如何获得驱动两个位置之间的距离？ [英] How to get driving distance between two locations?
本文介绍了如何获得驱动两个位置之间的距离？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我使用GoogleMapv2 API在我的应用程序。我想画一个多边形线从源到目的地。并展示了旅行时间，以及在地图上的活动距离，但我无法找到它。请帮我。 我的code段是在这里：
公共类NavigationActivity扩展FragmentActivity {
公共静态最后弦乐TAG_SLAT =sourcelat;
公共静态最后弦乐TAG_SLONG =sourcelong;
公共静态最后弦乐TAG_DLAT =destinationlat;
公共静态最后弦乐TAG_DLONG =destinationg;
私有静态经纬度源= NULL;
私有静态经纬度目标= NULL;
私人GoogleMap的地图;
私人SupportMapFragment片段;
私人的LatLngBounds的LatLngBounds;
私人按钮bNavigation;
私人折线newPolyline;
私人标记smarker;
私人标记dmarker;
私人布尔isTraveling = FALSE;
私人诠释的宽度，高度;
私人字符串sourcelat;
私人字符串sourcelong;
私人字符串destinationg;
私人字符串destinationlat;
双板条;
双slong;
双DLAT;
双dlong;
TextView的tvDistanceDuration;
@覆盖
保护无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_navigation）;
tvDistanceDuration =（TextView中）findViewById（R.id.tv_distance_time）;
意图= getIntent（）;
sourcelat = in.getStringExtra（TAG_SLAT）;
destinationlat = in.getStringExtra（TAG_DLAT）;
destinationg = in.getStringExtra（TAG_DLONG）;
sourcelong = in.getStringExtra（TAG_SLONG）;
板条= Double.parseDouble（sourcelat）;
slong = Double.parseDouble（sourcelong）;
DLAT = Double.parseDouble（destinationlat）;
dlong = Double.parseDouble（destinationg）;
来源=新的经纬度（板条，slong）;
目标=新的经纬度（DLAT，dlong）;
getSreenDimanstions（）;
片段=（（SupportMapFragment）getSupportFragmentManager（）findFragmentById（R.id.map））;
地图= fragment.getMap（）;
如果（！isTraveling）{
isTraveling = TRUE;
findDirections（Source.latitude，Source.longitude，Destination.latitude，Destination.longitude，GMapV2Direction.MODE_DRIVING）;
DecimalFormat的DF1 =新的DecimalFormat（＃0000）;
双DLAT = Math.toRadians（DLAT - 板条）;
双dLon = Math.toRadians（dlong - slong）;
双A = Math.sin（DLAT / 2）* Math.sin（DLAT / 2）
+ Math.cos（Math.toRadians（板条））
* Math.cos（Math.toRadians（DLAT））* Math.sin（dLon / 2）
* Math.sin（dLon / 2）;
双C = 2 * Math.atan2（的Math.sqrt（一）的Math.sqrt（1 - a）条）;
双tempDistance = 6371 * C;
Log.v（SDS ...，将String.valueOf（tempDistance））;
} 其他 {
isTraveling = FALSE;
}
}
@覆盖
保护无效onResume（）{
super.onResume（）;
的LatLngBounds = createLatLngBoundsObject（源，目的地）;
map.moveCamera（CameraUpdateFactory.newLatLngBounds（的LatLngBounds，宽度，高度，150））;
}
公共无效handleGetDirectionsResult（ArrayList中＆LT;经纬度＆GT; directionPoints）{
PolylineOptions rectLine =新PolylineOptions（）宽（5）。颜色（Color.RED）。
MarkerOptions标记=新MarkerOptions().position(Source).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
MarkerOptions MARKER1 =新MarkerOptions().position(Destination).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
的for（int i = 0; I＆LT; directionPoints.size（）;我++）
{
rectLine.add（directionPoints.get（ⅰ））;
}
如果（newPolyline！= NULL）
{
newPolyline.remove（）;
}
