地図の2点間に短い道を描きます

Question

私はアプリをしていますGoogle Map android。 私はマップ内の2つのポイントの間に短いパスを描きたい。 しかし、私は知らないどのように私は必要ですか？ 助けてください。本当にありがとうございます。

Answer 1

新しいクラスutil.java

public class Util { 


    private DataBaseHelper dbHelper; 
    private GeoFencApplicationDataset Dataset; 
    private int getId; 

    public static boolean checkConnection(Context mContext) { 

     NetworkInfo info = ((ConnectivityManager) mContext 
       .getSystemService(Context.CONNECTIVITY_SERVICE)) 
       .getActiveNetworkInfo(); 
     if (info == null || !info.isConnected()) { 
      return false; 
     } 
     if (info.isRoaming()) { 
      return true; 
     } 
     return true; 
    } 

    public void DrawPath(Context c, GeoPoint src, GeoPoint dest, int color, 
      MapView mMapView01) { 

     Dataset = (GeoFencApplicationDataset) c.getApplicationContext(); 
     dbHelper = Dataset.getDbHelper(); 

     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()); 

     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) { 
       final String path = doc.getElementsByTagName("GeometryCollection") 
         .item(0).getFirstChild().getFirstChild() 
         .getFirstChild().getNodeValue(); 


       final String[] pairs = path.split(" "); 

       String[] lngLat = pairs[0].split(","); 

       final GeoPoint startGP = new GeoPoint(
         (int) (Double.parseDouble(lngLat[1]) * 1E6), 
         (int) (Double.parseDouble(lngLat[0]) * 1E6)); 
       mMapView01.getOverlays().add(
         new PathOverLay(startGP, startGP, 1)); 
       GeoPoint gp1; 
       GeoPoint gp2 = startGP; 

       for (int i = 1; i < pairs.length; i++) { 
        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 PathOverLay(gp1, gp2, 2, color)); 
        if (getId != 0) { 
         dbHelper.insertTempLatLong(lngLat[1], lngLat[0], getId); 
        } 
        Log.d("xxx", "pair:" + pairs[i]); 

       } 

      } 
     } catch (MalformedURLException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } catch (ParserConfigurationException e) { 
      e.printStackTrace(); 
     } catch (SAXException e) { 
      e.printStackTrace(); 
     } 

    } 

    public double[] getLocation(Context c) { 
     Criteria criteria; 
     String provider; 

     LocationManager locManager = (LocationManager) c 
       .getSystemService(Context.LOCATION_SERVICE); 

     criteria = new Criteria(); 
     criteria.setAccuracy(Criteria.ACCURACY_FINE); 
     criteria.setAccuracy(Criteria.ACCURACY_COARSE); 

     provider = locManager.getBestProvider(criteria, true); 
     double[] loca = new double[2]; 
     // For Latitude & Longitude 

     Location location = locManager.getLastKnownLocation(provider); 
     if (location != null) { 
      loca[0] = location.getLatitude(); 
      loca[1] = location.getLongitude(); 
     } else { 
      loca[0] = 0.0; 
      loca[1] = 0.0; 
     } 
     return loca; 
    } 

    public void setId(int id) { 
     // TODO Auto-generated method stub 
     getId = id; 
    } 

} 

新しいクラスPathOverLay.java

public class PathOverLay extends Overlay { 

    private GeoPoint gp1; 
    private GeoPoint gp2; 
    private int mRadius = 6; 
    private int mode = 0; 
    private int defaultColor; 
    private String text = ""; 
    private Bitmap img = null; 

    public PathOverLay(GeoPoint gp1, GeoPoint gp2, int mode) // GeoPoint is a 
    // int. (6E) 
    { 
     this.gp1 = gp1; 
     this.gp2 = gp2; 
     this.mode = mode; 
     defaultColor = 999; // no defaultColor 

