Showing route in Google maps Android

Showing route in Google maps Android - android

i have a google map problem in android.
i sucess to show map on android. but when i want to show the route direction it getting error.
the weird think is. my code is runing well a week ago. but when i run it today, it getting error. so i try to find new code , but it failed. this is my code.
this is my road class
public class Road {
public String mName;
public String mDescription;
public int mColor;
public int mWidth;
public double[][] mRoute = new double[][] {};
public Point[] mPoints = new Point[] {};}
this is my point class
public class Point {
String mName;
String mDescription;
String mIconUrl;
double mLatitude;
double mLongitude;}
this is my mapoverlay class
public class MapOverlay extends com.google.android.maps.Overlay {
Road mRoad;
ArrayList<GeoPoint> mPoints;
public MapOverlay(Road road, MapView mv) {
mRoad = road;
if (road.mRoute.length > 0) {
mPoints = new ArrayList<GeoPoint>();
for (int i = 0; i < road.mRoute.length; i++) {
mPoints.add(new GeoPoint((int) (road.mRoute[i][1] * 1000000),
(int) (road.mRoute[i][0] * 1000000)));
}
int moveToLat = (mPoints.get(0).getLatitudeE6() + (mPoints.get(
mPoints.size() - 1).getLatitudeE6() - mPoints.get(0)
.getLatitudeE6()) / 2);
int moveToLong = (mPoints.get(0).getLongitudeE6() + (mPoints.get(
mPoints.size() - 1).getLongitudeE6() - mPoints.get(0)
.getLongitudeE6()) / 2);
GeoPoint moveTo = new GeoPoint(moveToLat, moveToLong);
MapController mapController = mv.getController();
mapController.animateTo(moveTo);
mapController.setZoom(7);
}
}
#Override
public boolean draw(Canvas canvas, MapView mv, boolean shadow, long when) {
super.draw(canvas, mv, shadow);
drawPath(mv, canvas);
return true;
}
public void drawPath(MapView mv, Canvas canvas) {
int x1 = -1, y1 = -1, x2 = -1, y2 = -1;
Paint paint = new Paint();
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(3);
for (int i = 0; i < mPoints.size(); i++) {
Point point = new Point();
mv.getProjection().toPixels(mPoints.get(i), point);
x2 = point.x;
y2 = point.y;
if (i > 0) {
canvas.drawLine(x1, y1, x2, y2, paint);
}
x1 = x2;
y1 = y2;
}
}}
this is my roadprovider class
public class RoadProvider {
public static Road getRoute(InputStream is) {
KMLHandler handler = new KMLHandler();
try {
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
parser.parse(is, handler);
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return handler.mRoad;
}
public static String getUrl(double fromLat, double fromLon, double toLat,
double toLon) {// connect to map web service
StringBuffer urlString = new StringBuffer();
urlString.append("http://maps.google.com/maps?f=d&hl=en");
urlString.append("&saddr=");// from
urlString.append(Double.toString(fromLat));
urlString.append(",");
urlString.append(Double.toString(fromLon));
urlString.append("&daddr=");// to
urlString.append(Double.toString(toLat));
urlString.append(",");
urlString.append(Double.toString(toLon));
urlString.append("&ie=UTF8&0&om=0&output=kml");
return urlString.toString();
}}
class KMLHandler extends DefaultHandler {
Road mRoad;
boolean isPlacemark;
boolean isRoute;
boolean isItemIcon;
private Stack mCurrentElement = new Stack();
private String mString;
public KMLHandler() {
mRoad = new Road();
}
public void startElement(String uri, String localName, String name,
Attributes attributes) throws SAXException {
mCurrentElement.push(localName);
if (localName.equalsIgnoreCase("Placemark")) {
isPlacemark = true;
mRoad.mPoints = addPoint(mRoad.mPoints);
} else if (localName.equalsIgnoreCase("ItemIcon")) {
if (isPlacemark)
isItemIcon = true;
}
mString = new String();
}
public void characters(char[] ch, int start, int length)
throws SAXException {
String chars = new String(ch, start, length).trim();
mString = mString.concat(chars);
}
public void endElement(String uri, String localName, String name)
throws SAXException {
if (mString.length() > 0) {
if (localName.equalsIgnoreCase("name")) {
if (isPlacemark) {
isRoute = mString.equalsIgnoreCase("Route");
if (!isRoute) {
mRoad.mPoints[mRoad.mPoints.length - 1].mName = mString;
}
} else {
mRoad.mName = mString;
}
} else if (localName.equalsIgnoreCase("color") && !isPlacemark) {
mRoad.mColor = Integer.parseInt(mString, 16);
} else if (localName.equalsIgnoreCase("width") && !isPlacemark) {
mRoad.mWidth = Integer.parseInt(mString);
} else if (localName.equalsIgnoreCase("description")) {
if (isPlacemark) {
String description = cleanup(mString);