newPolyline = map.addPolyline（rectLine）;
smarker = map.addMarker（标记）;
dmarker = map.addMarker（MARKER1）;
如果（isTraveling）
{
的LatLngBounds = createLatLngBoundsObject（源，目的地）;
map.animateCamera（CameraUpdateFactory.newLatLngBounds（的LatLngBounds，宽度，高度，150））;
}
其他
{
map.animateCamera（CameraUpdateFactory.newLatLngBounds（的LatLngBounds，宽度，高度，150））;
}
}
私人无效getSreenDimanstions（）
{
显示显示= getWindowManager（）getDefaultDisplay（）。
宽度= display.getWidth（）;
身高= display.getHeight（）;
}
私人的LatLngBounds createLatLngBoundsObject（经纬度firstLocation，经纬度secondLocation）
{
如果（firstLocation = NULL和放大器;！＆安培;！secondLocation = NULL）
{
LatLngBounds.Builder建设者=新LatLngBounds.Builder（）;
builder.include（firstLocation）.INCLUDE（secondLocation）;
返回builder.build（）;
}
返回null;
}
公共无效findDirections（双fromPositionDoubleLat，双fromPositionDoubleLong，双toPositionDoubleLat，双toPositionDoubleLong，字符串模式）
{
地图＆LT;字符串，字符串＆GT;图=新的HashMap＆LT;字符串，字符串＆GT;（）;
map.put（GetDirectionsAsyncTask.USER_CURRENT_LAT，将String.valueOf（fromPositionDoubleLat））;
map.put（GetDirectionsAsyncTask.USER_CURRENT_LONG，将String.valueOf（fromPositionDoubleLong））;
map.put（GetDirectionsAsyncTask.DESTINATION_LAT，将String.valueOf（toPositionDoubleLat））;
map.put（GetDirectionsAsyncTask.DESTINATION_LONG，将String.valueOf（toPositionDoubleLong））;
map.put（GetDirectionsAsyncTask.DIRECTIONS_MODE，模式）;
GetDirectionsAsyncTask的AsyncTask =新GetDirectionsAsyncTask（本）;
asyncTask.execute（图）
}
}
的AsyncTask类code如下.........
公共类GetDirectionsAsyncTask扩展的AsyncTask＆LT;地图＆LT;字符串，字符串＆gt;中对象的ArrayList＆LT;经纬度＆GT;＆GT;
{
公共静态最后弦乐USER_CURRENT_LAT =user_current_lat;
公共静态最后弦乐USER_CURRENT_LONG =user_current_long;
公共静态最后弦乐DESTINATION_LAT =destination_lat;
公共静态最后弦乐DESTINATION_LONG =destination_long;
公共静态最后弦乐DIRECTIONS_MODE =directions_mode;
私人NavigationActivity活动;
私人例外的例外;
私人ProgressDialog progressDialog;
公共GetDirectionsAsyncTask（NavigationActivity活动）
{
超（）;
this.activity =活动;
}
在preExecute公共无效（）
{
progressDialog =新ProgressDialog（活动）;
progressDialog.setMessage（计算方向）;
progressDialog.show（）;
}
@覆盖
公共无效onPostExecute（ArrayList的结果）
{
progressDialog.dismiss（）;
如果（例外== NULL）
{
activity.handleGetDirectionsResult（结果）;
}
其他
{
processException（）;
}
}
@覆盖
受保护的ArrayList＆LT;经纬度＆GT; doInBackground（地图＆LT;字符串，字符串＆GT; ... PARAMS）
{
地图＆LT;字符串，字符串＆GT; paramMap = PARAMS [0];
尝试
{
经纬度fromPosition =新的经纬度（Double.valueOf（paramMap.get（USER_CURRENT_LAT）），Double.valueOf（paramMap.get（USER_CURRENT_LONG）））;
经纬度toPosition =新的经纬度（Double.valueOf（paramMap.get（DESTINATION_LAT）），Double.valueOf（paramMap.get（DESTINATION_LONG）））;
GMapV2Direction MD =新GMapV2Direction（）;
文档DOC = md.getDocument（fromPosition，toPosition，paramMap.get（DIRECTIONS_MODE））;
