2つの場所の間の運転距離と移動時間

Question

私はアンドロイドmapV2に2つの緯度/経度点を与えることによって、距離が&の移動時間 を2つの場所の間で見つける必要がある。 例を次のように使用していますDriving distance and travel time duration between two locations in Google Map Android API V2

このコードでは多すぎるエラーとタイプミスが発生しています。この問題を解決するのを手伝ってください。

私はAndroidのキーを使用してGoogleの場所apiとdirection apiで動作するかどうかを確認しますか？

マニフェスト：

<?xml version="1.0" encoding="utf-8"?> 
    <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package=""> 

     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 
     <uses-permission android:name="com.google.providers.gsf.permission.READ_GSERVICES"/> 
     <uses-permission android:name="android.permission.INTERNET"/> 

     <uses-feature 
      android:glEsVersion="0x00020000" 
      android:required="true" /> 

     <application 
      android:allowBackup="true" 
      android:icon="@mipmap/ic_launcher" 
      android:label="@string/app_name" 
      android:supportsRtl="true" 
      android:theme="@style/AppTheme" > 
      <meta-data 
       android:name="com.google.android.geo.API_KEY" 
       android:value="@string/google_maps_key" /> 

      <activity 
       android:name=".MainActivity" 
       android:label="@string/title_activity_maps" > 
       <intent-filter> 
        <action android:name="android.intent.action.MAIN" /> 

        <category android:name="android.intent.category.LAUNCHER" /> 
       </intent-filter> 
      </activity> 
     </application> 

    </manifest> 

メインActvity：

public class MainActivity extends FragmentActivity { 

     GoogleMap map; 
     ArrayList<LatLng> markerPoints; 
     TextView tvDistanceDuration; 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 

      tvDistanceDuration = (TextView) findViewById(R.id.tv_distance_time); 

      // Initializing 
      markerPoints = new ArrayList<LatLng>(); 

      // Getting reference to SupportMapFragment of the activity_main 
      SupportMapFragment fm = (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map); 

      // Getting Map for the SupportMapFragment 
      map = fm.getMap(); 

      // Enable MyLocation Button in the Map 
      map.setMyLocationEnabled(true); 

      // Setting onclick event listener for the map 
      map.setOnMapClickListener(new OnMapClickListener() { 

       @Override 
       public void onMapClick(LatLng point) { 

        // Already two locations 
        if(markerPoints.size()>1){ 
         markerPoints.clear(); 
         map.clear(); 
        } 

        // Adding new item to the ArrayList 
        markerPoints.add(point); 

        // Creating MarkerOptions 
        MarkerOptions options = new MarkerOptions(); 

        // Setting the position of the marker 
        options.position(point); 

        /** 
        * For the start location, the color of marker is GREEN and 
        * for the end location, the color of marker is RED. 
        */ 
        if(markerPoints.size()==1){ 
         options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)); 
        }else if(markerPoints.size()==2){ 
         options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)); 
        } 


        // Add new marker to the Google Map Android API V2 
        map.addMarker(options); 

        // Checks, whether start and end locations are captured 
        if(markerPoints.size() >= 2){ 
         LatLng origin = markerPoints.get(0); 
         LatLng dest = markerPoints.get(1); 

         // Getting URL to the Google Directions API 
         String url = getDirectionsUrl(origin, dest); 

         DownloadTask downloadTask = new DownloadTask(); 

         // Start downloading json data from Google Directions API 
         downloadTask.execute(url); 
        } 

       } 
      }); 

     } 

     private String getDirectionsUrl(LatLng origin,LatLng dest){ 

      // Origin of route 
      String str_origin = "origin="+origin.latitude+","+origin.longitude; 

      // Destination of route 
      String str_dest = "destination="+dest.latitude+","+dest.longitude; 


      // Sensor enabled 
      String sensor = "sensor=false"; 

      // Building the parameters to the web service 
      String parameters = str_origin+"&"+str_dest+"&"+sensor; 

      // Output format 
      String output = "json"; 