if (!isRoute)
mRoad.mPoints[mRoad.mPoints.length - 1].mDescription = description;
else
mRoad.mDescription = description;
}
} else if (localName.equalsIgnoreCase("href")) {
if (isItemIcon) {
mRoad.mPoints[mRoad.mPoints.length - 1].mIconUrl = mString;
}
} else if (localName.equalsIgnoreCase("coordinates")) {
if (isPlacemark) {
if (!isRoute) {
String[] xyParsed = split(mString, ",");
double lon = Double.parseDouble(xyParsed[0]);
double lat = Double.parseDouble(xyParsed[1]);
mRoad.mPoints[mRoad.mPoints.length - 1].mLatitude = lat;
mRoad.mPoints[mRoad.mPoints.length - 1].mLongitude = lon;
} else {
String[] coodrinatesParsed = split(mString, " ");
int lenNew = coodrinatesParsed.length;
int lenOld = mRoad.mRoute.length;
double[][] temp = new double[lenOld + lenNew][2];
for (int i = 0; i < lenOld; i++) {
temp[i] = mRoad.mRoute[i];
}
for (int i = 0; i < lenNew; i++) {
String[] xyParsed = split(coodrinatesParsed[i], ",");
for (int j = 0; j < 2 && j < xyParsed.length; j++)
temp[lenOld + i][j] = Double
.parseDouble(xyParsed[j]);
}
mRoad.mRoute = temp;
}
}
}
}
mCurrentElement.pop();
if (localName.equalsIgnoreCase("Placemark")) {
isPlacemark = false;
if (isRoute)
isRoute = false;
} else if (localName.equalsIgnoreCase("ItemIcon")) {
if (isItemIcon)
isItemIcon = false;
}
}
private String cleanup(String value) {
String remove = "<br/>";
int index = value.indexOf(remove);
if (index != -1)
value = value.substring(0, index);
remove = " ";
index = value.indexOf(remove);
int len = remove.length();
while (index != -1) {
value = value.substring(0, index).concat(
value.substring(index + len, value.length()));
index = value.indexOf(remove);
}
return value;
}
public Point[] addPoint(Point[] points) {
Point[] result = new Point[points.length + 1];
for (int i = 0; i < points.length; i++)
result[i] = points[i];
result[points.length] = new Point();
return result;
}
private static String[] split(String strString, String strDelimiter) {
String[] strArray;
int iOccurrences = 0;
int iIndexOfInnerString = 0;
int iIndexOfDelimiter = 0;
int iCounter = 0;
if (strString == null) {
throw new IllegalArgumentException("Input string cannot be null.");
}
if (strDelimiter.length() <= 0 || strDelimiter == null) {
throw new IllegalArgumentException(
"Delimeter cannot be null or empty.");
}
if (strString.startsWith(strDelimiter)) {
strString = strString.substring(strDelimiter.length());
}
if (!strString.endsWith(strDelimiter)) {
strString += strDelimiter;
}
while ((iIndexOfDelimiter = strString.indexOf(strDelimiter,
iIndexOfInnerString)) != -1) {
iOccurrences += 1;
iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
}
strArray = new String[iOccurrences];
iIndexOfInnerString = 0;
iIndexOfDelimiter = 0;
while ((iIndexOfDelimiter = strString.indexOf(strDelimiter,
iIndexOfInnerString)) != -1) {
strArray[iCounter] = strString.substring(iIndexOfInnerString,
iIndexOfDelimiter);
iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
iCounter += 1;
}
return strArray;
}}
this is main activity
public class GoogleMap233Activity extends MapActivity {
LinearLayout linearLayout;
MapView mapView;
private Road mRoad;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
new Thread() {
#Override
public void run() {
double fromLat = 49.85, fromLon = 24.016667;
double toLat = 50.45, toLon = 30.523333;
String url = RoadProvider
.getUrl(fromLat, fromLon, toLat, toLon);
InputStream is = getConnection(url);
mRoad = RoadProvider.getRoute(is);
Log.i("Road", mRoad.mRoute.length+"");
mHandler.sendEmptyMessage(0);
}
}.start();
}
Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
TextView textView = (TextView) findViewById(R.id.description);
textView.setText(mRoad.mName + " " + mRoad.mDescription);
MapOverlay mapOverlay = new MapOverlay(mRoad, mapView);
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapView.invalidate();
};
};
private InputStream getConnection(String url) {
InputStream is = null;
try {
URLConnection conn = new URL(url).openConnection();
is = conn.getInputStream();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return is;
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
}
this code show an error in class MapOverlay() in drawPath() method in mPoints.size(). this is because mPoints is null. based on mapOverlay()'s constuctor, mPoints null because road.mRoute.length ==0. when i check roadProvider the LOG says it eror on this part
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
parser.parse(is, handler);
can someone check it for me. thanks alot.

