Googleマップの2か所の間で経路指定の方法を描くにはどうすればよいですか？

Question

Googleマップでルーティングの方向を描く方法を検索しました。私はいくつかのリンクを見つけました。しかし、そのコードでは、2つの場所の間にパスを描画しません。誰も私が2つのペースの間のパスを描くのを助けることができますか？ 私はAndroidのスタジオ2.1を使用していますし、github .ThisのSDKのバージョンをコンパイル24

activity_maps.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context=".MapsActivity"> 

    <fragment xmlns:android="http://schemas.android.com/apk/res/android" 
     xmlns:map="http://schemas.android.com/apk/res-auto" 
     xmlns:tools="http://schemas.android.com/tools" 
     android:id="@+id/map" 
     android:name="com.google.android.gms.maps.SupportMapFragment" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     tools:context="com.example.shyamali.maptest.MapsActivity"/> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:gravity="bottom" 
     android:orientation="vertical"> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:background="#cc3b60a7" 
      android:orientation="horizontal"> 

      <Button 
       android:id="@+id/buttonSetFrom" 
       android:text="Set From" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" /> 

      <Button 
       android:id="@+id/buttonSetTo" 
       android:text="Set To" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" /> 


      <Button 
       android:id="@+id/buttonCalcDistance" 
       android:text="Calc Distance" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" /> 


     </LinearLayout> 
    </LinearLayout> 
</FrameLayout> 

MapsActivity.java

package com.example.shyamali.maptest; 


import android.Manifest; 
import android.app.ProgressDialog; 
import android.content.pm.PackageManager; 
import android.graphics.Color; 
import android.location.Location; 
import android.net.Uri; 
import android.support.v4.app.ActivityCompat; 
import android.support.v4.app.FragmentActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.Toast; 

import com.android.volley.RequestQueue; 
import com.android.volley.Response; 
import com.android.volley.VolleyError; 
import com.android.volley.toolbox.StringRequest; 
import com.android.volley.toolbox.Volley; 
import com.google.android.gms.appindexing.Action; 
import com.google.android.gms.appindexing.AppIndex; 
import com.google.android.gms.common.ConnectionResult; 
import com.google.android.gms.common.api.GoogleApiClient; 
import com.google.android.gms.location.LocationServices; 
import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.OnMapReadyCallback; 
import com.google.android.gms.maps.SupportMapFragment; 
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 com.google.android.gms.maps.model.Polyline; 
import com.google.android.gms.maps.model.PolylineOptions; 
import com.google.maps.android.SphericalUtil; 

import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import java.util.ArrayList; 
import java.util.List; 

public class MapsActivity extends FragmentActivity implements 
     OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks,GoogleApiClient.OnConnectionFailedListener,GoogleMap.OnMarkerDragListener,GoogleMap.OnMapLongClickListener,View.OnClickListener { 

    //Our Map 
    private GoogleMap mMap; 

    //To store longitude and latitude from map 
    private double longitude; 
    private double latitude; 

    //From -> the first coordinate from where we need to calculate the distance 
    private double fromLongitude; 
    private double fromLatitude; 

    //To -> the second coordinate to where we need to calculate the distance 
    private double toLongitude; 
    private double toLatitude; 

    //Google ApiClient 
    private GoogleApiClient googleApiClient; 

    //Our buttons 
    private Button buttonSetTo; 
    private Button buttonSetFrom; 
    private Button buttonCalcDistance; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_maps); 
     // Obtain the SupportMapFragment and get notified when the map is ready to be used. 
     SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() 
       .findFragmentById(R.id.map); 
     mapFragment.getMapAsync(this); 

     //Initializing googleapi client 
     // ATTENTION: This "addApi(AppIndex.API)"was auto-generated to implement the App Indexing API. 
     // See https://g.co/AppIndexing/AndroidStudio for more information. 
     googleApiClient = new GoogleApiClient.Builder(this) 
       .addConnectionCallbacks(this) 
       .addOnConnectionFailedListener(this) 
       .addApi(LocationServices.API) 
       .addApi(AppIndex.API).build(); 

     buttonSetTo = (Button) findViewById(R.id.buttonSetTo); 
     buttonSetFrom = (Button) findViewById(R.id.buttonSetFrom); 
     buttonCalcDistance = (Button) findViewById(R.id.buttonCalcDistance); 

     buttonSetTo.setOnClickListener(this); 
     buttonSetFrom.setOnClickListener(this); 
     buttonCalcDistance.setOnClickListener(this); 
    } 

