Android - 在地图上显示多条路线时删除直线
在我的应用程序中，使用Google mapv2 API在源和目标之间显示地图和多条路线。唯一的问题是，在地图上显示多条路线时，一条直线与正确的路线一起出现。我想摆脱源和目的地之间的直线。我试图找到过去两天的方法。请指导我。
DisplayMap.java
PolylineOptions rectLine = null;
if(result.equalsIgnoreCase("exception caught")){
Toast.makeText(getApplicationContext(), "INVALID VALUES", Toast.LENGTH_LONG).show();
}
else{
if (weakRef.get() != null && ! weakRef.get().isFinishing()){
// if(response.equalsIgnoreCase("Success")){
ArrayList<LatLng> directionPoint = v2GetRouteDirection.getDirection(document);
int duration = v2GetRouteDirection.getDurationValue(document);
Log.e("TRAFFIC DURATIONTIME",""+duration);
int trfficClearTime = v2GetRouteDirection.getDistanceValue(document);
Log.e("TRAFFIC TIME", ""+trfficClearTime);
Markeropition.position(myposition).icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED))
.flat(true);
Markeropition2.position(myposition2).icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
.flat(true);
Markeropition.draggable(true);
Markeropition2.draggable(true);
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(myposition,10));
googleMap.addMarker(Markeropition);
googleMap.addMarker(Markeropition2);
rectLine = new PolylineOptions().width(5).color(Color.RED);
for (int i = 0; i < directionPoint.size(); i++) {
rectLine.add(directionPoint.get(i));
}
googleMap.addPolyline(rectLine);
showDirection.setText("");
// Convert from Unicode to UTF-8
ArrayList<String> dir = v2GetRouteDirection.getDirectionPanel(document);
if(dir.size()!=0){
for(int i=0;i<dir.size();i++){
String goDirections=dir.get(i).replaceAll("\\<.*?>","");
showDirection.append(goDirections+"\n");
Log.e("SIZE", ""+dir.size());
Log.e("PANEL", goDirections);
}
}
else{
Toast.makeText(getApplicationContext(), "no value", Toast.LENGTH_LONG).show();
}
String alter = v2GetRouteDirection.getAlternativeRoutes(document);
Log.e("ALTER", alter);
}
}
gmpv2directions.java（用于绘制路线）
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&alternatives=true";
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(0);
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 ArrayList<String> getDirectionPanel(Document doc){
Node node1 = null;
ArrayList<String> arry = new ArrayList<String>();
NodeList nl1 = doc.getElementsByTagName("html_instructions");
for(int i = 0;i<nl1.getLength();i++){
node1 = nl1.item(i);
arry.add(node1.getTextContent());
Log.i("DIRECTION PANEL", node1.getTextContent());
}
return arry;
}
public String getAlternativeRoutes(Document doc){
NodeList nl1;
Node firstNode=null;
Node first = null;
NodeList nodeList = doc.getElementsByTagName("route");
if(nodeList.getLength()>0){
for(int j=0;j<nodeList.getLength();j++){
Node node1 = nodeList.item(j);
nl1 = node1.getChildNodes();
first = nl1.item(getNodeIndex(nl1, "summary"));
Log.e("FIRST", first.getTextContent());
}
}
return first.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));
locationNode = nl2.item(getNodeIndex(nl2, "start_location"));
}
}
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;
}
}
提前致谢！
2 个答案:
答案 0 :(得分：2)
请暂停How to draw free hand polygon in Google map V2 in Android?
那里有同样的深入讨论......
请查看列表部分，了解那里发生的事情。
您的逻辑可以定期检查源点和目标点。之后，您只需要创建一个将在地图上绘制路径的常用方法。
答案 1 :(得分：1)
问题是你将所有路线的所有步骤变为单个ArrayList，因此第一条路线的最后一点后面是第二条路线的第一点。
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