    } 

    public PathOverLay(GeoPoint gp1, GeoPoint gp2, int mode, int defaultColor) { 
     this.gp1 = gp1; 
     this.gp2 = gp2; 
     this.mode = mode; 
     this.defaultColor = defaultColor; 
    } 

    public void setText(String t) { 
     this.text = t; 
    } 

    public void setBitmap(Bitmap bitmap) { 
     this.img = bitmap; 
    } 

    public int getMode() { 
     return mode; 
    } 

    @Override 
    public boolean draw(Canvas canvas, MapView mapView, boolean shadow, 
      long when) { 
     Projection projection = mapView.getProjection(); 
     if (shadow == false) { 
      Paint paint = new Paint(); 
      paint.setAntiAlias(true); 
      Point point = new Point(); 
      projection.toPixels(gp1, point); 

      // mode=1：start 
      if (mode == 1) { 
       if (defaultColor == 999) 
        paint.setColor(Color.BLUE); 
       else 
        paint.setColor(defaultColor); 
//    RectF oval = new RectF(point.x - mRadius, point.y - mRadius, 
//      point.x + mRadius, point.y + mRadius); 
       RectF oval = new RectF(point.x - mRadius, point.y - mRadius, 
         point.x + mRadius, point.y + mRadius); 
       // start point 
       canvas.drawOval(oval, paint); 
      } 
      // mode=2：path 
      else if (mode == 2) { 
       if (defaultColor == 999) 
        paint.setColor(Color.RED); 
       else 
        paint.setColor(defaultColor); 
       Point point2 = new Point(); 
       projection.toPixels(gp2, point2); 
       paint.setStrokeWidth(5); 
       paint.setAlpha(70); 
       canvas.drawLine(point.x, point.y, point2.x, point2.y, paint); 

      } 
      /* mode=3：end */ 
      else if (mode == 3) { 
       /* the last path */ 

       if (defaultColor == 999) 
        paint.setColor(Color.GREEN); 
       else 
        paint.setColor(defaultColor); 
       Point point2 = new Point(); 
       projection.toPixels(gp2, point2); 

       paint.setStrokeWidth(5); 
       paint.setAlpha(120); 
       canvas.drawLine(point.x, point.y, point2.x, point2.y, paint); 
       RectF oval = new RectF(point2.x - mRadius, point2.y - mRadius, 
         point2.x + mRadius, point2.y + mRadius); 
       /* end point */ 
       paint.setAlpha(120); 
       canvas.drawOval(oval, paint); 
      } 
     } 
     return super.draw(canvas, mapView, shadow, when); 
    } 

    // Read more: 
    // http://csie-tw.blogspot.com/2009/06/android-driving-direction-route-path.html#ixzz1hte9kGoi 

} 

最終呼び出し方法... [上のライン/パスを描画するの

util = new Util(); 

     mapOverlays = mapView.getOverlays(); 

     util = new Util(); 
     util.setId(id); 



GeoPoint srcGeoPoint = new GeoPoint((int) (destLat * 1E6), 
         (int) (destLong * 1E6)); 
       GeoPoint destGeoPoint = new GeoPoint((int) (srcLat * 1E6), 
         (int) (srcLong * 1E6)); 

       progrDialog = ProgressDialog.show(AddFenceActivity.this, 
         "", "Please Wait..", true); 

       mapView.getOverlays().add(
         new PathOverLay(srcGeoPoint,destGeoPoint, 2,Color.RED)); 
       util.DrawPath(AddFenceActivity.this, srcGeoPoint, 
         destGeoPoint, Color.RED, mapView); 
       mapView.getController().animateTo(srcGeoPoint); 





public class MapOverLayItem extends ItemizedOverlay<OverlayItem> { 

    private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>(); 
    Context mContext; 

    public MapOverLayItem(Drawable defaultMarker) { 
     super(boundCenterBottom(defaultMarker)); 
     // TODO Auto-generated constructor stub 
    } 

    public void addOverlay(OverlayItem overlay) { 
     mOverlays.add(overlay); 
     populate(); 
    } 

    @Override 
    protected OverlayItem createItem(int i) { 
     // TODO Auto-generated method stub 
     return mOverlays.get(i); 

    } 

    @Override 
    public int size() { 
     // TODO Auto-generated method stub 
     return mOverlays.size(); 

    } 

    public MapOverLayItem(Drawable defaultMarker, Context context) { 
     super(defaultMarker); 
     mContext = context; 
    } 

}