Related

Displaying route map from source to destination

I want to draw a route map from source to destination in Google Maps .The source is tracked from GPs and destination is got from the user .I want route to be displayed between these points .I want to repaint the map everytime the location gets updated by the gps

Here is source of my map activity:
package tvarwebu.projects.map;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
public class MapProjectActivity extends MapActivity {
GeoPoint myPoint = null;
GeoPoint nextPoint = null;
MapView map;
private Road mRoad;
int latSpan = -1;
boolean moving = false;
long lastTimestamp = 0;
int pointCount = 0;
int lat = 0;
int lng = 0;
Location currLoc = null;
OverlayItem currPoint;
MyItemizedOverlay currItemizedOverlay;
List<Overlay> mapOverlays;
LocationManager lm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
map = (MapView) findViewById(R.id.mapView);
map.setBuiltInZoomControls(true);
map.setStreetView(true);
map.setSatellite(false);
// Your position initialize
lat = 53324388;
lng = -6263194;
myPoint = new GeoPoint(lat, lng);
Drawable drawable = this.getResources().getDrawable(
R.drawable.flag_green);
MyItemizedOverlay itemizedoverlay = new MyItemizedOverlay(drawable,
this);
OverlayItem overlayitem = new OverlayItem(myPoint, "Start Position",
"Your start position");
itemizedoverlay.addOverlay(overlayitem);
// Position of next point
int lat2 = 53348084;
int lng2 = -6292434;
nextPoint = new GeoPoint(lat2, lng2);
OverlayItem overlayitem2 = new OverlayItem(nextPoint, "Position",
"Position of next point");
itemizedoverlay.addOverlay(overlayitem2);
mapOverlays = map.getOverlays();
mapOverlays.add(itemizedoverlay);
Drawable draw2 = this.getResources().getDrawable(R.drawable.flag_red);
MyItemizedOverlay over2 = new MyItemizedOverlay(draw2, this);
over2.addOverlay(overlayitem2);
mapOverlays.add(over2);
// zooming to both points
int maxLatitude = Math.max(lat, lat2);
int minLatitude = Math.min(lat, lat2);
int maxLongitude = Math.max(lng, lng2);
int minLongitude = Math.min(lng, lng2);
MapController mc = map.getController();
mc.zoomToSpan(maxLatitude - minLatitude, maxLongitude - minLongitude);
mc.animateTo(new GeoPoint((maxLatitude + minLatitude) / 2,
(maxLongitude + minLongitude) / 2));
map.invalidate();
//Drawing path in new Thread
new Thread() {
#Override
public void run() {
double fromLat = Double.valueOf(myPoint.getLatitudeE6()) / 1000000.0,
fromLon = Double.valueOf(myPoint.getLongitudeE6()) / 1000000.0;
double toLat = Double.valueOf(nextPoint.getLatitudeE6()) / 1000000.0,
toLon = Double.valueOf(nextPoint.getLongitudeE6()) / 1000000.0;
String url = RoadProvider
.getUrl(fromLat, fromLon, toLat, toLon);
InputStream is = getConnection(url);
mRoad = RoadProvider.getRoute(is);
mHandler.sendEmptyMessage(0);
}
}.start();
}
Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
MapOverlay mapOverlay = new MapOverlay(mRoad, map);
List<Overlay> listOfOverlays = map.getOverlays();
// listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
map.invalidate();
};
};
private InputStream getConnection(String url) {
InputStream is = null;
try {
URLConnection conn = new URL(url).openConnection();
is = conn.getInputStream();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return is;
}
#Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
// Map extends overlay for drawing path
class MapOverlay extends com.google.android.maps.Overlay {
Road mRoad;
ArrayList<GeoPoint> mPoints;
public MapOverlay(Road road, MapView mv) {
mRoad = road;
// mRoute is field of route points getting from Google Maps
if (road.mRoute.length > 0) {
mPoints = new ArrayList<GeoPoint>();
for (int i = 0; i < road.mRoute.length; i++) {
mPoints.add(new GeoPoint(
(int) (road.mRoute[i][1] * 1000000),
(int) (road.mRoute[i][0] * 1000000)));
}
}
}
#Override
public void draw(Canvas canvas, MapView mv, boolean shadow) {
drawPath(mv, canvas);
}
public void drawPath(MapView mv, Canvas canvas) {
int x1 = -1, y1 = -1, x2 = -1, y2 = -1;
Paint paint = new Paint();
latSpan = mv.getLatitudeSpan();
paint.setColor(Color.parseColor("#998447cc"));
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(6);
if (mPoints != null) {
for (int i = 0; i < mPoints.size(); i++) {
Point point = new Point();
mv.getProjection().toPixels(mPoints.get(i), point);
x2 = point.x;
y2 = point.y;
if (i > 0) {
canvas.drawLine(x1, y1, x2, y2, paint);
}
x1 = x2;
y1 = y2;
}
}
}
}
}
In addition, you will need this files:
Road.java
package tvarwebu.projects.map;
public class Road {
public String mName;
public String mDescription;
public int mColor;
public int mWidth;
public double[][] mRoute = new double[][] {};
public Point[] mPoints = new Point[] {};
}
Point.java
package tvarwebu.projects.map;
public class Point {
String mName;
String mDescription;
String mIconUrl;
double mLatitude;
double mLongitude;
}
RoadProvider.java
package tvarwebu.projects.map;
import java.io.IOException;
import java.io.InputStream;
import java.util.Stack;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class RoadProvider {
public static Road getRoute(InputStream is) {
KMLHandler handler = new KMLHandler();
try {
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
parser.parse(is, handler);
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return handler.mRoad;
}
public static String getUrl(double fromLat, double fromLon, double toLat,
double toLon) {// connect to map web service
StringBuffer urlString = new StringBuffer();
urlString.append("http://maps.google.com/maps?f=d&hl=en");
urlString.append("&saddr=");// from
urlString.append(Double.toString(fromLat));
urlString.append(",");
urlString.append(Double.toString(fromLon));
urlString.append("&daddr=");// to
urlString.append(Double.toString(toLat));
urlString.append(",");
urlString.append(Double.toString(toLon));
urlString.append("&ie=UTF8&0&om=0&output=kml");