    @Override 
    protected void onStart() { 
     googleApiClient.connect(); 
     super.onStart(); 
     // ATTENTION: This was auto-generated to implement the App Indexing API. 
     // See https://g.co/AppIndexing/AndroidStudio for more information. 
     Action viewAction = Action.newAction(
       Action.TYPE_VIEW, // TODO: choose an action type. 
       "Maps Page", // TODO: Define a title for the content shown. 
       // TODO: If you have web page content that matches this app activity's content, 
       // make sure this auto-generated web page URL is correct. 
       // Otherwise, set the URL to null. 
       Uri.parse("http://host/path") 
     ); 
     AppIndex.AppIndexApi.start(googleApiClient, viewAction); 
    } 

    @Override 
    protected void onStop() { 
     googleApiClient.disconnect(); 
     super.onStop(); 
     // ATTENTION: This was auto-generated to implement the App Indexing API. 
     // See https://g.co/AppIndexing/AndroidStudio for more information. 
     Action viewAction = Action.newAction(
       Action.TYPE_VIEW, // TODO: choose an action type. 
       "Maps Page", // TODO: Define a title for the content shown. 
       // TODO: If you have web page content that matches this app activity's content, 
       // make sure this auto-generated web page URL is correct. 
       // Otherwise, set the URL to null. 
       Uri.parse("http://host/path") 
     ); 
     AppIndex.AppIndexApi.end(googleApiClient, viewAction); 
    } 

    //Getting current location 
    private void getCurrentLocation() { 
     mMap.clear(); 
     //Creating a location object 
     if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
      // TODO: Consider calling 
      // ActivityCompat#requestPermissions 
      // here to request the missing permissions, and then overriding 
      // public void onRequestPermissionsResult(int requestCode, String[] permissions, 
      //           int[] grantResults) 
      // to handle the case where the user grants the permission. See the documentation 
      // for ActivityCompat#requestPermissions for more details. 
      return; 
     } 
     Location location = LocationServices.FusedLocationApi.getLastLocation(googleApiClient); 
     if (location != null) { 
      //Getting longitude and latitude 
      longitude = location.getLongitude(); 
      latitude = location.getLatitude(); 

      //moving the map to location 
      moveMap(); 
     } 
    } 

    //Function to move the map 
    private void moveMap() { 
     //Creating a LatLng Object to store Coordinates 
     LatLng latLng = new LatLng(latitude, longitude); 

     //Adding marker to map 
     mMap.addMarker(new MarkerOptions() 
       .position(latLng) //setting position 
       .draggable(true) //Making the marker draggable 
       .title("Current Location")); //Adding a title 

     //Moving the camera 
     mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 

     //Animating the camera 
     mMap.animateCamera(CameraUpdateFactory.zoomTo(15)); 
    } 

    public String makeURL (double sourcelat, double sourcelog, double destlat, double destlog){ 
     StringBuilder urlString = new StringBuilder(); 
     urlString.append("https://maps.googleapis.com/maps/api/directions/json"); 
     urlString.append("?origin=");// from 
     urlString.append(Double.toString(sourcelat)); 
     urlString.append(","); 
     urlString 
       .append(Double.toString(sourcelog)); 
     urlString.append("&destination=");// to 
     urlString 
       .append(Double.toString(destlat)); 
     urlString.append(","); 
     urlString.append(Double.toString(destlog)); 
     urlString.append("&sensor=false&mode=driving&alternatives=true"); 
     urlString.append("&key=AIzaSyCJVpM7-ayGMraxFRzq4U8Dt1uRNsmiaws"); 
     return urlString.toString(); 
    } 

    private void getDirection(){ 
     //Getting the URL 
     String url = makeURL(fromLatitude, fromLongitude, toLatitude, toLongitude); 

     //Showing a dialog till we get the route 
     final ProgressDialog loading = ProgressDialog.show(this, "Getting Route", "Please wait...", false, false); 

     //Creating a string request 
     StringRequest stringRequest = new StringRequest(url, 
       new Response.Listener<String>() { 
        @Override 
        public void onResponse(String response) { 
         loading.dismiss(); 
         //Calling the method drawPath to draw the path 
         drawPath(response); 
        } 
       }, 
       new Response.ErrorListener() { 
        @Override 
        public void onErrorResponse(VolleyError error) { 
         loading.dismiss(); 
        } 
       }); 

