两个地点之间的行驶距离和旅行时间
Posted
技术标签:
【中文标题】两个地点之间的行驶距离和旅行时间【英文标题】：Driving distance and travel time duration between two locations 【发布时间】：2016-07-14 20:08:33 【问题描述】：我正在做一个安卓应用程序，我需要查找距离和旅行时间 通过在 android mapV2 中给出两个 lat/lang 点，在两个位置之间。 我使用的例子是Driving distance and travel time duration between two locations in Google Map Android API V2
我在这段代码中有太多错误和拼写错误，请帮我解决这个问题。
我正在使用 android 密钥，它是否适用于 google places api 和 direction api？？
清单：
<?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>
主要活动：
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_
android:layout_
tools:context=".MainActivity" >
<TextView
android:id="@+id/tv_distance_time"
android:layout_
android:layout_
android:text="@string/hello_world"
android:layout_alignParentTop="true" />
<fragment
android:id="@+id/map"
android:layout_
android:layout_
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_below="@id/tv_distance_time" />
</RelativeLayout>
【问题讨论】：
【参考方案1】：您可以使用Google Maps Distance Matrix API 获取出发地和目的地矩阵的旅行距离和时间。返回的信息基于起点和终点之间的推荐路线。
这是一个示例请求，对于包含敏感用户数据（例如用户位置）的应用程序，建议使用“HTTPS”：https://maps.googleapis.com/maps/api/distancematrix/output?parameters
您必须在 Google Developers Console 上注册您的应用并获得一个 Google API 密钥，您可以将其添加到您的应用中：https://developers.google.com/maps/documentation/android-api/signup
【讨论】：
第二个链接坏了。 Mahendra Gunawardena 是的，我知道，如何连接此链接？通过 Android Api kie 或服务器密钥，请帮助我，我的时间不多了...以上是关于两个地点之间的行驶距离和旅行时间的主要内容，如果未能解决你的问题，请参考以下文章