String ggg = urlString.toString();
return urlString.toString();
}
}
class KMLHandler extends DefaultHandler {
Road mRoad;
boolean isPlacemark;
boolean isRoute;
boolean isItemIcon;
private Stack mCurrentElement = new Stack();
private String mString;
public KMLHandler() {
mRoad = new Road();
}
public void startElement(String uri, String localName, String name,
Attributes attributes) throws SAXException {
mCurrentElement.push(localName);
if (localName.equalsIgnoreCase("Placemark")) {
isPlacemark = true;
mRoad.mPoints = addPoint(mRoad.mPoints);
} else if (localName.equalsIgnoreCase("ItemIcon")) {
if (isPlacemark)
isItemIcon = true;
}
mString = new String();
}
public void characters(char[] ch, int start, int length)
throws SAXException {
String chars = new String(ch, start, length).trim();
mString = mString.concat(chars);
}
public void endElement(String uri, String localName, String name) throws SAXException {
if (mString.length() > 0) {
if (localName.equalsIgnoreCase("name")) {
if (isPlacemark) {
isRoute = mString.equalsIgnoreCase("Route");
if (!isRoute) {
mRoad.mPoints[mRoad.mPoints.length - 1].mName = mString;
}
} else {
mRoad.mName = mString;
}
} else if (localName.equalsIgnoreCase("color") && !isPlacemark) {
mRoad.mColor = Integer.parseInt(mString, 16);
} else if (localName.equalsIgnoreCase("width") && !isPlacemark) {
mRoad.mWidth = Integer.parseInt(mString);
} else if (localName.equalsIgnoreCase("description")) {
if (isPlacemark) {
String description = cleanup(mString);
if (!isRoute)
mRoad.mPoints[mRoad.mPoints.length - 1].mDescription = description;
else
mRoad.mDescription = description;
}
} else if (localName.equalsIgnoreCase("href")) {
if (isItemIcon) {
mRoad.mPoints[mRoad.mPoints.length - 1].mIconUrl = mString;
}
} else if (localName.equalsIgnoreCase("coordinates")) {
if (isPlacemark) {
if (!isRoute) {
String[] xyParsed = split(mString, ",");
double lon = Double.parseDouble(xyParsed[0]);
double lat = Double.parseDouble(xyParsed[1]);
mRoad.mPoints[mRoad.mPoints.length - 1].mLatitude = lat;
mRoad.mPoints[mRoad.mPoints.length - 1].mLongitude = lon;
} else {
String[] coodrinatesParsed = split(mString, " ");
int count = 0;
if(mRoad.mRoute.length < 2)
mRoad.mRoute = new double[coodrinatesParsed.length][2];
else {
double[][] mRouteTmp = mRoad.mRoute;
mRoad.mRoute = new double[mRouteTmp.length + coodrinatesParsed.length][2];
//for (int i = 0; i < mRouteTmp.length; i++) {
// mRoad.mRoute[i] = mRouteTmp[i];
// mRoad.mRoute[i][i] = mRouteTmp[i][i];
//}
System.arraycopy(mRouteTmp, 0, mRoad.mRoute, 0, mRouteTmp.length);
count = mRouteTmp.length;
}
for (int i = count; i < (mRoad.mRoute.length); i++) {
String[] xyParsed = split(coodrinatesParsed[i - count], ",");
for (int j = 0; j < 2 && j < xyParsed.length; j++)
mRoad.mRoute[i][j] = Double
.parseDouble(xyParsed[j]);
}
}
}
}
}
mCurrentElement.pop();
if (localName.equalsIgnoreCase("Placemark")) {
isPlacemark = false;
if (isRoute)
isRoute = false;
} else if (localName.equalsIgnoreCase("ItemIcon")) {
if (isItemIcon)
isItemIcon = false;
}
}
private String cleanup(String value) {
String remove = "<br/>";
int index = value.indexOf(remove);
if (index != -1)
value = value.substring(0, index);
remove = " ";
index = value.indexOf(remove);
int len = remove.length();
while (index != -1) {
value = value.substring(0, index).concat(
value.substring(index + len, value.length()));
index = value.indexOf(remove);
}
return value;
}
public Point[] addPoint(Point[] mPoints) {
Point[] result = new Point[mPoints.length + 1];
for (int i = 0; i < mPoints.length; i++)
result[i] = mPoints[i];
result[mPoints.length] = new Point();
return result;
}
private static String[] split(String strString, String strDelimiter) {
String[] strArray;
int iOccurrences = 0;
int iIndexOfInnerString = 0;
int iIndexOfDelimiter = 0;
int iCounter = 0;
if (strString == null) {
throw new IllegalArgumentException("Input string cannot be null.");
}
if (strDelimiter.length() <= 0 || strDelimiter == null) {
throw new IllegalArgumentException(
"Delimeter cannot be null or empty.");
}
if (strString.startsWith(strDelimiter)) {
strString = strString.substring(strDelimiter.length());
}
if (!strString.endsWith(strDelimiter)) {
strString += strDelimiter;
}
while ((iIndexOfDelimiter = strString.indexOf(strDelimiter,
iIndexOfInnerString)) != -1) {
iOccurrences += 1;
iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
}
strArray = new String[iOccurrences];
iIndexOfInnerString = 0;
iIndexOfDelimiter = 0;
while ((iIndexOfDelimiter = strString.indexOf(strDelimiter,
iIndexOfInnerString)) != -1) {
strArray[iCounter] = strString.substring(iIndexOfInnerString,
iIndexOfDelimiter);
iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
iCounter += 1;
}
return strArray;
}
}
MyItemizedOverlay.java :
package tvarwebu.projects.map;
import java.util.ArrayList;
import android.app.AlertDialog;
import android.content.Context;
import android.graphics.drawable.Drawable;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.OverlayItem;
public class MyItemizedOverlay extends ItemizedOverlay<OverlayItem> {
private ArrayList<OverlayItem> mOverlays = new ArrayList<OverlayItem>();
private Context mContext;
public MyItemizedOverlay(Drawable defaultMarker, Context context) {
super(boundCenterBottom(defaultMarker));
mContext = context;
}
public void addOverlay(OverlayItem overlay) {
mOverlays.add(overlay);
populate();
}
#Override
protected OverlayItem createItem(int i) {
return mOverlays.get(i);
}
#Override
public int size() {
return mOverlays.size();
}
public void removeLast(){
mOverlays.remove(mOverlays.size()-1);
}
#Override
protected boolean onTap(int index) {
OverlayItem item = mOverlays.get(index);
AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.show();
return true;
}
}
Hope that this article helps you with this problem :) See the comple source code of Drawing route on MapView.