      // Building the url to the web service 
      String url = "https://maps.googleapis.com/maps/api/directions/"+output+"?"+parameters; 


      return url; 
     } 

     /** A method to download json data from url */ 
     private String downloadUrl(String strUrl) throws IOException{ 
      String data = ""; 
      InputStream iStream = null; 
      HttpURLConnection urlConnection = null; 
      try{ 
       URL url = new URL(strUrl); 

       // Creating an http connection to communicate with url 
       urlConnection = (HttpURLConnection) url.openConnection(); 

       // Connecting to url 
       urlConnection.connect(); 

       // Reading data from url 
       iStream = urlConnection.getInputStream(); 

       BufferedReader br = new BufferedReader(new InputStreamReader(iStream)); 

       StringBuffer sb = new StringBuffer(); 

       String line = ""; 
       while((line = br.readLine()) != null){ 
        sb.append(line); 
       } 

       data = sb.toString(); 

       br.close(); 

      }catch(Exception e){ 
       Log.d("Exception while downloading url", e.toString()); 
      }finally{ 
       iStream.close(); 
       urlConnection.disconnect(); 
      } 
      return data; 
     } 



     // Fetches data from url passed 
     private class DownloadTask extends AsyncTask<String, Void, String>{ 

      // Downloading data in non-ui thread 
      @Override 
      protected String doInBackground(String... url) { 

       // For storing data from web service 
       String data = ""; 

       try{ 
        // Fetching the data from web service 
        data = downloadUrl(url[0]); 
       }catch(Exception e){ 
        Log.d("Background Task",e.toString()); 
       } 
       return data; 
      } 

      // Executes in UI thread, after the execution of 
      // doInBackground() 
      @Override 
      protected void onPostExecute(String result) { 
       super.onPostExecute(result); 

       ParserTask parserTask = new ParserTask(); 

       // Invokes the thread for parsing the JSON data 
       parserTask.execute(result); 

      } 
     } 


     private class ParserTask extends AsyncTask<String, Integer, List<List<HashMap<String,String>>> >{ 

      // Parsing the data in non-ui thread 
      @Override 
      protected List<List<HashMap<String, String>>> doInBackground(String... jsonData) { 

       JSONObject jObject; 
       List<List<HashMap<String, String>>> routes = null; 

       try{ 
        jObject = new JSONObject(jsonData[0]); 
        DirectionsJSONParser parser = new DirectionsJSONParser(); 

        // Starts parsing data 
        routes = parser.parse(jObject); 
       }catch(Exception e){ 
        e.printStackTrace(); 
       } 
       return routes; 
      } 

      // Executes in UI thread, after the parsing process 
      @Override 
      protected void onPostExecute(List<List<HashMap<String, String>>> result) { 
       ArrayList<LatLng> points = null; 
       PolylineOptions lineOptions = null; 
       MarkerOptions markerOptions = new MarkerOptions(); 
       String distance = ""; 
       String duration = ""; 



       if(result.size()<1){ 
        Toast.makeText(getBaseContext(), "No Points", Toast.LENGTH_SHORT).show(); 
        return; 
       } 


       // Traversing through all the routes 
       for(int i=0;i<result.size();i++){ 
        points = new ArrayList<LatLng>(); 
        lineOptions = new PolylineOptions(); 

        // Fetching i-th route 
        List<HashMap<String, String>> path = result.get(i); 

        // Fetching all the points in i-th route 
        for(int j=0;j<path.size();j++){ 
         HashMap<String,String> point = path.get(j); 

         if(j==0){ // Get distance from the list 
          distance = (String)point.get("distance"); 
          continue; 
         }else if(j==1){ // Get duration from the list 
          duration = (String)point.get("duration"); 
          continue; 
         } 

         double lat = Double.parseDouble(point.get("lat")); 
         double lng = Double.parseDouble(point.get("lng")); 
         LatLng position = new LatLng(lat, lng); 

         points.add(position); 
        } 

        // Adding all the points in the route to LineOptions 
        lineOptions.addAll(points); 
        lineOptions.width(2); 
        lineOptions.color(Color.RED); 

