Android Полилиния не правильно рисует маршрут

Question

После прочтения ответа @Akexorcist на Get driving directions using Google Maps API v2, я внедрил свое решение, чтобы нарисовать маршрут, возвращенный из вызова maps.googleapis.com с помощью полилинии. Однако, даже если он компилируется и не разбивается, полилиния не появляется.

Мой главный класс:

package com.example.robertloggia.test1; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Path; 
import android.location.Criteria; 
import android.os.Bundle; 
import android.widget.Toast; 
import com.google.android.gms.common.api.GoogleApiClient; 
import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.MapFragment; 
import com.google.android.gms.maps.MapView; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.CameraPosition; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.Marker; 
import com.google.android.gms.maps.model.MarkerOptions; 
import android.support.v4.app.FragmentActivity; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks; 
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener; 
import com.google.android.gms.maps.model.PolylineOptions; 
import com.google.android.gms.maps.model.Polyline; 
import android.support.v4.app.FragmentActivity; 

import org.w3c.dom.Document; 

import java.util.ArrayList; 

/** 
* Created by RobertLoggia on 5/28/15. 
*/ 



public class BusTrackingActivity extends Activity{ 



    private LocationManager mLocationManager = null; 
    private GoogleApiClient mGoogleApiClient; 

    // Constant for defining latitude and longitude 
    static final LatLng DerekPos = new LatLng(40 , -79); 

    // GoogleMap class 
    private GoogleMap googleMap; 

    String routeNumber; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_bustracking); 

     //Get information from main activity 
     Bundle extras = getIntent().getExtras(); 
     if (extras != null) { 
      routeNumber = extras.getString("routeNumber"); 
     } 
     Toast.makeText(BusTrackingActivity.this, routeNumber, Toast.LENGTH_SHORT).show(); 

     try { 
      if (googleMap == null) { 
       googleMap = ((MapFragment) getFragmentManager(). 
         findFragmentById(R.id.map)).getMap(); 
      } 


      //Maps Settings 
      googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); 
      googleMap.setMyLocationEnabled(true);// Place dot on current location 
      googleMap.setTrafficEnabled(false);// Turns traffic layer on 
      googleMap.setIndoorEnabled(true);// Enables indoor maps 
      googleMap.setBuildingsEnabled(true);// Turns on 3D buildings 
      googleMap.getUiSettings().setZoomControlsEnabled(true);// Show Zoom buttons 


      // Create a marker in the map at a given position with a title 
      Marker marker = googleMap.addMarker(new MarkerOptions(). 
        position(DerekPos).title("Hello")); 


      //Location myLocation = googleMap.getMyLocation(); 


      //Zoom into map at current location 
      LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
      Criteria criteria = new Criteria(); 

      Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false)); 
      if (location != null) { 
       googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(
         new LatLng(location.getLatitude(), location.getLongitude()), 13)); 

       CameraPosition cameraPosition = new CameraPosition.Builder() 
         .target(new LatLng(location.getLatitude(), location.getLongitude()))  // Sets the center of the map to location user 
         .zoom(16)     // Sets the zoom 
         .bearing(90)    // Sets the orientation of the camera to east 
         .tilt(40)     // Sets the tilt of the camera to 30 degrees 
         .build();     // Creates a CameraPosition from the builder 
       googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition)); 




//    Polyline line = googleMap.addPolyline(new PolylineOptions() 
//      .add(new LatLng(location.getLatitude(), location.getLongitude()), new LatLng(41.829548, -71.387993)) 
//      .width(5) 
//      .color(Color.RED)); 



       LatLng fromPosition = new LatLng(41.82861033, -71.38920772); 
       LatLng toPosition = new LatLng(41.828777, -71.388499); 


       Test md = new Test(); 
       Document doc = md.getDocument(fromPosition, toPosition, Test.MODE_WALKING); 
       ArrayList<LatLng> directionPoint = md.getDirection(doc); 
       PolylineOptions rectLine = new PolylineOptions().width(3).color(Color.RED); 

       for(int i = 0 ; i < directionPoint.size() ; i++) { 
        rectLine.add(directionPoint.get(i)); 
       } 
       googleMap.addPolyline(rectLine); 

      } 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

    } 
} 

класс Test

package com.example.robertloggia.test1; 

/** 
* Created by RobertLoggia on 5/29/15. 
*/ 

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

    public Test() { } 

    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="+mode; 

     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(nl1.getLength() - 1); 
     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(nl1.getLength() - 1); 
     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(nl1.getLength() - 1); 
     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(nl1.getLength() - 1); 
     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; 
    } 

} 

Мои activity_bustracking.xml (Карта показывает вверх совершенно нормально и делают, как надо, это просто, что ломаная не показ)

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    xmlns:map="http://schemas.android.com/apk/res-auto" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <fragment 
     android:id="@+id/map" 
     android:name="com.google.android.gms.maps.MapFragment" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent"/> 
</LinearLayout> 

Что необходимо изменить или добавить для того, чтобы сделать появляется полилиния?

Answer 1

я, наконец, выяснить, решение и код следующим образом:

Обратите внимание, что вам нужно импортировать библиотеку, включая 4-х файлов: BitmapRequest.java, GoogleDirection.java, GooglePlaceSearch.java и PlaceType.java от here.

BusTrakingActivity.java

public class BusTrackingActivity extends FragmentActivity { 
    LatLng start = new LatLng(41.82861033, -71.38920772); 
    LatLng end = new LatLng(41.828777, -71.388499); 

    GoogleMap mMap; 
    GoogleDirection gd; 
    Document mDoc; 

    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_bustracking); 

     mMap = ((SupportMapFragment) getSupportFragmentManager() 
       .findFragmentById(R.id.map)).getMap(); 

     mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(start, 15)); 

     gd = new GoogleDirection(this); 
     gd.setOnDirectionResponseListener(new GoogleDirection.OnDirectionResponseListener() { 
      public void onResponse(String status, Document doc, GoogleDirection gd) { 
       mDoc = doc; 
       mMap.addPolyline(gd.getPolyline(doc, 3, Color.RED)); 
       mMap.addMarker(new MarkerOptions().position(start) 
         .icon(BitmapDescriptorFactory.defaultMarker(
           BitmapDescriptorFactory.HUE_GREEN))); 

       mMap.addMarker(new MarkerOptions().position(end) 
         .icon(BitmapDescriptorFactory.defaultMarker(
           BitmapDescriptorFactory.HUE_GREEN))); 

      } 
     }); 

     gd.setLogging(true); 
     gd.request(start, end, GoogleDirection.MODE_DRIVING); 
    } 



    public void onPause() { 
     super.onPause(); 
     gd.cancelAnimated(); 
    } 
} 

и activity_bustracking.xml с ним:

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
       android:orientation="vertical" android:layout_width="match_parent" 
       android:layout_height="match_parent"> 

    <fragment 
     android:id="@+id/map" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:name="com.google.android.gms.maps.SupportMapFragment" /> 

</LinearLayout>