ArrayList的＆LT;经纬度＆GT; directionPoints = md.getDirection（DOC）;
返回directionPoints;
}
赶上（例外五）
{
异常= E;
返回null;
}
}
私人无效processException（）
{
Toast.makeText（活动，错误检索数据，Toast.LENGTH_SHORT）.show（）;
}
}
和类GET方向如下：
公共类GMapV2Direction {
公共最后静态字符串MODE_DRIVING =驾驶;
公共最后静态字符串MODE_WALKING =行走;
公共GMapV2Direction（）{}
公开文件getDocument（经纬度开始，经纬度结束，字符串模式）{
字符串URL =http://maps.googleapis.com/maps/api/directions/xml？
+原产地=+ start.latitude +，+ start.longitude
+与＆amp;目的地=+ end.latitude +，+ end.longitude
+＆放大器，传感器=假放;单位=指标和放大器;模式=驾驶;
尝试 {
HttpClient的HttpClient的=新DefaultHttpClient（）;
HttpContext的localContext =新BasicHttpContext（）;
HttpPost httpPost =新HttpPost（URL）;
HTT presponse响应= httpClient.execute（httpPost，localContext）;
。InputStream的时间= response.getEntity（）的getContent（）;
DocumentBuilder的建设者= DocumentBuilderFactory.newInstance（）newDocumentBuilder（）。
文档DOC = builder.parse（中）;
返回文档;
}赶上（例外五）{
e.printStackTrace（）;
}
返回null;
}
公共字符串getDurationText（DOC文件）{
节点列表NL1 = doc.getElementsByTagName（期限）;
节点节点1 = nl1.item（0）;
节点列表NL2 = node1.getChildNodes（）;
节点节点2 = nl2.item（getNodeIndex（NL2，文本））;
Log.i（DurationText，node2.getTextContent（））;
返回node2.getTextContent（）;
}
公众诠释getDurationValue（DOC文件）{
节点列表NL1 = doc.getElementsByTagName（期限）;
节点节点1 = nl1.item（0）;
节点列表NL2 = node1.getChildNodes（）;
节点节点2 = nl2.item（getNodeIndex（NL2，值））;
Log.i（DurationValue，node2.getTextContent（））;
返回的Integer.parseInt（node2.getTextContent（））;
}
公共字符串getDistanceText（DOC文件）{
节点列表NL1 = doc.getElementsByTagName（距离）;
INT I;
//从XML最后一个标签
对于（i = 0; I＆LT; nl1.getLength（）;我++）{
}
如果（我== I）{
一世 - ;
}
节点节点1 = nl1.item（ⅰ）;
节点列表NL2 = node1.getChildNodes（）;
节点节点2 = nl2.item（getNodeIndex（NL2，文本））;
Log.i（DistanceText，node2.getTextContent（））;
返回node2.getTextContent（）;
}
公众诠释getDistanceValue（DOC文件）{
节点列表NL1 = doc.getElementsByTagName（距离）;
节点节点1 = nl1.item（0）;
节点列表NL2 = node1.getChildNodes（）;
节点节点2 = nl2.item（getNodeIndex（NL2，值））;
Log.i（DistanceValue，node2.getTextContent（））;
返回的Integer.parseInt（node2.getTextContent（））;
}
公共字符串getStartAddress（DOC文件）{
节点列表NL1 = doc.getElementsByTagName（START_ADDRESS）;
节点节点1 = nl1.item（0）;
Log.i（StartAddress开始，node1.getTextContent（））;
返回node1.getTextContent（）;
}
公共字符串getEndAddress（DOC文件）{
节点列表NL1 = doc.getElementsByTagName（end_address）;
节点节点1 = nl1.item（0）;
Log.i（StartAddress开始，node1.getTextContent（））;
返回node1.getTextContent（）;
}
公共字符串getCopyRights（DOC文件）{
节点列表NL1 = doc.getElementsByTagName（著作权）;
节点节点1 = nl1.item（0）;
Log.i（著作权，node1.getTextContent（））;
返回node1.getTextContent（）;
}
公众的ArrayList＆LT;经纬度＆GT; getDirection（DOC文件）{
节点列表NL1，NL2，NL3;
ArrayList的＆LT;经纬度＆GT; listGeopoints =新的ArrayList＆LT;经纬度＆GT;（）;
NL1 = doc.getElementsByTagName（步）;
如果（nl1.getLength（）大于0）{
