谷歌地圖上的駕駛路徑

Question

我想在谷歌地圖上使用android繪製路徑我在網上發現這個代碼，但我得到一些錯誤，我無法修復it.It創建類爲RoadProvider的點和類，但我感到困惑內置的類分，他創造了it.Here點，這是錯誤

Description Resource Path Location Type 
mDescription cannot be resolved or is not a field RoadProvider.java /sbn/src/sbn/project/gp line 103 Java Problem 
mIconUrl cannot be resolved or is not a field RoadProvider.java /sbn/src/sbn/project/gp line 109 Java Problem 
mLatitude cannot be resolved or is not a field RoadProvider.java /sbn/src/sbn/project/gp line 117 Java Problem 
mLongitude cannot be resolved or is not a field RoadProvider.java /sbn/src/sbn/project/gp line 118 Java Problem 
mName cannot be resolved or is not a field RoadProvider.java /sbn/src/sbn/project/gp line 90 Java Problem 
The method addPoint(Point[]) in the type KMLHandler is not applicable for the arguments (Point[]) RoadProvider.java /sbn/src/sbn/project/gp line 68 Java Problem 
The method addPoint(Point[]) in the type KMLHandler is not applicable for the arguments (Point[]) RoadProvider.java /sbn/src/sbn/project/gp line 69 Java Problem 

ANA這裏是代碼

package sbn.project.gp; 

public class Point { 

    String mName; 
    String mDescription; 
    String mIconUrl; 
    double mLatitude; 
    double mLongitude; 
} 

而且這個RoadProvider類

public class RoadProvider { 

     public static Road getRoute(InputStream is) { 
      KMLHandler handler = new KMLHandler(); 
      try { 
        SAXParser parser = SAXParserFactory.newInstance().newSAXParser(); 
        parser.parse(is, handler); 
      } catch (ParserConfigurationException e) { 
        e.printStackTrace(); 
      } catch (SAXException e) { 
        e.printStackTrace(); 
      } catch (IOException e) { 
        e.printStackTrace(); 
      } 
      return handler.mRoad; 
    } 

    public static String getUrl(double fromLat, double fromLon, double toLat, 
        double toLon) {// connect to map web service 
      StringBuffer urlString = new StringBuffer(); 
      urlString.append("http://maps.google.com/maps?f=d&hl=en"); 
      urlString.append("&saddr=");// from 
      urlString.append(Double.toString(fromLat)); 
      urlString.append(","); 
      urlString.append(Double.toString(fromLon)); 
      urlString.append("&daddr=");// to 
      urlString.append(Double.toString(toLat)); 
      urlString.append(","); 
      urlString.append(Double.toString(toLon)); 
      urlString.append("&ie=UTF8&0&om=0&output=kml"); 
      return urlString.toString(); 
    } 
    } 

    class KMLHandler extends DefaultHandler { 
    Road mRoad; 
    boolean isPlacemark; 
    boolean isRoute; 
    boolean isItemIcon; 
    private Stack mCurrentElement = new Stack(); 
    private String mString; 

    public KMLHandler() { 
      mRoad = new Road(); 
    } 

    public void startElement(String uri, String localName, String name, 
        Attributes attributes) throws SAXException { 
      mCurrentElement.push(localName); 
      if (localName.equalsIgnoreCase("Placemark")) { 
        isPlacemark = true; 

        mRoad.mPoints=addPoint(mRoad.mPoints);//there is an error here 
        mRoad.mPoints = addPoint(mRoad.mPoints);//there is an error here 
      } else if (localName.equalsIgnoreCase("ItemIcon")) { 
        if (isPlacemark) 
          isItemIcon = true; 
      } 
      mString = new String(); 
    } 

    public void characters(char[] ch, int start, int length) 
        throws SAXException { 
      String chars = new String(ch, start, length).trim(); 
      mString = mString.concat(chars); 
    } 

