=en";
private static final String ELEMENT_PLACEMARK = "Placemark";
private static final String ELEMENT_NAME = "name";
private static final String ELEMENT_DESC = "description";
private static final String ELEMENT_POINT = "Point";
private static final String ELEMENT_ROUTE = "Route";
private static final String ELEMENT_GEOM = "GeometryCollection";
private GeoPoint startPoint;
private GeoPoint endPoint;
public LoadDirectionsTask (GeoPoint startPoint, GeoPoint endPoint)
{
this.startPoint = startPoint;
this.endPoint = endPoint;
}
@Override
protected void onPreExecute()
{
super.onPreExecute();
}
@Override
protected RouteImpl doInBackground(Mode... params)
{
// Connect to the Google Maps web service that will return a KML string
// containing the directions from one point to another.
//
StringBuilder urlString = new StringBuilder();
urlString
.append(BASE_URL)
.append("&saddr=")
.append(startPoint.getLatitudeE6() / 1E6)
.append(",")
.append(startPoint.getLongitudeE6() / 1E6)
.append("&daddr=")
.append(endPoint.getLatitudeE6() / 1E6)
.append(",")
.append(endPoint.getLongitudeE6() / 1E6)
.append("&ie=UTF8&0&om=0&output=kml");
if (params[0] == Mode.WALKING)
{
urlString.append("&dirflg=w");
}
RouteImpl route = null;
try
{
URL url = new URL (urlString.toString());
Log.i("-------- Url",url.toString());
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setDoOutput(true);
connection.setDoInput(true);
connection.connect();
route = parseResponse (connection.getInputStream());
}
catch (Exception e)
{
route = null;
}
return route;
}
private RouteImpl parseResponse(InputStream inputStream) throws Exception
{
// Parse the KML file returned by the Google Maps web service
// using the default XML DOM parser.
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(inputStream);
NodeList placemarkList = document.getElementsByTagName(ELEMENT_PLACEMARK);
// Get the list of placemarks to plot along the route.
List<Placemark> placemarks = new ArrayList<Placemark>();
for (int i = 0; i < placemarkList.getLength(); i++)
{
PlacemarkImpl placemark = parsePlacemark (placemarkList.item(i));
if (placemark != null) {
placemarks.add(placemark);
}
}
// Get the route defining the driving directions.
RouteImpl route = parseRoute (placemarkList);
route.setPlacemarks(placemarks);
return route;
}
private PlacemarkImpl parsePlacemark(Node item)
{
PlacemarkImpl placemark = new PlacemarkImpl ();
boolean isRouteElement = false;
NodeList children = item.getChildNodes();
for (int i = 0; i < children.getLength(); i++)
{
Node node = children.item(i);
if (node.getNodeName().equals(ELEMENT_NAME))
{
String name = node.getFirstChild().getNodeValue();
if (name.equals(ELEMENT_ROUTE))
{
isRouteElement = true;
}
else
{
isRouteElement = false;
placemark.setInstructions(name);
}
}
else if (node.getNodeName().equals(ELEMENT_DESC))
{
if (!isRouteElement)
{
String distance = node.getFirstChild().getNodeValue();
placemark.setDistance(distance.substring(3).replace(" ", " "));
}
}
else if (node.getNodeName().equals(ELEMENT_POINT))
{
if (!isRouteElement)
{
String coords = node.getFirstChild().getFirstChild().getNodeValue();
String[] latlon = coords.split(",");
placemark.setLocation(new GeoPoint ((int) (Double.parseDouble(latlon[1]) * 1E6),(int) (Double.parseDouble(latlon[0]) * 1E6)));
}
}
}
return isRouteElement ? null : placemark;
}
private RouteImpl parseRoute(NodeList placemarkList)
{
RouteImpl route = null;
for (int i = 0; i < placemarkList.getLength(); i++)
{
// Iterate through all the <Placemark> KML tags to find the one
// whose child <name> tag is "Route".
//
Node item = placemarkList.item(i);
NodeList children = item.getChildNodes();
for (int j = 0; j < children.getLength(); j++)
{
Node node = children.item(j);
if (node.getNodeName().equals(ELEMENT_NAME))
{
String name = node.getFirstChild().getNodeValue();
if (name.equals(ELEMENT_ROUTE))
{
route = parseRoute (item);
break;
}
}
}
}
return route;
}
private RouteImpl parseRoute(Node item)
{
RouteImpl route = new RouteImpl ();
NodeList children = item.getChildNodes();
for (int i = 0; i < children.getLength(); i++)
{
Node node = children.item(i);
if (node.getNodeName().equals(ELEMENT_DESC))
{
// Get the value of the <description> KML tag.