的for（int i = 0; I＆LT; nl1.getLength（）;我++）{
节点节点1 = nl1.item（ⅰ）;
NL2 = node1.getChildNodes（）;
节点locationNode = nl2.item（getNodeIndex（NL2的start_location））;
NL3 = locationNode.getChildNodes（）;
节点latNode = nl3.item（getNodeIndex（NL3，纬度））;
双纬度= Double.parseDouble（latNode.getTextContent（））;
节点lngNode = nl3.item（getNodeIndex（NL3，LNG））;
双LNG = Double.parseDouble（lngNode.getTextContent（））;
listGeopoints.add（新经纬度（纬度，经度））;
locationNode = nl2.item（getNodeIndex（NL2，折线））;
NL3 = locationNode.getChildNodes（）;
latNode = nl3.item（getNodeIndex（NL3，分））;
ArrayList的＆LT;经纬度＆GT; ARR =去$ C $℃聚（latNode.getTextContent（））;
对于（INT J = 0; J＆LT; arr.size（）; J ++）{
listGeopoints.add（新经纬度（arr.get（J）.latitude，arr.get（J）.longitude））;
}
locationNode = nl2.item（getNodeIndex（NL2，END_LOCATION））;
NL3 = locationNode.getChildNodes（）;
latNode = nl3.item（getNodeIndex（NL3，纬度））;
纬度= Double.parseDouble（latNode.getTextContent（））;
lngNode = nl3.item（getNodeIndex（NL3，LNG））;
液化天然气= Double.parseDouble（lngNode.getTextContent（））;
listGeopoints.add（新经纬度（纬度，经度））;
}
}
返回listGeopoints;
}
私人诠释getNodeIndex（节点列表NL，串节点名称）{
的for（int i = 0; I＆LT; nl.getLength（）;我++）{
如果（nl.item（我）.getNodeName（）。等于（节点名称））
返回我;
}
返回-1;
}
私人的ArrayList＆LT;经纬度＆GT;德$ C $℃聚（字符串连接codeD）{
ArrayList的＆LT;经纬度＆GT;聚=新的ArrayList＆LT;经纬度＆GT;（）;
INT指数= 0，len个= EN coded.length（）;
INT纬度= 0，LNG = 0;
而（指数＆LT; LEN）{
INT B，移= 0，结果为0;
做 {
B = EN coded.charAt（指数++） - 63;
结果| =（B和0x1F的）LT;＆LT;转移;
Shift + = 5;
}而（B＆GT; = 0x20的）;
INT DLAT =（（导致＆安培; 1）= 0〜（结果＆GT;→1）：！？（导致＆GT;→1））;
纬度+ = DLAT;
移= 0;
结果= 0;
做 {
B = EN coded.charAt（指数++） - 63;
结果| =（B和0x1F的）LT;＆LT;转移;
Shift + = 5;
}而（B＆GT; = 0x20的）;
INT dlng =（（导致＆安培; 1）= 0〜（结果＆GT;→1）：！？（导致＆GT;→1））;
LNG + = dlng;
经纬度位置=新的经纬度（（双）纬度/ 1E5，（双）LNG / 1E5）;
poly.add（位置）;
}
返回聚;
}
解决方案
您可以得到Trvelling的时间和距离，下面code ..我已经使用这个code在我的项目之一，希望这将有助于您
CalculateDistanceTime distance_task =新CalculateDistanceTime（getActivity（））;
distance_task.getDirectionsUrl（startLatLng，endLatLng）;
distance_task.setLoadListener（新CalculateDistanceTime.taskCompleteListener（）{
@覆盖
公共无效taskCompleted（字符串[] time_distance）{
approximate_time.setText（+ time_distance [1]）;
approximate_diatance.setText（+ time_distance [0]）;
}
}）;
和这里是CalculateDistanceTime类。
进口android.content.Context;
进口android.os.AsyncTask;
进口android.util.Log;
进口com.google.android.gms.maps.model.LatLng;
进口org.json.JSONObject;
进口java.io.BufferedReader中;
进口java.io.IOException异常;
进口的java.io.InputStream;
进口java.io.InputStreamReader中;
进口java.net.HttpURLConnection中;
进口的java.net.URL;
进口的java.util.HashMap;
进口java.util.Iterator的;
进口的java.util.List;
进口java.util.Set中;
公共类CalculateDistanceTime {
私人taskCompleteListener mTaskListener;
私人语境mContext;
公共CalculateDistanceTime（上下文的背景下）{