    public void endElement(String uri, String localName, String name) 
        throws SAXException { 
      if (mString.length() > 0) { 
        if (localName.equalsIgnoreCase("name")) { 
          if (isPlacemark) { 
            isRoute = mString.equalsIgnoreCase("Route"); 
            if (!isRoute) { 
              mRoad.mPoints[mRoad.mPoints.length - 1].mName = mString; //there is an error here 
            } 
          } else { 
            mRoad.mName = mString; 
          } 
        } else if (localName.equalsIgnoreCase("color") && !isPlacemark) { 
          mRoad.mColor = Integer.parseInt(mString, 16); 
        } else if (localName.equalsIgnoreCase("width") && !isPlacemark) { 
          mRoad.mWidth = Integer.parseInt(mString); 
        } else if (localName.equalsIgnoreCase("description")) { 
          if (isPlacemark) { 
            String description = cleanup(mString); 
            if (!isRoute) 
              mRoad.mPoints[mRoad.mPoints.length - 1].mDescription = description;//there is an error here 
            else 
              mRoad.mDescription = description;//there is an error here 
          } 
        } else if (localName.equalsIgnoreCase("href")) { 
          if (isItemIcon) { 
            mRoad.mPoints[mRoad.mPoints.length - 1].mIconUrl = mString; 
          } 
        } else if (localName.equalsIgnoreCase("coordinates")) { 
          if (isPlacemark) { 
            if (!isRoute) { 
              String[] xyParsed = split(mString, ","); 
              double lon = Double.parseDouble(xyParsed[0]); 
              double lat = Double.parseDouble(xyParsed[1]); 
              mRoad.mPoints[mRoad.mPoints.length - 1].mLatitude = lat; 
              mRoad.mPoints[mRoad.mPoints.length - 1].mLongitude = lon; 
            } else { 
              String[] coodrinatesParsed = split(mString, " "); 
              int lenNew = coodrinatesParsed.length; 
              int lenOld = mRoad.mRoute.length; 
              double[][] temp = new double[lenOld + lenNew][2]; 
              for (int i = 0; i < lenOld; i++) { 
                temp[i] = mRoad.mRoute[i]; 
              } 
              for (int i = 0; i < lenNew; i++) { 
                String[] xyParsed = split(coodrinatesParsed[i], ","); 
                for (int j = 0; j < 2 && j < xyParsed.length; j++) 
                  temp[lenOld + i][j] = Double 
                      .parseDouble(xyParsed[j]); 
              } 
              mRoad.mRoute = temp; 
            } 
          } 
        } 
      } 
      mCurrentElement.pop(); 
      if (localName.equalsIgnoreCase("Placemark")) { 
        isPlacemark = false; 
        if (isRoute) 
          isRoute = false; 
      } else if (localName.equalsIgnoreCase("ItemIcon")) { 
        if (isItemIcon) 
          isItemIcon = false; 
      } 


     return value; 
    } 

    public Point[] addPoint(Point[] Points) { 
      Point[] result = new Point[Points.length + 1]; 
      for (int i = 0; i < Points.length; i++) 
      { result[i] = Points[i];} 
      result[Points.length] = new Point(); 
      return result; 
    } 

Answer 1

請參閱此link在您的應用程序中繪製行車路線。您只需在項目中添加鏈接中的四個類，並在需要顯示路徑時調用以下行。

SharedData data = SharedData.getInstance(); 
data.setAPIKEY("0RUTLH7cqd6yrZ0FdS0NfQMO3lioiCbnH-BpNQQ");//set your map key here 
data.setSrc_lat(17);//set your src lat 
data.setSrc_lng(78);//set your src lng 
data.setDest_lat(18);//set your dest lat 
data.setDest_lng(77);//set your dest lng 
startActivity(new Intent(YourActivity.this,RoutePath.class));//add RoutePath in your manifeast file 

//還允許添加到您的manifeast文件