Draw a line in a Route Map

I want to draw a line in a route map. For that I use a code from here http://csie-tw.blogspot.com/2009/06/android-driving-direction-route-path.html . But It not works . It show this kind of error ((((java.lang.RuntimeException: Unable to start activity ComponentInfo{...............}: android.os.NetworkOnMainThreadException)))). My Manifest file is OK. What was the problem ?
THANK YOU for Advice.

Use Below Code for that.
MainActivity.java
public class MainActivity extends MapActivity {
LinearLayout linearLayout;
MapView mapView;
private Road mRoad;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
new Thread() {
#Override
public void run() {
double fromLat = 49.85, fromLon = 24.016667, toLat = 50.45, toLon = 30.523333;
String url = RoadProvider
.getUrl(fromLat, fromLon, toLat, toLon);
InputStream is = getConnection(url);
mRoad = RoadProvider.getRoute(is);
mHandler.sendEmptyMessage(0);
}
}.start();
}
Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
TextView textView = (TextView) findViewById(R.id.description);
textView.setText(mRoad.mName + " " + mRoad.mDescription);
MapOverlay mapOverlay = new MapOverlay(mRoad, mapView);
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapView.invalidate();
};
};
private InputStream getConnection(String url) {
InputStream is = null;
try {
URLConnection conn = new URL(url).openConnection();
is = conn.getInputStream();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return is;
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
}
class MapOverlay extends com.google.android.maps.Overlay {
Road mRoad;
ArrayList<GeoPoint> mPoints;
public MapOverlay(Road road, MapView mv) {
mRoad = road;
if (road.mRoute.length > 0) {
mPoints = new ArrayList<GeoPoint>();
for (int i = 0; i < road.mRoute.length; i++) {
mPoints.add(new GeoPoint((int) (road.mRoute[i][1] * 1000000),
(int) (road.mRoute[i][0] * 1000000)));
}
int moveToLat = (mPoints.get(0).getLatitudeE6() + (mPoints.get(
mPoints.size() - 1).getLatitudeE6() - mPoints.get(0)
.getLatitudeE6()) / 2);
int moveToLong = (mPoints.get(0).getLongitudeE6() + (mPoints.get(
mPoints.size() - 1).getLongitudeE6() - mPoints.get(0)
.getLongitudeE6()) / 2);
GeoPoint moveTo = new GeoPoint(moveToLat, moveToLong);
MapController mapController = mv.getController();
mapController.animateTo(moveTo);
mapController.setZoom(7);
}
}
#Override
public boolean draw(Canvas canvas, MapView mv, boolean shadow, long when) {
super.draw(canvas, mv, shadow);
drawPath(mv, canvas);
return true;
}
public void drawPath(MapView mv, Canvas canvas) {
int x1 = -1, y1 = -1, x2 = -1, y2 = -1;
Paint paint = new Paint();
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(3);
for (int i = 0; i < mPoints.size(); i++) {
Point point = new Point();
mv.getProjection().toPixels(mPoints.get(i), point);
x2 = point.x;
y2 = point.y;
if (i > 0) {
canvas.drawLine(x1, y1, x2, y2, paint);
}
x1 = x2;
y1 = y2;
}
}
}
Add following classes
Point.java
public class Point {
String mName;
String mDescription;
String mIconUrl;
double mLatitude;
double mLongitude;
}
Road.java
public class Road {
public String mName;
public String mDescription;
public int mColor;
public int mWidth;
public double[][] mRoute = new double[][] {};
public Point[] mPoints = new Point[] {};
}
RoadProvider.java
public class RoadProvider {
public static Road getRoute(InputStream is) {
KMLHandler handler = new KMLHandler();
try {
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
parser.parse(is, handler);
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return handler.mRoad;
}
public static String getUrl(double fromLat, double fromLon, double toLat,
double toLon) {// connect to map web service
StringBuffer urlString = new StringBuffer();
urlString.append("http://maps.google.com/maps?f=d&hl=en");
urlString.append("&saddr=");// from
urlString.append(Double.toString(fromLat));
urlString.append(",");
urlString.append(Double.toString(fromLon));
urlString.append("&daddr=");// to
urlString.append(Double.toString(toLat));
urlString.append(",");
urlString.append(Double.toString(toLon));
urlString.append("&ie=UTF8&0&om=0&output=kml");
return urlString.toString();
}
}
class KMLHandler extends DefaultHandler {
Road mRoad;
boolean isPlacemark;
boolean isRoute;
boolean isItemIcon;
private Stack<String> mCurrentElement = new Stack<String>();
private String mString;
public KMLHandler() {
mRoad = new Road();
}
public void startElement(String uri, String localName, String name,