mContext =背景;
}
公共无效setLoadListener（taskCompleteListener taskListener）{
mTaskListener = taskListener;
}
公共无效getDirectionsUrl（经纬度的起源，经纬度DEST）{
//路由地
字符串str_origin =原产地=+ origin.latitude +，+ origin.longitude;
//路由的目的
字符串str_dest =目标=+ dest.latitude +，+ dest.longitude;
//传感器启用
弦传感器=传感器=假;
//构建参数的web服务
字符串参数= str_origin +＆放大器; + str_dest +与＆amp; +传感器;
// 输出格式
字符串输出=JSON;
//构建URL给Web服务
字符串URL =https://maps.googleapis.com/maps/api/directions/+输出+？ +参数;
DownloadTask downloadTask =新DownloadTask（）;
//开始从谷歌路线API下载JSON数据
downloadTask.execute（URL）;
}
私人字符串downloadUrl（字符串strUrl）抛出IOException异常{
字符串数据=;
的InputStream的IStream = NULL;
HttpURLConnection类的URLConnection = NULL;
尝试 {
网址URL =新的URL（strUrl）;
//创建一个HTTP连接，与URL沟通
的URLConnection =（HttpURLConnection类）url.openConnection（）;
//连接给url
urlConnection.connect（）;
//从URL中读取数据
的IStream = urlConnection.getInputStream（）;
的BufferedReader BR =新的BufferedReader（新的InputStreamReader（的IStream））;
StringBuffer的SB =新的StringBuffer（）;
串线=;
而（（行= br.readLine（））！= NULL）{
sb.append（线）;
}
数据= sb.toString（）;
br.close（）;
}赶上（例外五）{
Log.d（异常边下载网址，e.toString（））;
} 最后 {
iStream.close（）;
urlConnection.disconnect（）;
}
返回的数据;
}
公共接口taskCompleteListener {
无效taskCompleted（字符串[] time_distance）;
}
私有类DownloadTask扩展的AsyncTask＆LT;字符串，太虚，字符串＆GT; {
//下载在非UI线程的数据
@覆盖
保护字符串doInBackground（字符串... URL）{
//从网络服务中存储的数据
字符串数据=;
尝试 {
//获取从Web服务中的数据
数据= downloadUrl（URL [0]）;
}赶上（例外五）{
Log.d（后台任务，e.toString（））;
}
返回的数据;
}
//执行的UI线程，执行后
// doInBackground（）
@覆盖
保护无效onPostExecute（字符串结果）{
super.onPostExecute（结果）;
ParserTask parserTask =新ParserTask（）;
//调用线程解析JSON数据
parserTask.execute（结果）;
}
}
私有类ParserTask扩展的AsyncTask＆LT;字符串，整数，列表＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;＆GT; {
//解析在非UI线程的数据
@覆盖
受保护的名单，其中，HashMap的＆LT;字符串，字符串＆GT;＆GT; doInBackground（字符串... jsonData）{
的JSONObject jObject;
名单＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;路线= NULL;
尝试 {
jObject =新的JSONObject（jsonData [0]）;
DistanceTimeParser分析器=新DistanceTimeParser（）;
//开始分析数据
路线= parser.parse（jObject）;
}赶上（例外五）{
e.printStackTrace（）;
}
返回路线;
}
//执行的UI线程，解析过程后，
@覆盖
保护无效onPostExecute（名单＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;的结果）{
字符串距离=;
字符串duration_distance =;
如果（result.size（）＆小于1）{
Log.e（错误：，没有找到点）;
返回;
}
的String [] date_dist =新的String [2];
//通过遍历所有路线
的for（int i = 0; I＆LT; result.size（）;我++）{
//撷取第i路线
HashMap的＆LT;字符串，字符串＆GT; tmpdata伪= result.get（ⅰ）;
设置＆LT;字符串＆GT;键= tmpData.keySet（）;
迭代它= key.iterator（）;
而（it.hasNext（））{
字符串hmKey =（字符串）it.next（）;
duration_distance = tmpData.get（hmKey）;
的System.out.println（键+ hmKey +＆放大器;数据：+ duration_distance）;
it.remove（）; //避免了ConcurrentModificationException的
}
