我使用這種方法來繪製在我的應用在地圖上的兩個點之間的路線在Android MapView上繪製兩個GeoPoint之間的路線時出錯?
private void DrawPath(GeoPoint src, GeoPoint dest, int color,
MapView mMapView01) {
// connect to 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());
try
{
URL url = new URL(urlString.toString());
urlString = null;
HttpURLConnection urlConnection=(HttpURLConnection)url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.connect();
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(urlConnection.getInputStream());
if(doc.getElementsByTagName("GeometryCollection").getLength()>0)
{
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
// src
GeoPoint startGP = new GeoPoint((int)(Double.parseDouble(lngLat[1])*1E6),(int)(Double.parseDouble(lngLat[0])*1E6));
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;
// watch out! For GeoPoint, first:latitude, second:longitude
gp2 = new GeoPoint((int)(Double.parseDouble(lngLat[1])*1E6),(int)(Double.parseDouble(lngLat[0])*1E6));
mapRouteOverlay = new MapRouteOverlay(gp1,gp2,2,color);
mMapView01.getOverlays().add(mapRouteOverlay);
Log.d("xxx","pair:" + pairs[i]);
Log.e("Check ","Draw " + mapRouteOverlay);
}
}
}
catch (MalformedURLException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
catch (ParserConfigurationException e)
{
e.printStackTrace();
}
catch (SAXException e)
{
e.printStackTrace();
}
}
這種方法是工作的罰款(從最近三個月)繪製路徑,但形成大約15天它給人的問題,尚未出現/繪製路徑。
我logcat的輸出
08-11 10:15:47.363: W/System.err(401): org.xml.sax.SAXParseException: unterminated entity ref (position:ENTITY_REF &@1:808 in [email protected])
08-11 10:15:47.373: W/System.err(401): at org.apache.harmony.xml.parsers.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:153)
08-11 10:15:47.373: W/System.err(401): at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:110)
08-11 10:15:47.373: W/System.err(401): at com.map.MapMainActivity.DrawPath(MapMainActivity.java:621)
08-11 10:15:47.373: W/System.err(401): at com.map.MapMainActivity.getDirection(MapMainActivity.java:582)
08-11 10:15:47.373: W/System.err(401): at com.map.MapMainActivity$DownloadWebPageTask.onPostExecute(MapMainActivity.java:1318)
08-11 10:15:47.373: W/System.err(401): at com.map.MapMainActivity$DownloadWebPageTask.onPostExecute(MapMainActivity.java:1)
08-11 10:15:47.373: W/System.err(401): at android.os.AsyncTask.finish(AsyncTask.java:417)
08-11 10:15:47.373: W/System.err(401): at android.os.AsyncTask.access$300(AsyncTask.java:127)
08-11 10:15:47.373: W/System.err(401): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)
08-11 10:15:47.373: W/System.err(401): at android.os.Handler.dispatchMessage(Handler.java:99)
08-11 10:15:47.373: W/System.err(401): at android.os.Looper.loop(Looper.java:123)
08-11 10:15:47.383: W/System.err(401): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-11 10:15:47.383: W/System.err(401): at java.lang.reflect.Method.invokeNative(Native Method)
08-11 10:15:47.383: W/System.err(401): at java.lang.reflect.Method.invoke(Method.java:521)
08-11 10:15:47.383: W/System.err(401): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-11 10:15:47.383: W/System.err(401): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-11 10:15:47.383: W/System.err(401): at dalvik.system.NativeStart.main(Native Method)
我不明白是什麼問題? 有幫助嗎?
在此先感謝。
我的應用程序是目前在市場上,這是不好改變應用程序的流程,我必須表現出路徑我目前的活動只有 – 2012-08-11 05:20:28
+1謝謝你的回答 – 2012-08-14 04:50:37