Attributes attributes) throws SAXException {
mCurrentElement.push(localName);
if (localName.equalsIgnoreCase("Placemark")) {
isPlacemark = true;
mRoad.mPoints = addPoint(mRoad.mPoints);
} else if (localName.equalsIgnoreCase("ItemIcon")) {
if (isPlacemark)
isItemIcon = true;
}
mString = new String();
}
public void characters(char[] ch, int start, int length)
throws SAXException {
String chars = new String(ch, start, length).trim();
mString = mString.concat(chars);
}
public void endElement(String uri, String localName, String name)
throws SAXException {
if (mString.length() > 0) {
if (localName.equalsIgnoreCase("name")) {
if (isPlacemark) {
isRoute = mString.equalsIgnoreCase("Route");
if (!isRoute) {
mRoad.mPoints[mRoad.mPoints.length - 1].mName = mString;
}
} else {
mRoad.mName = mString;
}
} else if (localName.equalsIgnoreCase("color") && !isPlacemark) {
mRoad.mColor = Integer.parseInt(mString, 16);
} else if (localName.equalsIgnoreCase("width") && !isPlacemark) {
mRoad.mWidth = Integer.parseInt(mString);
} else if (localName.equalsIgnoreCase("description")) {
if (isPlacemark) {
String description = cleanup(mString);
if (!isRoute)
mRoad.mPoints[mRoad.mPoints.length - 1].mDescription = description;
else
mRoad.mDescription = description;
}
} else if (localName.equalsIgnoreCase("href")) {
if (isItemIcon) {
mRoad.mPoints[mRoad.mPoints.length - 1].mIconUrl = mString;
}
} else if (localName.equalsIgnoreCase("coordinates")) {
if (isPlacemark) {
if (!isRoute) {
String[] xyParsed = split(mString, ",");
double lon = Double.parseDouble(xyParsed[0]);
double lat = Double.parseDouble(xyParsed[1]);
mRoad.mPoints[mRoad.mPoints.length - 1].mLatitude = lat;
mRoad.mPoints[mRoad.mPoints.length - 1].mLongitude = lon;
} else {
String[] coodrinatesParsed = split(mString, " ");
int lenNew = coodrinatesParsed.length;
int lenOld = mRoad.mRoute.length;
double[][] temp = new double[lenOld + lenNew][2];
for (int i = 0; i < lenOld; i++) {
temp[i] = mRoad.mRoute[i];
}
for (int i = 0; i < lenNew; i++) {
String[] xyParsed = split(coodrinatesParsed[i], ",");
for (int j = 0; j < 2 && j < xyParsed.length; j++)
temp[lenOld + i][j] = Double
.parseDouble(xyParsed[j]);
}
mRoad.mRoute = temp;
}
}
}
}
mCurrentElement.pop();
if (localName.equalsIgnoreCase("Placemark")) {
isPlacemark = false;
if (isRoute)
isRoute = false;
} else if (localName.equalsIgnoreCase("ItemIcon")) {
if (isItemIcon)
isItemIcon = false;
}
}
private String cleanup(String value) {
String remove = "<br/>";
int index = value.indexOf(remove);
if (index != -1)
value = value.substring(0, index);
remove = " ";
index = value.indexOf(remove);
int len = remove.length();
while (index != -1) {
value = value.substring(0, index).concat(
value.substring(index + len, value.length()));
index = value.indexOf(remove);
}
return value;
}
public Point[] addPoint(Point[] points) {
Point[] result = new Point[points.length + 1];
for (int i = 0; i < points.length; i++)
result[i] = points[i];
result[points.length] = new Point();
return result;
}
private static String[] split(String strString, String strDelimiter) {
String[] strArray;
int iOccurrences = 0;
int iIndexOfInnerString = 0;
int iIndexOfDelimiter = 0;
int iCounter = 0;
if (strString == null) {
throw new IllegalArgumentException("Input string cannot be null.");
}
if (strDelimiter.length() <= 0 || strDelimiter == null) {
throw new IllegalArgumentException(
"Delimeter cannot be null or empty.");
}
if (strString.startsWith(strDelimiter)) {
strString = strString.substring(strDelimiter.length());
}
if (!strString.endsWith(strDelimiter)) {
strString += strDelimiter;
}
while ((iIndexOfDelimiter = strString.indexOf(strDelimiter,
iIndexOfInnerString)) != -1) {
iOccurrences += 1;
iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
}
strArray = new String[iOccurrences];
iIndexOfInnerString = 0;
iIndexOfDelimiter = 0;
while ((iIndexOfDelimiter = strString.indexOf(strDelimiter,
iIndexOfInnerString)) != -1) {
strArray[iCounter] = strString.substring(iIndexOfInnerString,
iIndexOfDelimiter);
iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
iCounter += 1;
}
return strArray;
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/description"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<com.google.android.maps.MapView
android:id="#+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:apiKey="Your API Key"
android:clickable="true" />
</LinearLayout>
Add below permissions into your android manifest file.