date_dist [我] = duration_distance;
}
mTaskListener.taskCompleted（date_dist）;
}
}
}
和DistanceTimeparser
进口org.json.JSONArray;
进口org.json.JSONException;
进口org.json.JSONObject;
进口的java.util.ArrayList;
进口的java.util.HashMap;
进口的java.util.List;
公共类DistanceTimeParser {
公开名单＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;解析（JSONObject的jObject）{
名单＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;路线=新的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;（）;
JSONArray jRoutes = NULL;
JSONArray jLegs = NULL;
JSONObject的jDistance = NULL;
JSONObject的jDuration = NULL;
尝试 {
jRoutes = jObject.getJSONArray（路）;
jLegs =（（的JSONObject）jRoutes.get（0））getJSONArray（腿）。
名单＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;路径=新的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;（）;
/ **获取从JSON数据*距离/
jDistance =（（的JSONObject）jLegs.get（0））getJSONObject（距离）。
HashMap的＆LT;字符串，字符串＆GT; hmDistance =新的HashMap＆LT;字符串，字符串＆GT;（）;
hmDistance.put（距离，jDistance.getString（文本））;
/ **获取时间由JSON数据* /
jDuration =（（的JSONObject）jLegs.get（0））getJSONObject（时间）。
HashMap的＆LT;字符串，字符串＆GT; hmDuration =新的HashMap＆LT;字符串，字符串＆GT;（）;
hmDuration.put（持续时间，jDuration.getString（文本））;
routes.add（hmDistance）;
routes.add（hmDuration）;
}赶上（JSONException E）{
e.printStackTrace（）;
}赶上（例外五）{
}
返回路线;
}
}
I am using GoogleMapv2 api in my app. I want to draw a polygon line from source to destination. and show the travel time as well as distance on map activity but I am unable to find it. Please help me. My code snippet is here :
public class NavigationActivity extends FragmentActivity {
public static final String TAG_SLAT = "sourcelat";
public static final String TAG_SLONG = "sourcelong";
public static final String TAG_DLAT = "destinationlat";
public static final String TAG_DLONG = "destinationg";
private static LatLng Source = null;
private static LatLng Destination = null;
private GoogleMap map;
private SupportMapFragment fragment;
private LatLngBounds latlngBounds;
private Button bNavigation;
private Polyline newPolyline;
private Marker smarker;
private Marker dmarker;
private boolean isTraveling = false;
private int width, height;
private String sourcelat;
private String sourcelong;
private String destinationg;
private String destinationlat;
double slat;
double slong;
double dlat;
double dlong;
TextView tvDistanceDuration;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigation);
tvDistanceDuration = (TextView) findViewById(R.id.tv_distance_time);
Intent in = getIntent();
sourcelat = in.getStringExtra(TAG_SLAT);
destinationlat = in.getStringExtra(TAG_DLAT);
destinationg = in.getStringExtra(TAG_DLONG);
sourcelong = in.getStringExtra(TAG_SLONG);
