我编写了一个应用程序，帮助人们找到合适的位置并向目标显示方向。之前，此功能运行良好，但现在绘制路线功能不起作用。我得到的例外是应用程序无法下载然后解析与路由相对应的kml（代码：xmlreader.parse（is）; ），尽管为获取KML而生成的URL是正确的（I在浏览器中测试它 - 例如：https://maps.google.com/maps?f=d&hl=en&saddr=21.04664,105.852203&daddr=21.040527,105.849783&ie=UTF8&om=0&output=kml
我问自己，Google for MapView的方向API是否无法正常工作，或者我错过了一些东西。
这是我获取路线然后生成URL的代码 - 获取KML然后绘制路线。
public void drawPath(GeoPoint from,GeoPoint to, int color, MapView mMapView01) {
NavigationDataSet navSet= new NavigationDataSet();
StringBuilder urlString = new StringBuilder();
urlString.append("http://maps.google.com/maps?f=d&hl=en");
urlString.append("&saddr=");//from
urlString.append( Double.toString((double)from.getLatitudeE6()/1.0E6 ));
urlString.append(",");
urlString.append( Double.toString((double)from.getLongitudeE6()/1.0E6 ));
urlString.append("&daddr=");//to
urlString.append( Double.toString((double)to.getLatitudeE6()/1.0E6 ));
urlString.append(",");
urlString.append( Double.toString((double)to.getLongitudeE6()/1.0E6 ));
urlString.append("&ie=UTF8&0&om=0&output=kml");
Log.v("TEST", urlString.toString());
try{
// setup the url
URL url = new URL(urlString.toString());
// get our data via the url class
InputSource is = new InputSource(url.openConnection().getInputStream());
// DocumentBuilderFactory dbfAdd = DocumentBuilderFactory.newInstance();
// DocumentBuilder dbAdd = dbfAdd.newDocumentBuilder();
// dbAdd.parse(url.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);
// perform the synchronous parse
xmlreader.parse(is);
// get the results - should be a fully populated RSSFeed instance, or null on error
navSet= navSaxHandler.getParsedData();
Log.v("MAP", "input source: " + (is == null));
} catch(Exception e) {
// Log.d("DirectionMap","Exception parsing kml.");
Log.v("DRAW", "Die here");
e.printStackTrace();
}
try {
String distance = navSet.getRoutePlacemark().getDistance();
placeLabelTextView.setText(placeLabel + distance);
} catch (Exception e) {
// TODO: handle exception
}
//hien thi duong di
Log.v("MAP",(navSet.getCurrentPlacemark() != null) + "-des: ");
String path = navSet.getRoutePlacemark().getCoordinates();
String[] pairs = path.trim().split(" ");
String[] lngLat = pairs[0].split(","); // lngLat[0]=longitude lngLat[1]=latitude lngLat[2]=height
try {
GeoPoint startGP = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6));
mMapView01.getOverlays().add(new MyOverLay(startGP, startGP, 1));
GeoPoint gp1;
GeoPoint gp2 = startGP;
int w = (int) (5 * ShowPlaceOnMapsActivity.this.getResources().getDisplayMetrics().density);
for (int i = 1; i < pairs.length; i++) // the last one would be crash
{
lngLat = pairs[i].split(",");
gp1 = gp2;
gp2 = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6));
mMapView01.getOverlays().add(new MyOverLay(gp1, gp2, 2, color,w));
}
mMapView01.getOverlays().add(new MyOverLay(gp2, gp2, 3));
//hien thi cac chi dan
List<Overlay> mapOverlays;
mapOverlays=mMapView01.getOverlays();
String s=new String();
String description=new String();
String name=new String();
Placemark p=new Placemark();
Drawable drawable1=mMapView01.getResources().getDrawable(R.drawable.way_turn_mark);
MyItemizedOverlay itemizedOverlay1 = new MyItemizedOverlay(drawable1, mMapView01);
for (Iterator<Placemark> iter=navSet.getPlacemarks().iterator();iter.hasNext();) {
p = (Placemark)iter.next();
if(!p.getTitle().equals("Route")){
s=p.getCoordinates();
description=p.getDescription();
// Log.v("TEST", "URL: " + p.getAddress());
name=p.getTitle();
lngLat =s.split(",");
gp2= new GeoPoint((int) (Double.parseDouble(lngLat[1])* 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6));
if(description != null)
itemizedOverlay1.addOverlay(new OverlayItem(gp2,name+"\n"+description,""));
else
itemizedOverlay1.addOverlay(new OverlayItem(gp2, name, ""));
}
}
mapOverlays.add(itemizedOverlay1);
mapController.animateTo(new GeoPoint( (startGP.getLatitudeE6() + gp2.getLatitudeE6())/2, (startGP.getLongitudeE6() + gp2.getLongitudeE6())/2 ));
} catch (NumberFormatException e) {
}
}
我获得代码的例外是：
xmlreader.parse（是）;
org.apache.harmony.xml.ExpatParser$ParseException:....... not well-formed
你遇到过这个问题吗？任何帮助和评论都非常感谢。
这是异常堆栈跟踪
07-30 22:06:03.510: VERBOSE/TEST(234): http://maps.google.com/maps?f=d&hl=en&saddr=21.059457,105.843963&daddr=21.052597,105.840636&ie=UTF8&0&om=0&output=kml
07-30 22:06:04.190: VERBOSE/DRAW(234): Die here
07-30 22:06:04.190: WARN/System.err(234): org.apache.harmony.xml.ExpatParser$ParseException: At line 1, column 805: not well-formed (invalid token)
07-30 22:06:04.210: WARN/System.err(234): at org.apache.harmony.xml.ExpatParser.parseFragment(ExpatParser.java:508)