<uses-permission android:name="android.permission.INTERNET"/>

Road Path in android

I'm new in android and I'm testing an application that provides the road path in android. But I have many errors in here (like shown below).
public class MapRouteActivity extends MapActivity {
LinearLayout linearLayout;
MapView mapView;
private Road mRoad;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
new Thread() {
#Override
public void run() {
double fromLat = 49.85, fromLon = 24.016667, toLat = 50.45, toLon = 30.523333;
String url = RoadProvider
.getUrl(fromLat, fromLon, toLat, toLon);
InputStream is = getConnection(url);
mRoad = RoadProvider.getRoute(is);
mHandler.sendEmptyMessage(0);
}
}.start();
}
Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
TextView textView = (TextView) findViewById(R.id.description);
textView.setText(mRoad.mName + " " + mRoad.mDescription);
MapOverlay mapOverlay = new MapOverlay(mRoad, mapView);
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapView.invalidate();
};
};
private InputStream getConnection(String url) {
InputStream is = null;
try {
URLConnection conn = new URL(url).openConnection();
is = conn.getInputStream();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return is;
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
}
class MapOverlay extends com.google.android.maps.Overlay {
Road mRoad;
ArrayList<GeoPoint> mPoints;
public MapOverlay(Road road, MapView mv) {
mRoad = road;
if (road.mRoute.length > 0) {
mPoints = new ArrayList<GeoPoint>();
for (int i = 0; i < road.mRoute.length; i++) {
mPoints.add(new GeoPoint((int) (road.mRoute[i][1] * 1000000),
(int) (road.mRoute[i][0] * 1000000)));
}
int moveToLat = (mPoints.get(0).getLatitudeE6() + (mPoints.get(
mPoints.size() - 1).getLatitudeE6() - mPoints.get(0)
.getLatitudeE6()) / 2);
int moveToLong = (mPoints.get(0).getLongitudeE6() + (mPoints.get(
mPoints.size() - 1).getLongitudeE6() - mPoints.get(0)
.getLongitudeE6()) / 2);
GeoPoint moveTo = new GeoPoint(moveToLat, moveToLong);
MapController mapController = mv.getController();
mapController.animateTo(moveTo);
mapController.setZoom(7);
}
}
#Override
public boolean draw(Canvas canvas, MapView mv, boolean shadow, long when) {
super.draw(canvas, mv, shadow);
drawPath(mv, canvas);
return true;
}
public void drawPath(MapView mv, Canvas canvas) {
int x1 = -1, y1 = -1, x2 = -1, y2 = -1;
Paint paint = new Paint();
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(3);
for (int i = 0; i < mPoints.size(); i++) {
Point point = new Point();
mv.getProjection().toPixels(mPoints.get(i), point);
x2 = point.x;
y2 = point.y;
if (i > 0) {
canvas.drawLine(x1, y1, x2, y2, paint);
}
x1 = x2;
y1 = y2;
}
}
}
while i lunch this code i have all these error like bellow :
07-30 14:03:08.969: W/dalvikvm(6934): Unable to resolve superclass of Lcom/test/MapRouteActivity; (17)
07-30 14:03:08.969: W/dalvikvm(6934): Link of class 'Lcom/test/MapRouteActivity;' failed
07-30 14:03:08.969: W/dalvikvm(6934): threadid=1: thread exiting with uncaught exception (group=0x2aac87c8)
07-30 14:03:08.979: E/AndroidRuntime(6934): FATAL EXCEPTION: main
07-30 14:03:08.979: E/AndroidRuntime(6934): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.test/com.test.MapRouteActivity}: java.lang.ClassNotFoundException: com.test.MapRouteActivity in loader dalvik.system.PathClassLoader[/data/app/com.test-1.apk]
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.os.Handler.dispatchMessage(Handler.java:99)
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.os.Looper.loop(Looper.java:123)
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-30 14:03:08.979: E/AndroidRuntime(6934): at java.lang.reflect.Method.invokeNative(Native Method)
07-30 14:03:08.979: E/AndroidRuntime(6934): at java.lang.reflect.Method.invoke(Method.java:521)
07-30 14:03:08.979: E/AndroidRuntime(6934): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-30 14:03:08.979: E/AndroidRuntime(6934): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-30 14:03:08.979: E/AndroidRuntime(6934): at dalvik.system.NativeStart.main(Native Method)
07-30 14:03:08.979: E/AndroidRuntime(6934): Caused by: java.lang.ClassNotFoundException: com.test.MapRouteActivity in loader dalvik.system.PathClassLoader[/data/app/com.test-1.apk]
07-30 14:03:08.979: E/AndroidRuntime(6934): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
07-30 14:03:08.979: E/AndroidRuntime(6934): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
07-30 14:03:08.979: E/AndroidRuntime(6934): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
07-30 14:03:08.979: E/AndroidRuntime(6934): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
07-30 14:03:08.979: E/AndroidRuntime(6934): ... 11 more

Use Below Code Snippet
private List<Overlay> mapOverlays;
private Projection projection;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
linearLayout = (LinearLayout) findViewById(R.id.zoomview);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
mapOverlays = mapView.getOverlays();
projection = mapView.getProjection();
mapOverlays.add(new MyOverlay());
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
class MyOverlay extends Overlay{
public MyOverlay(){
}
public void draw(Canvas canvas, MapView mapv, boolean shadow){
super.draw(canvas, mapv, shadow);
Paint mPaint = new Paint();
mPaint.setDither(true);
mPaint.setColor(Color.RED);
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(2);
GeoPoint gP1 = new GeoPoint(19240000,-99120000);
GeoPoint gP2 = new GeoPoint(37423157, -122085008);
Point p1 = new Point();
Point p2 = new Point();
Path path = new Path();
projection.toPixels(gP1, p1);
projection.toPixels(gP2, p2);
path.moveTo(p2.x, p2.y);
path.lineTo(p1.x,p1.y);
canvas.drawPath(path, mPaint);
}

Use below code for Draw Route Path.
