我非常沮丧 - 我有一个简单的Android应用程序，我试图在渲染地图后使用谷歌地图方向API获取方向。我得到的XML响应是REQUEST_DENIED。
请帮忙!!!我不是android的专家，还在学习技巧......这就是hptts请求： -
我之前也发过这个问题，但没有得到任何回应。 提前谢谢..
我的完整代码： - （主要课程）。
public class MainActivity extends FragmentActivity {
MapDirection md ;
LatLng fromPosition;
LatLng toPosition;
ArrayList<LatLng>ToFrom;
Document doc;
ArrayList<LatLng> directionPoint;
PolylineOptions rectLine;
//Intent MapProcessIntent;
ArrayList<LatLng> markerpoints;
LocationManager lm;
GoogleMap map;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
setContentView(R.layout.activity_main);
markerpoints = new ArrayList<LatLng>();
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_HIGH);
String provider = lm.getBestProvider(criteria, true);
Location currentLocation = lm.getLastKnownLocation(provider);
SupportMapFragment fm =(SupportMapFragment)this.getSupportFragmentManager().findFragmentById(R.id.map);
map = fm.getMap();
if (map != null){
map.setMyLocationEnabled(true);
CameraPosition cameraPosition= new CameraPosition.Builder().target(new LatLng(currentLocation.getLatitude(),
currentLocation.getLongitude())).zoom(13).build();
map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
LatLng fromPosition = new LatLng(37.258507,-121.967533);
LatLng toPosition = new LatLng(37.236064,-121.961595);
map.addMarker(new MarkerOptions().position(fromPosition).title("Start"));
map.addMarker(new MarkerOptions().position(toPosition).title("End"));
//TextView textview = (TextView)this.findViewById(R.id.mainstring);
//textview.setText("making the web service call..");
//fromPosition = new LatLng(37.258507,-121.967533);
//toPosition = new LatLng(37.236064,-121.961595);
ToFrom = new ArrayList<LatLng>();
ToFrom.add(fromPosition);
ToFrom.add(toPosition);
//MapProcessIntent = new Intent(this, MapProcess.class);
//Document doc = md.getDocument(fromPosition, toPosition, MapDirection.MODE_DRIVING);
/*if (doc.hasChildNodes()== true)
{
System.out.println("This document has child nodes..");
}
if (doc != null){
//ArrayList<LatLng> directionPoint = md.getDirection(doc);
//PolylineOptions rectLine = new PolylineOptions().width(3).color(Color.RED);
for(int i = 0 ; i < directionPoint.size() ; i++) {
rectLine.add(directionPoint.get(i));
}*/
MakeWebCall mwc = new MakeWebCall();
mwc.execute(ToFrom);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
private class MakeWebCall extends AsyncTask<ArrayList<LatLng>, Void, Document>
{
@Override
protected Document doInBackground(ArrayList<LatLng>...list ) {
Document d = null;
LatLng From = (LatLng)list[0].get(0);
LatLng To= (LatLng)list[0].get(1);
// params comes from the execute() call: params[0] is the list
try {
md= new MapDirection();
d = md.getDocument(From, To, MapDirection.MODE_DRIVING);
} catch (Exception e) {
System.out.println(" Some error "+ e.getMessage());
}
return d;
}
// onPostExecute displays the results of the AsyncTask.
@Override
protected void onPostExecute(Document doc) {
if ( doc !=null){
directionPoint = md.getDirection(doc);
if ( directionPoint.isEmpty()== false){
rectLine = new PolylineOptions().width(3).color(Color.RED);
for(int i = 0 ; i < directionPoint.size() ; i++) {
rectLine.add(directionPoint.get(i));
}
if ( rectLine !=null){
Polyline pl= map.addPolyline(rectLine);
if ( pl != null){
pl.setVisible(true);
System.out.println(" I GOT IT");
}
//String polylineStr = "POLYLINE";
//MapProcessIntent.putExtra(polylineStr, rectLine);
//startActivity(MapProcessIntent);
}
}
else
{
System.out.println(" document is empty");
}
}
}
}
}
我的MapDirection文件（执行Web服务调用:)：
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import android.os.StrictMode;
import android.util.Log;
import com.google.android.gms.maps.model.LatLng;
class MapDirection {
public final static String MODE_DRIVING = "driving";
public final static String MODE_WALKING = "walking";
public MapDirection() { }
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 {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
String hosturl="https://maps.googleapis.com/maps/api/directions/xml?";
String newstring = "origin=" + start.latitude + "," + start.longitude
+ "&destination=" + end.latitude + ","+ end.longitude + "&sensor=true";
//37.255666,-121.967683
//37.258507,-121.967533
//String newstring = "origin=37.2345487,-121.5840723&destination=37.236064,-121.961595&sensor=true";
String newurl = URLEncoder.encode(newstring, "UTF-8");
String finalurl = hosturl + newurl;
System.out.println("web service call: "+finalurl);
HttpPost httpPost = new HttpPost(finalurl);
HttpResponse response = httpClient.execute(httpPost, localContext);
InputStream in = response.getEntity().getContent();
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(in);
System.out.println(" Returned valid document");
return doc;
} catch (IllegalArgumentException e) {
System.out.println(" Web service returned IllegalArgumentException:"+ e.getMessage());
e.printStackTrace();
return null;
}
catch(IOException f){
System.out.println(" Web service returned IOException:"+ f.getMessage());
f.printStackTrace();
return null;
}
catch(IllegalStateException g){
System.out.println(" Web service returned IllegalStateException:"+ g.getMessage());
g.printStackTrace();
return null;
}
catch(ParserConfigurationException h){
System.out.println(" Web service returned ParserConfigurationException:"+ h.getMessage());
h.printStackTrace();
return null;
}
catch(SAXException i){
System.out.println(" Web service returned SAXException:"+ i.getMessage());
i.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");
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 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,statusList;
ArrayList<LatLng> listGeopoints = new ArrayList<LatLng>();
statusList = doc.getElementsByTagName("status");
if (statusList.getLength()> 0){
System.out.println(" Status result of XML response for direction API:"+statusList.item(0).getTextContent());
}
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;
}
}
让我发布我的清单文件..
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.menonmatics.mapapplication"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.INTERNET"/>
<permission
android:name="com.menonmatics.mapapplication.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.menonmatics.mapapplication.permission.MAPS_RECEIVE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.menonmatics.mapapplication.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MapProcess"
android:label="Map Rendering">
<intent-filter>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="<tooitout"/>
</application>
</manifest>
答案 0 :(得分：-1)
查看此示例google direction
试试这个：
try {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
String hosturl="https://maps.googleapis.com/maps/api/directions/xml?";
String newstring = "origin=" + start.latitude + "," + start.longitude
+ "&destination=" + end.latitude + ","+ end.longitude + "&sensor=true";
//37.255666,-121.967683
//37.258507,-121.967533
//String newstring = "origin=37.2345487,-121.5840723&destination=37.236064,-121.961595&sensor=true";
//String newurl = URLEncoder.encode(newstring, "UTF-8");
String finalurl = hosturl + newstring;
System.out.println("web service call: "+finalurl);
HttpPost httpPost = new HttpPost(finalurl);
HttpResponse response = httpClient.execute(httpPost, localContext);
InputStream in = response.getEntity().getContent();
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(in);
System.out.println(" Returned valid document");
return doc;
}