       } 

       tvDistanceDuration.setText("Distance:"+distance + ", Duration:"+duration); 

       // Drawing polyline in the Google Map for the i-th route 
       map.addPolyline(lineOptions); 
      } 
     } 


     @Override 
     public boolean onCreateOptionsMenu(Menu menu) { 
      // Inflate the menu; this adds items to the action bar if it is present. 
      getMenuInflater().inflate(R.menu.main, menu); 
      return true; 
     } 
    } 


    **Directionjasonparser.java:** 


    public class DirectionsJSONParser { 

     public List<List<HashMap<String,String>>> parse(JSONObject jObject){ 

      List<List<HashMap<String, String>>> routes = new ArrayList<List<HashMap<String,String>>>() ; 
      JSONArray jRoutes = null; 
      JSONArray jLegs = null; 
      JSONArray jSteps = null; 
      JSONObject jDistance = null; 
      JSONObject jDuration = null; 

      try { 

       jRoutes = jObject.getJSONArray("routes"); 

       /** Traversing all routes */ 
       for(int i=0;i<jRoutes.length();i++){ 
        jLegs = ((JSONObject)jRoutes.get(i)).getJSONArray("legs"); 

        List<HashMap<String, String>> path = new     ArrayList<HashMap<String, String>>(); 

        /** Traversing all legs */ 
        for(int j=0;j<jLegs.length();j++){ 

         /** Getting distance from the json data */ 
         jDistance = ((JSONObject) jLegs.get(j)).getJSONObject("distance"); 
         HashMap<String, String> hmDistance = new HashMap<String, String>(); 
         hmDistance.put("distance", jDistance.getString("text")); 

         /** Getting duration from the json data */ 
         jDuration = ((JSONObject) jLegs.get(j)).getJSONObject("duration"); 
         HashMap<String, String> hmDuration = new HashMap<String, String>(); 
         hmDuration.put("duration", jDuration.getString("text")); 

         /** Adding distance object to the path */ 
         path.add(hmDistance); 

         /** Adding duration object to the path */ 
         path.add(hmDuration); 


         jSteps = ((JSONObject)jLegs.get(j)).getJSONArray("steps"); 


         for(int k=0;k<jSteps.length();k++){ 
          String polyline = ""; 


         polyline = (String)((JSONObject)((JSONObject)jSteps.get(k)).get("polyline")).get("points"); 


     List<LatLng> list = decodePoly(polyline); 

          /** Traversing all points */ 
          for(int l=0;l<list.size();l++){ 
           HashMap<String, String> hm = new HashMap<String, String>(); 
           hm.put("lat", Double.toString(((LatLng)list.get(l)).latitude)); 
           hm.put("lng", Double.toString(((LatLng)list.get(l)).longitude)); 
           path.add(hm); 
          } 
         } 
        } 
        routes.add(path); 
       } 

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

      return routes; 
     } 

     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; 
     } 
    } 

Activity_main.xml：

<RelativeLayout 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=".MainActivity" > 

     <TextView 
      android:id="@+id/tv_distance_time" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="@string/hello_world" 
      android:layout_alignParentTop="true" /> 

     <fragment 
      android:id="@+id/map" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      class="com.google.android.gms.maps.SupportMapFragment" 
      android:layout_below="@id/tv_distance_time" /> 

    </RelativeLayout> 

Answer 1

あなたが使用することができますGoogle Maps Distance Matrix APIは、出発地と目的地の行列の移動距離と時間を取得します。返される情報は、開始点と終了点の間の推奨ルートに基づいています。

ここではサンプル要求だ、「HTTPS」は、このようなユーザの位置などの機密のユーザデータを含むアプリケーションに推奨されていますhttps://maps.googleapis.com/maps/api/distancematrix/output?parameters

は、Googleデベロッパーコンソールでのアプリを登録していることができます、GoogleのAPIキーを取得する必要がありますアプリに追加：https://developers.google.com/maps/documentation/android-api/signup