slat=Double.parseDouble(sourcelat);
slong=Double.parseDouble(sourcelong);
dlat=Double.parseDouble(destinationlat);
dlong=Double.parseDouble(destinationg);
Source = new LatLng(slat,slong);
Destination = new LatLng(dlat,dlong);
getSreenDimanstions();
fragment = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map));
map = fragment.getMap();
if (!isTraveling) {
isTraveling = true;
findDirections(Source.latitude, Source.longitude, Destination.latitude, Destination.longitude, GMapV2Direction.MODE_DRIVING);
DecimalFormat df1 = new DecimalFormat("#.0000");
double dLat = Math.toRadians(dlat - slat);
double dLon = Math.toRadians(dlong - slong);
double a = Math.sin(dLat / 2) * Math.sin(dLat / 2)
+ Math.cos(Math.toRadians(slat))
* Math.cos(Math.toRadians(dlat)) * Math.sin(dLon / 2)
* Math.sin(dLon / 2);
double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
double tempDistance = 6371 * c;
Log.v("sds...", String.valueOf(tempDistance));
} else {
isTraveling = false;
}
}
@Override
protected void onResume() {
super.onResume();
latlngBounds = createLatLngBoundsObject(Source, Destination);
map.moveCamera(CameraUpdateFactory.newLatLngBounds(latlngBounds, width, height, 150));
}
public void handleGetDirectionsResult(ArrayList<LatLng> directionPoints) {
PolylineOptions rectLine = new PolylineOptions().width(5).color(Color.RED);
MarkerOptions marker = new MarkerOptions().position(Source).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
MarkerOptions marker1 = new MarkerOptions().position(Destination).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
for(int i = 0 ; i < directionPoints.size() ; i++)
{
rectLine.add(directionPoints.get(i));
}
if (newPolyline != null)
{
newPolyline.remove();
}
newPolyline = map.addPolyline(rectLine);
smarker = map.addMarker(marker);
dmarker = map.addMarker(marker1);
if (isTraveling)
{
latlngBounds = createLatLngBoundsObject(Source, Destination);
map.animateCamera(CameraUpdateFactory.newLatLngBounds(latlngBounds, width, height, 150));
}
else
{
map.animateCamera(CameraUpdateFactory.newLatLngBounds(latlngBounds, width, height, 150));
}
}
private void getSreenDimanstions()
{
Display display = getWindowManager().getDefaultDisplay();
width = display.getWidth();
height = display.getHeight();
}
private LatLngBounds createLatLngBoundsObject(LatLng firstLocation, LatLng secondLocation)
{
if (firstLocation != null && secondLocation != null)
{
LatLngBounds.Builder builder = new LatLngBounds.Builder();
builder.include(firstLocation).include(secondLocation);
return builder.build();
}
return null;
}
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);
}
}
Asynctask class code as follow.........
