google maps routage api V2 android

Question

J'ai inclus google map dans mon programme android. Mais dans le tutoriel sur le GM android api V2 n'est pas une description sur le routage et comment je peux ajouter ma propre carte google créé.

Quelqu'un connaît un tutoriel pour cela?

Merci beaucoup

Answer 1

Vous pouvez jeter un oeil à une question ressemblante j'ai pas demandé depuis longtemps:

Is there a way to show road directions in Google Map API v2?

Ce que vous devez faire est:

1.Prendre ce code J'ai été donné par @Akexorcist:

package app.akexorcist.googlemapsv2direction; 

    import java.io.InputStream; 
    import java.util.ArrayList; 

    import javax.xml.parsers.DocumentBuilder; 
    import javax.xml.parsers.DocumentBuilderFactory; 

    import org.apache.http.HttpResponse; 
    import org.apache.http.client.HttpClient; 
    import org.apache.http.client.methods.HttpPost; 
    import org.apache.http.impl.client.DefaultHttpClient; 
    import org.apache.http.protocol.BasicHttpContext; 
    import org.apache.http.protocol.HttpContext; 
    import org.w3c.dom.Document; 
    import org.w3c.dom.Node; 
    import org.w3c.dom.NodeList; 

import com.google.android.gms.maps.model.LatLng; 

import android.content.Context; 
import android.util.Log; 

public class GMapV2Direction { 
public final static String MODE_DRIVING = "driving"; 
public final static String MODE_WALKING = "walking"; 

public GMapV2Direction() { } 

public Document getDocument(LatLng start, LatLng end, String mode) { 
    String url = "http://maps.googleapis.com/maps/api/directions/xml?" 
      + "origin=" + start.latitude + "," + start.longitude 
      + "&destination=" + end.latitude + "," + end.longitude 
      + "&sensor=false&units=metric&mode=driving"; 

    try { 
     HttpClient httpClient = new DefaultHttpClient(); 
     HttpContext localContext = new BasicHttpContext(); 
     HttpPost httpPost = new HttpPost(url); 
     HttpResponse response = httpClient.execute(httpPost, localContext); 
     InputStream in = response.getEntity().getContent(); 
     DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder(); 
     Document doc = builder.parse(in); 
     return doc; 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
    return null; 
} 

public String getDurationText (Document doc) { 
    NodeList nl1 = doc.getElementsByTagName("duration"); 
    Node node1 = nl1.item(0); 
    NodeList nl2 = node1.getChildNodes(); 
    Node node2 = nl2.item(getNodeIndex(nl2, "text")); 
    Log.i("DurationText", node2.getTextContent()); 
    return node2.getTextContent(); 
} 

public int getDurationValue (Document doc) { 
    NodeList nl1 = doc.getElementsByTagName("duration"); 
    Node node1 = nl1.item(0); 
    NodeList nl2 = node1.getChildNodes(); 
    Node node2 = nl2.item(getNodeIndex(nl2, "value")); 
    Log.i("DurationValue", node2.getTextContent()); 
    return Integer.parseInt(node2.getTextContent()); 
} 

public String getDistanceText (Document doc) { 
    NodeList nl1 = doc.getElementsByTagName("distance"); 
    Node node1 = nl1.item(0); 
    NodeList nl2 = node1.getChildNodes(); 
    Node node2 = nl2.item(getNodeIndex(nl2, "text")); 
    Log.i("DistanceText", node2.getTextContent()); 
    return node2.getTextContent(); 
} 

public int getDistanceValue (Document doc) { 
    NodeList nl1 = doc.getElementsByTagName("distance"); 
    Node node1 = nl1.item(0); 
    NodeList nl2 = node1.getChildNodes(); 
    Node node2 = nl2.item(getNodeIndex(nl2, "value")); 
    Log.i("DistanceValue", node2.getTextContent()); 
    return Integer.parseInt(node2.getTextContent()); 
} 

public String getStartAddress (Document doc) { 
    NodeList nl1 = doc.getElementsByTagName("start_address"); 
    Node node1 = nl1.item(0); 
    Log.i("StartAddress", node1.getTextContent()); 
    return node1.getTextContent(); 
} 