String distance = node.getFirstChild().getNodeValue();
route.setTotalDistance(distance.split("<br/>")[0].substring(10).replace(" ", " "));
}
else if (node.getNodeName().equals(ELEMENT_GEOM)) //Here Reading Co-Ordinates..///
{
String path = node.getFirstChild().getFirstChild().getFirstChild().getNodeValue();
String[] pairs = path.split(" ");
// For each coordinate, get its {latitude, longitude} values and add the corresponding geographical point to the route.
List<GeoPoint> geoPoints = new ArrayList<GeoPoint>();
for (int p = 0; p < pairs.length; p++)
{
String[] coords = pairs[p].split(",");
GeoPoint geoPoint = new GeoPoint ((int) (Double.parseDouble(coords[1]) * 1E6),(int) (Double.parseDouble(coords[0]) * 1E6));
geoPoints.add (geoPoint);
}
route.setGeoPoints(geoPoints);
}
}
return route;
}
protected void onPostExecute (RouteImpl route)
{
if (route == null)
{
DrivingDirectionsGoogleKML.this.onDirectionsNotAvailable();
}
else
{
DrivingDirectionsGoogleKML.this.onDirectionsAvailable(route);
}
}
}
}
1 个解决方案
#1
8
I have Found Solution For it.. Created NodeList of <GeometryCollection>....</GeometryCollection> and it will provide all co-ordinates between two locations..
我已经找到解决办法了。创建< GeometryCollection > ....的节点列表这将提供两个地点之间的所有坐标。
private RouteImpl parseRoute(Node item)
{
RouteImpl route = new RouteImpl ();
NodeList children = item.getChildNodes();
for (int i = 0; i < children.getLength(); i++)
{
Node node = children.item(i);
if (node.getNodeName().equals(ELEMENT_DESC))
{
// Get the value of the <description> KML tag.
//
String distance = node.getFirstChild().getNodeValue();
route.setTotalDistance(distance.split("<br/>")[0].substring(10).replace(" ", " "));
}
else if (node.getNodeName().equals(ELEMENT_GEOM))
{
// Get the space-separated coordinates of the geographical points defining the route.
//
List<GeoPoint> geoPoints = new ArrayList<GeoPoint>();
// Create a NodeList here ..
NodeList geoMetryChildren = node.getChildNodes();
for(int k=0;k<geoMetryChildren.getLength();k++)
{
Node geoMetryChildrenNode = geoMetryChildren.item(k);
String path = geoMetryChildrenNode.getFirstChild().getFirstChild().getNodeValue();
String[] pairs = path.split(" ");
for (int p = 0; p < pairs.length; p++)
{
String[] coords = pairs[p].split(",");
GeoPoint geoPoint = new GeoPoint ((int) (Double.parseDouble(coords[1]) * 1E6),(int) (Double.parseDouble(coords[0]) * 1E6));
geoPoints.add (geoPoint);
}
}
route.setGeoPoints(geoPoints);
}
}
return route;
}
#1
8
I have Found Solution For it.. Created NodeList of <GeometryCollection>....</GeometryCollection> and it will provide all co-ordinates between two locations..
我已经找到解决办法了。创建< GeometryCollection > ....的节点列表这将提供两个地点之间的所有坐标。
private RouteImpl parseRoute(Node item)
{
RouteImpl route = new RouteImpl ();
NodeList children = item.getChildNodes();
for (int i = 0; i < children.getLength(); i++)
{
Node node = children.item(i);
if (node.getNodeName().equals(ELEMENT_DESC))
{
// Get the value of the <description> KML tag.
//
String distance = node.getFirstChild().getNodeValue();
route.setTotalDistance(distance.split("<br/>")[0].substring(10).replace(" ", " "));
}
else if (node.getNodeName().equals(ELEMENT_GEOM))
{
// Get the space-separated coordinates of the geographical points defining the route.
//
List<GeoPoint> geoPoints = new ArrayList<GeoPoint>();
// Create a NodeList here ..
NodeList geoMetryChildren = node.getChildNodes();
for(int k=0;k<geoMetryChildren.getLength();k++)
{
Node geoMetryChildrenNode = geoMetryChildren.item(k);
String path = geoMetryChildrenNode.getFirstChild().getFirstChild().getNodeValue();
String[] pairs = path.split(" ");
for (int p = 0; p < pairs.length; p++)
{
String[] coords = pairs[p].split(",");
GeoPoint geoPoint = new GeoPoint ((int) (Double.parseDouble(coords[1]) * 1E6),(int) (Double.parseDouble(coords[0]) * 1E6));
geoPoints.add (geoPoint);
}
}
route.setGeoPoints(geoPoints);
}
}
return route;
}