07-30 22:06:04.210: WARN/System.err(234): at org.apache.harmony.xml.ExpatParser.parseDocument(ExpatParser.java:467)
07-30 22:06:04.210: WARN/System.err(234): at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:329)
07-30 22:06:04.210: WARN/System.err(234): at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:302)
07-30 22:06:04.210: WARN/System.err(234): at hust.se.vtio.icompanion.ShowPlaceOnMapsActivity.drawPath(ShowPlaceOnMapsActivity.java:301)
07-30 22:06:04.210: WARN/System.err(234): at hust.se.vtio.icompanion.ShowPlaceOnMapsActivity.onOptionsItemSelected(ShowPlaceOnMapsActivity.java:245)
07-30 22:06:04.210: WARN/System.err(234): at android.app.Activity.onMenuItemSelected(Activity.java:2170)
07-30 22:06:04.210: WARN/System.err(234): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:730)
07-30 22:06:04.210: WARN/System.err(234): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:139)
07-30 22:06:04.210: WARN/System.err(234): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855)
07-30 22:06:04.210: WARN/System.err(234): at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:525)
07-30 22:06:04.220: WARN/System.err(234): at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122)
07-30 22:06:04.220: WARN/System.err(234): at android.view.View.onTouchEvent(View.java:4179)
07-30 22:06:04.220: WARN/System.err(234): at android.widget.TextView.onTouchEvent(TextView.java:6540)
07-30 22:06:04.220: WARN/System.err(234): at android.view.View.dispatchTouchEvent(View.java:3709)
07-30 22:06:04.220: WARN/System.err(234): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
07-30 22:06:04.220: WARN/System.err(234): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
07-30 22:06:04.220: WARN/System.err(234): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
07-30 22:06:04.220: WARN/System.err(234): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
07-30 22:06:04.220: WARN/System.err(234): at android.os.Handler.dispatchMessage(Handler.java:99)
07-30 22:06:04.220: WARN/System.err(234): at android.os.Looper.loop(Looper.java:123)
07-30 22:06:04.220: WARN/System.err(234): at android.app.ActivityThread.main(ActivityThread.java:4363)
07-30 22:06:04.220: WARN/System.err(234): at java.lang.reflect.Method.invokeNative(Native Method)
07-30 22:06:04.220: WARN/System.err(234): at java.lang.reflect.Method.invoke(Method.java:521)
07-30 22:06:04.220: WARN/System.err(234): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-30 22:06:04.220: WARN/System.err(234): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-30 22:06:04.220: WARN/System.err(234): at dalvik.system.NativeStart.main(Native Method)
以下是我在浏览器中打开网址时获得的KML内容
以下是我从浏览器获取的KML文件的内容：
<kml xmlns="http://earth.google.com/kml/2.2">
<Document>
<name>Driving directions to 21.052597,105.840636</name>
<description><![CDATA[]]></description>
<Style id="style3">
<IconStyle>
<Icon>
<href></href>
</Icon>
</IconStyle>
</Style>
<Style id="style2">
<LineStyle>
<color>73FF0000</color>
<width>5</width>
</LineStyle>
</Style>
<Style id="style1">
<IconStyle>
<Icon>
<href></href>
</Icon>
</IconStyle>
</Style>
<Placemark>
<name>From: 21.059457,105.843963</name>
<styleUrl>#style3</styleUrl>
<Point>
<coordinates>105.842567,21.058840,0.000000</coordinates>
</Point>
</Placemark>
<Placemark>
<name>Driving directions to 21.052597,105.840636</name>
<styleUrl>#style2</styleUrl>
<ExtendedData>
<Data name="_SnapToRoads">
<value>true</value>
</Data>
</ExtendedData>
<LineString>
<tessellate>1</tessellate>
<coordinates>
105.842567,21.058840,0.000000
105.842346,21.059200,0.000000
105.841080,21.060551,0.000000
105.840530,21.061300,0.000000
105.840393,21.061399,0.000000
105.839653,21.061701,0.000000
105.839653,21.061701,0.000000
105.838860,21.061159,0.000000
105.838860,21.061159,0.000000
105.838852,21.061050,0.000000
105.838409,21.060699,0.000000
105.838409,21.060699,0.000000
105.838692,21.059879,0.000000
105.840950,21.055691,0.000000
105.840950,21.055691,0.000000
105.840477,21.055571,0.000000
105.839493,21.054930,0.000000
105.839493,21.054930,0.000000
105.839981,21.054060,0.000000
105.840553,21.052561,0.000000
</coordinates>
</LineString>
</Placemark>
<Placemark>
<name>To: 21.052597,105.840636</name>
<styleUrl>#style1</styleUrl>
<Point>
<coordinates>105.840546,21.052563,0.000000</coordinates>
</Point>
</Placemark>
</Document>
</kml>
答案 0 :(得分：3)
自2012年7月27日以来，这种通过解析KML文件从Google中提取Google方向的方式已不再可用（因为Google已经更改了检索Google方向的结构，现在您只能通过JSON或XML获取它），它是时候将代码迁移到JSON而不是KML。
在我自己的问题here中查看答案。