public String getEndAddress (Document doc) { 
    NodeList nl1 = doc.getElementsByTagName("end_address"); 
    Node node1 = nl1.item(0); 
    Log.i("StartAddress", node1.getTextContent()); 
    return node1.getTextContent(); 
} 

public String getCopyRights (Document doc) { 
    NodeList nl1 = doc.getElementsByTagName("copyrights"); 
    Node node1 = nl1.item(0); 
    Log.i("CopyRights", node1.getTextContent()); 
    return node1.getTextContent(); 
} 

public ArrayList<LatLng> getDirection (Document doc) { 
    NodeList nl1, nl2, nl3; 
    ArrayList<LatLng> listGeopoints = new ArrayList<LatLng>(); 
    nl1 = doc.getElementsByTagName("step"); 
    if (nl1.getLength() > 0) { 
     for (int i = 0; i < nl1.getLength(); i++) { 
      Node node1 = nl1.item(i); 
      nl2 = node1.getChildNodes(); 

      Node locationNode = nl2.item(getNodeIndex(nl2, "start_location")); 
      nl3 = locationNode.getChildNodes(); 
      Node latNode = nl3.item(getNodeIndex(nl3, "lat")); 
      double lat = Double.parseDouble(latNode.getTextContent()); 
      Node lngNode = nl3.item(getNodeIndex(nl3, "lng")); 
      double lng = Double.parseDouble(lngNode.getTextContent()); 
      listGeopoints.add(new LatLng(lat, lng)); 

      locationNode = nl2.item(getNodeIndex(nl2, "polyline")); 
      nl3 = locationNode.getChildNodes(); 
      latNode = nl3.item(getNodeIndex(nl3, "points")); 
      ArrayList<LatLng> arr = decodePoly(latNode.getTextContent()); 
      for(int j = 0 ; j < arr.size() ; j++) { 
       listGeopoints.add(new LatLng(arr.get(j).latitude, arr.get(j).longitude)); 
      } 

      locationNode = nl2.item(getNodeIndex(nl2, "end_location")); 
      nl3 = locationNode.getChildNodes(); 
      latNode = nl3.item(getNodeIndex(nl3, "lat")); 
      lat = Double.parseDouble(latNode.getTextContent()); 
      lngNode = nl3.item(getNodeIndex(nl3, "lng")); 
      lng = Double.parseDouble(lngNode.getTextContent()); 
      listGeopoints.add(new LatLng(lat, lng)); 
     } 
    } 

    return listGeopoints; 
} 

private int getNodeIndex(NodeList nl, String nodename) { 
    for(int i = 0 ; i < nl.getLength() ; i++) { 
     if(nl.item(i).getNodeName().equals(nodename)) 
      return i; 
    } 
    return -1; 
} 

private ArrayList<LatLng> decodePoly(String encoded) { 
    ArrayList<LatLng> poly = new ArrayList<LatLng>(); 
    int index = 0, len = encoded.length(); 
    int lat = 0, lng = 0; 
    while (index < len) { 
     int b, shift = 0, result = 0; 
     do { 
      b = encoded.charAt(index++) - 63; 
      result |= (b & 0x1f) << shift; 
      shift += 5; 
     } while (b >= 0x20); 
     int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1)); 
     lat += dlat; 
     shift = 0; 
     result = 0; 
     do { 
      b = encoded.charAt(index++) - 63; 
      result |= (b & 0x1f) << shift; 
      shift += 5; 
     } while (b >= 0x20); 
     int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1)); 
     lng += dlng; 

     LatLng position = new LatLng((double) lat/1E5, (double) lng/1E5); 
     poly.add(position); 
    } 
    return poly; 
} 
} 

2.Next, Créer un AsyncTask pour obtenir la direction:

package com.emildesign.sgtaskmanager.asynctasks; 

    import java.util.ArrayList; 
    import java.util.Map; 

    import org.w3c.dom.Document; 

    import com.emildesign.sgtaskmanager.R; 
    import com.emildesign.sgtaskmanager.activities.LoginScrActivity; 
    import com.emildesign.sgtaskmanager.activities.MapFragmentActivity; 
    import com.emildesign.sgtaskmanager.objects.DataAccessManager; 
    import com.emildesign.sgtaskmanager.objects.DialogUtils; 
    import com.emildesign.sgtaskmanager.objects.GMapV2Direction; 
    import com.google.android.gms.maps.model.LatLng; 