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 NavigationActivity activity;
private Exception exception;
private ProgressDialog progressDialog;
public GetDirectionsAsyncTask(NavigationActivity activity)
{
super();
this.activity = activity;
}
public void onPreExecute()
{
progressDialog = new ProgressDialog(activity);
progressDialog.setMessage("Calculating directions");
progressDialog.show();
}
@Override
public void onPostExecute(ArrayList 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, "Error retrieving data",Toast.LENGTH_SHORT).show();
}
}
and class for get direction is as follow :
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");
int i;
//get the last tag from XML
for(i = 0;i<nl1.getLength();i++){
}
if(i==i){
i--;
}
Node node1 = nl1.item(i);
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;
}
解决方案
You can get Trvelling time and distance with following code.. i have already use this code in one of my project hope this will help you
CalculateDistanceTime distance_task = new CalculateDistanceTime(getActivity());
distance_task.getDirectionsUrl(startLatLng, endLatLng);
distance_task.setLoadListener(new CalculateDistanceTime.taskCompleteListener() {
@Override
public void taskCompleted(String[] time_distance) {
approximate_time.setText("" + time_distance[1]);
approximate_diatance.setText("" + time_distance[0]);
}
});
and here is the CalculateDistanceTime class.
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import com.google.android.gms.maps.model.LatLng;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
public class CalculateDistanceTime {
private taskCompleteListener mTaskListener;
private Context mContext;
public CalculateDistanceTime(Context context) {
mContext = context;
}
public void setLoadListener(taskCompleteListener taskListener) {
mTaskListener = taskListener;
}
public void 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;
DownloadTask downloadTask = new DownloadTask();
// Start downloading json data from Google Directions API
downloadTask.execute(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;
}
public interface taskCompleteListener {
void taskCompleted(String[] time_distance);
}
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<HashMap<String, String>>> {
// Parsing the data in non-ui thread
@Override
protected List<HashMap<String, String>> doInBackground(String... jsonData) {
JSONObject jObject;
List<HashMap<String, String>> routes = null;
try {
jObject = new JSONObject(jsonData[0]);
DistanceTimeParser parser = new DistanceTimeParser();
// 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<HashMap<String, String>> result) {
String distance = "";
String duration_distance = "";
if (result.size() < 1) {
Log.e("Error : ", "No Points found");
return;
}
String[] date_dist = new String[2];
// Traversing through all the routes
for (int i = 0; i < result.size(); i++) {
// Fetching i-th route
HashMap<String, String> tmpData = result.get(i);
Set<String> key = tmpData.keySet();
Iterator it = key.iterator();
while (it.hasNext()) {
String hmKey = (String) it.next();
duration_distance = tmpData.get(hmKey);
System.out.println("Key: " + hmKey + " & Data: " + duration_distance);
it.remove(); // avoids a ConcurrentModificationException
}
date_dist[i] = duration_distance;
}
mTaskListener.taskCompleted(date_dist);
}
}
}
and DistanceTimeparser
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class DistanceTimeParser {
public List<HashMap<String, String>> parse(JSONObject jObject) {
List<HashMap<String, String>> routes = new ArrayList<HashMap<String, String>>();
JSONArray jRoutes = null;
JSONArray jLegs = null;
JSONObject jDistance = null;
JSONObject jDuration = null;
try {
jRoutes = jObject.getJSONArray("routes");
jLegs = ((JSONObject) jRoutes.get(0)).getJSONArray("legs");
List<HashMap<String, String>> path = new ArrayList<HashMap<String, String>>();
/** Getting distance from the json data */
jDistance = ((JSONObject) jLegs.get(0)).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(0)).getJSONObject("duration");
HashMap<String, String> hmDuration = new HashMap<String, String>();
hmDuration.put("duration", jDuration.getString("text"));
routes.add(hmDistance);
routes.add(hmDuration);
} catch (JSONException e) {
e.printStackTrace();
} catch (Exception e) {
}
return routes;
}
}
这篇关于如何获得驱动两个位置之间的距离？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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