     //Adding the request to request queue 
     RequestQueue requestQueue = Volley.newRequestQueue(this); 
     requestQueue.add(stringRequest); 
    } 

    //The parameter is the server response 
    public void drawPath(String result) { 
     //Getting both the coordinates 
     LatLng from = new LatLng(fromLatitude,fromLongitude); 
     LatLng to = new LatLng(toLatitude,toLongitude); 

     //Calculating the distance in meters 
     Double distance = SphericalUtil.computeDistanceBetween(from, to); 

     //Displaying the distance 
     Toast.makeText(this,String.valueOf(distance+" Meters"),Toast.LENGTH_SHORT).show(); 


     try { 
      //Parsing json 
      final JSONObject json = new JSONObject(result); 
      JSONArray routeArray = json.getJSONArray("routes"); 
      JSONObject routes = routeArray.getJSONObject(0); 
      JSONObject overviewPolylines = routes.getJSONObject("overview_polyline"); 
      String encodedString = overviewPolylines.getString("points"); 
      List<LatLng> list = decodePoly(encodedString); 
      Polyline line = mMap.addPolyline(new PolylineOptions() 
        .addAll(list) 
        .width(20) 
        .color(Color.RED) 
        .geodesic(true) 
      ); 


     } 
     catch (JSONException e) { 

     } 
    } 

    private List<LatLng> decodePoly(String encoded) { 
     List<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 p = new LatLng((((double) lat/1E5)), 
        (((double) lng/1E5))); 
      poly.add(p); 
     } 

     return poly; 
    } 

    @Override 
    public void onMapReady(GoogleMap googleMap) { 
     mMap = googleMap; 
     LatLng latLng = new LatLng(-34, 151); 
     mMap.addMarker(new MarkerOptions().position(latLng).draggable(true)); 
     mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 
     mMap.setOnMarkerDragListener(this); 
     mMap.setOnMapLongClickListener(this); 
    } 

    @Override 
    public void onConnected(Bundle bundle) { 
     getCurrentLocation(); 
    } 

    @Override 
    public void onConnectionSuspended(int i) { 

    } 

    @Override 
    public void onConnectionFailed(ConnectionResult connectionResult) { 

    } 

    @Override 
    public void onMapLongClick(LatLng latLng) { 
     //Clearing all the markers 
     mMap.clear(); 
     //Adding a new marker to the current pressed position 
     mMap.addMarker(new MarkerOptions() 
       .position(latLng) 
       .draggable(true)); 

     latitude = latLng.latitude; 
     longitude = latLng.longitude; 
    } 

    @Override 
    public void onMarkerDragStart(Marker marker) { 

    } 

    @Override 
    public void onMarkerDrag(Marker marker) { 

    } 

    @Override 
    public void onMarkerDragEnd(Marker marker) { 
     //Getting the coordinates 
     latitude = marker.getPosition().latitude; 
     longitude = marker.getPosition().longitude; 

     //Moving the map 
     moveMap(); 
    } 

    @Override 
    public void onClick(View v) { 
     if(v == buttonSetFrom){ 
      fromLatitude = latitude; 
      fromLongitude = longitude; 
      Toast.makeText(this,"From set",Toast.LENGTH_SHORT).show(); 
     } 

     if(v == buttonSetTo){ 
      toLatitude = latitude; 
      toLongitude = longitude; 
      Toast.makeText(this,"To set",Toast.LENGTH_SHORT).show(); 
     } 

     if(v == buttonCalcDistance){ 
      getDirection(); 
     } 
    } 
} 

Answer 1

チェックこの例では、上の2つの場所間のルートがベース見つけますGoogleマップのアドレステキスト

パッケージcom.itshareplus.googlemapdemo;

import android.Manifest; 
import android.app.ProgressDialog; 
import android.content.pm.PackageManager; 
import android.graphics.Color; 
import android.support.v4.app.ActivityCompat; 
import android.support.v4.app.FragmentActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.OnMapReadyCallback; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
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 com.google.android.gms.maps.model.Polyline; 
import com.google.android.gms.maps.model.PolylineOptions; 

import java.io.UnsupportedEncodingException; 
import java.util.ArrayList; 
import java.util.List; 

import Modules.DirectionFinder; 
import Modules.DirectionFinderListener; 
import Modules.Route; 