    import android.app.Dialog; 
    import android.os.AsyncTask; 
    import android.widget.Toast; 

    public class GetDirectionsAsyncTask extends AsyncTask<Map<String, String>, Object, ArrayList<LatLng>> { 

public static final String USER_CURRENT_LAT = "user_current_lat"; 
public static final String USER_CURRENT_LONG = "user_current_long"; 
public static final String DESTINATION_LAT = "destination_lat"; 
public static final String DESTINATION_LONG = "destination_long"; 
public static final String DIRECTIONS_MODE = "directions_mode"; 
private MapFragmentActivity activity; 
private String url; 

private Exception exception; 

private Dialog progressDialog; 

public GetDirectionsAsyncTask(MapFragmentActivity activity /*String url*/) 
{ 
    super(); 
    this.activity = activity; 

    // this.url = url; 
} 

public void onPreExecute() { 
    progressDialog = DialogUtils.createProgressDialog(activity, activity.getString(R.string.get_data_dialog_message)); 
    progressDialog.show(); 
} 

@Override 
public void onPostExecute(ArrayList<LatLng> result) { 
    progressDialog.dismiss(); 

    if (exception == null) { 
     activity.handleGetDirectionsResult(result); 
    } else { 
     processException(); 
    } 
} 

@Override 
protected ArrayList<LatLng> doInBackground(Map<String, String>... params) { 

    Map<String, String> paramMap = params[0]; 
    try{ 
     LatLng fromPosition = new LatLng(Double.valueOf(paramMap.get(USER_CURRENT_LAT)) , Double.valueOf(paramMap.get(USER_CURRENT_LONG))); 
     LatLng toPosition = new LatLng(Double.valueOf(paramMap.get(DESTINATION_LAT)) , Double.valueOf(paramMap.get(DESTINATION_LONG))); 
     GMapV2Direction md = new GMapV2Direction(); 
     Document doc = md.getDocument(fromPosition, toPosition, paramMap.get(DIRECTIONS_MODE)); 
     ArrayList<LatLng> directionPoints = md.getDirection(doc); 
     return directionPoints; 

    } 
    catch (Exception e) { 
     exception = e; 
     return null; 
    } 
} 

private void processException() { 
    Toast.makeText(activity, activity.getString(R.string.error_when_retrieving_data), 3000).show(); 
} 

} 

3.Créez ces deux méthodes dans votre activité de la carte pour obtenir la direction et la manipulation Résultat:

public void handleGetDirectionsResult(ArrayList<LatLng> directionPoints) 
{ 
    Polyline newPolyline; 
    GoogleMap mMap = ((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map)).getMap(); 
    PolylineOptions rectLine = new PolylineOptions().width(3).color(Color.RED); 

    for(int i = 0 ; i < directionPoints.size() ; i++) 
    {   
     rectLine.add(directionPoints.get(i)); 
    } 
    newPolyline = mMap.addPolyline(rectLine); 
} 


public void findDirections(double fromPositionDoubleLat, double fromPositionDoubleLong, double toPositionDoubleLat, double toPositionDoubleLong, String mode) 
{ 
    Map<String, String> map = new HashMap<String, String>(); 
    map.put(GetDirectionsAsyncTask.USER_CURRENT_LAT, String.valueOf(fromPositionDoubleLat)); 
    map.put(GetDirectionsAsyncTask.USER_CURRENT_LONG, String.valueOf(fromPositionDoubleLong)); 
    map.put(GetDirectionsAsyncTask.DESTINATION_LAT, String.valueOf(toPositionDoubleLat)); 
    map.put(GetDirectionsAsyncTask.DESTINATION_LONG, String.valueOf(toPositionDoubleLong)); 
    map.put(GetDirectionsAsyncTask.DIRECTIONS_MODE, mode); 

    GetDirectionsAsyncTask asyncTask = new GetDirectionsAsyncTask(this); 
    asyncTask.execute(map); 
} 

et enfin, exécutez la trouver la méthode de direction:

findDirections(SGTasksListAppObj.getInstance().currentUserLocation.getLatitude(), 
               SGTasksListAppObj.getInstance().currentUserLocation.getLongitude(), 
               clickMarkerLatLng.latitude, clickMarkerLatLng.longitude, GMapV2Direction.MODE_DRIVING);