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, DirectionFinderListener { 

    private GoogleMap mMap; 
    private Button btnFindPath; 
    private EditText etOrigin; 
    private EditText etDestination; 
    private List<Marker> originMarkers = new ArrayList<>(); 
    private List<Marker> destinationMarkers = new ArrayList<>(); 
    private List<Polyline> polylinePaths = new ArrayList<>(); 
    private ProgressDialog progressDialog; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_maps); 
     // Obtain the SupportMapFragment and get notified when the map is ready to be used. 
     SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() 
       .findFragmentById(R.id.map); 
     mapFragment.getMapAsync(this); 

     btnFindPath = (Button) findViewById(R.id.btnFindPath); 
     etOrigin = (EditText) findViewById(R.id.etOrigin); 
     etDestination = (EditText) findViewById(R.id.etDestination); 

     btnFindPath.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       sendRequest(); 
      } 
     }); 
    } 

    private void sendRequest() { 
     String origin = etOrigin.getText().toString(); 
     String destination = etDestination.getText().toString(); 
     if (origin.isEmpty()) { 
      Toast.makeText(this, "Please enter origin address!", Toast.LENGTH_SHORT).show(); 
      return; 
     } 
     if (destination.isEmpty()) { 
      Toast.makeText(this, "Please enter destination address!", Toast.LENGTH_SHORT).show(); 
      return; 
     } 

     try { 
      new DirectionFinder(this, origin, destination).execute(); 
     } catch (UnsupportedEncodingException e) { 
      e.printStackTrace(); 
     } 
    } 

    @Override 
    public void onMapReady(GoogleMap googleMap) { 
     mMap = googleMap; 
     LatLng hcmus = new LatLng(10.762963, 106.682394); 
     mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(hcmus, 18)); 
     originMarkers.add(mMap.addMarker(new MarkerOptions() 
       .title("Đại học Khoa học tự nhiên") 
       .position(hcmus))); 

     if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
      // TODO: Consider calling 
      // ActivityCompat#requestPermissions 
      // here to request the missing permissions, and then overriding 
      // public void onRequestPermissionsResult(int requestCode, String[] permissions, 
      //           int[] grantResults) 
      // to handle the case where the user grants the permission. See the documentation 
      // for ActivityCompat#requestPermissions for more details. 
      return; 
     } 
     mMap.setMyLocationEnabled(true); 
    } 


    @Override 
    public void onDirectionFinderStart() { 
     progressDialog = ProgressDialog.show(this, "Please wait.", 
       "Finding direction..!", true); 

     if (originMarkers != null) { 
      for (Marker marker : originMarkers) { 
       marker.remove(); 
      } 
     } 

     if (destinationMarkers != null) { 
      for (Marker marker : destinationMarkers) { 
       marker.remove(); 
      } 
     } 

     if (polylinePaths != null) { 
      for (Polyline polyline:polylinePaths) { 
       polyline.remove(); 
      } 
     } 
    } 

    @Override 
    public void onDirectionFinderSuccess(List<Route> routes) { 
     progressDialog.dismiss(); 
     polylinePaths = new ArrayList<>(); 
     originMarkers = new ArrayList<>(); 
     destinationMarkers = new ArrayList<>(); 

     for (Route route : routes) { 
      mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(route.startLocation, 16)); 
      ((TextView) findViewById(R.id.tvDuration)).setText(route.duration.text); 
      ((TextView) findViewById(R.id.tvDistance)).setText(route.distance.text); 

      originMarkers.add(mMap.addMarker(new MarkerOptions() 
        .icon(BitmapDescriptorFactory.fromResource(R.drawable.start_blue)) 
        .title(route.startAddress) 
        .position(route.startLocation))); 
      destinationMarkers.add(mMap.addMarker(new MarkerOptions() 
        .icon(BitmapDescriptorFactory.fromResource(R.drawable.end_green)) 
        .title(route.endAddress) 
        .position(route.endLocation))); 

      PolylineOptions polylineOptions = new PolylineOptions(). 
        geodesic(true). 
        color(Color.BLUE). 
        width(10); 

      for (int i = 0; i < route.points.size(); i++) 
       polylineOptions.add(route.points.get(i)); 

      polylinePaths.add(mMap.addPolyline(polylineOptions)); 
     } 
    } 
}