MainActivity.java
public class MainActivity extends MapActivity {
LinearLayout linearLayout;
MapView mapView;
private Road mRoad;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
new Thread() {
#Override
public void run() {
double fromLat = 49.85, fromLon = 24.016667, toLat = 50.45, toLon = 30.523333;
String url = RoadProvider
.getUrl(fromLat, fromLon, toLat, toLon);
InputStream is = getConnection(url);
mRoad = RoadProvider.getRoute(is);
mHandler.sendEmptyMessage(0);
}
}.start();
}
Handler mHandler = new Handler() {
public void handleMessage(android.os.Message msg) {
TextView textView = (TextView) findViewById(R.id.description);
textView.setText(mRoad.mName + " " + mRoad.mDescription);
MapOverlay mapOverlay = new MapOverlay(mRoad, mapView);
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapView.invalidate();
};
};
private InputStream getConnection(String url) {
InputStream is = null;
try {
URLConnection conn = new URL(url).openConnection();
is = conn.getInputStream();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return is;
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
}
class MapOverlay extends com.google.android.maps.Overlay {
Road mRoad;
ArrayList<GeoPoint> mPoints;
public MapOverlay(Road road, MapView mv) {
mRoad = road;
if (road.mRoute.length > 0) {
mPoints = new ArrayList<GeoPoint>();
for (int i = 0; i < road.mRoute.length; i++) {
mPoints.add(new GeoPoint((int) (road.mRoute[i][1] * 1000000),
(int) (road.mRoute[i][0] * 1000000)));
}
int moveToLat = (mPoints.get(0).getLatitudeE6() + (mPoints.get(
mPoints.size() - 1).getLatitudeE6() - mPoints.get(0)
.getLatitudeE6()) / 2);
int moveToLong = (mPoints.get(0).getLongitudeE6() + (mPoints.get(
mPoints.size() - 1).getLongitudeE6() - mPoints.get(0)
.getLongitudeE6()) / 2);
GeoPoint moveTo = new GeoPoint(moveToLat, moveToLong);
MapController mapController = mv.getController();
mapController.animateTo(moveTo);
mapController.setZoom(7);
}
}
#Override
public boolean draw(Canvas canvas, MapView mv, boolean shadow, long when) {
super.draw(canvas, mv, shadow);
drawPath(mv, canvas);
return true;
}
public void drawPath(MapView mv, Canvas canvas) {
int x1 = -1, y1 = -1, x2 = -1, y2 = -1;
Paint paint = new Paint();
paint.setColor(Color.GREEN);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(3);
for (int i = 0; i < mPoints.size(); i++) {
Point point = new Point();
mv.getProjection().toPixels(mPoints.get(i), point);
x2 = point.x;
y2 = point.y;
if (i > 0) {
canvas.drawLine(x1, y1, x2, y2, paint);
}
x1 = x2;
y1 = y2;
}
}
}
Add following classes
Point.java
public class Point {
String mName;
String mDescription;
String mIconUrl;
double mLatitude;
double mLongitude;
}
Road.java
public class Road {
public String mName;
public String mDescription;
public int mColor;
public int mWidth;
public double[][] mRoute = new double[][] {};
public Point[] mPoints = new Point[] {};
}
RoadProvider.java
public class RoadProvider {
public static Road getRoute(InputStream is) {
KMLHandler handler = new KMLHandler();
try {
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
parser.parse(is, handler);
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return handler.mRoad;
}
public static String getUrl(double fromLat, double fromLon, double toLat,
double toLon) {// connect to map web service
StringBuffer urlString = new StringBuffer();
urlString.append("http://maps.google.com/maps?f=d&hl=en");
urlString.append("&saddr=");// from
urlString.append(Double.toString(fromLat));
urlString.append(",");
urlString.append(Double.toString(fromLon));
urlString.append("&daddr=");// to
urlString.append(Double.toString(toLat));
urlString.append(",");
urlString.append(Double.toString(toLon));
urlString.append("&ie=UTF8&0&om=0&output=kml");
return urlString.toString();
}
}
class KMLHandler extends DefaultHandler {
Road mRoad;
boolean isPlacemark;
boolean isRoute;
boolean isItemIcon;
private Stack<String> mCurrentElement = new Stack<String>();
private String mString;
public KMLHandler() {
mRoad = new Road();
}
public void startElement(String uri, String localName, String name,
Attributes attributes) throws SAXException {
mCurrentElement.push(localName);
if (localName.equalsIgnoreCase("Placemark")) {
isPlacemark = true;
mRoad.mPoints = addPoint(mRoad.mPoints);
} else if (localName.equalsIgnoreCase("ItemIcon")) {
if (isPlacemark)
isItemIcon = true;
}
mString = new String();
}
public void characters(char[] ch, int start, int length)
throws SAXException {
String chars = new String(ch, start, length).trim();
mString = mString.concat(chars);
}
public void endElement(String uri, String localName, String name)
throws SAXException {
if (mString.length() > 0) {
if (localName.equalsIgnoreCase("name")) {
if (isPlacemark) {
isRoute = mString.equalsIgnoreCase("Route");
if (!isRoute) {
mRoad.mPoints[mRoad.mPoints.length - 1].mName = mString;
}
} else {
mRoad.mName = mString;
}
} else if (localName.equalsIgnoreCase("color") && !isPlacemark) {
mRoad.mColor = Integer.parseInt(mString, 16);
} else if (localName.equalsIgnoreCase("width") && !isPlacemark) {
mRoad.mWidth = Integer.parseInt(mString);
} else if (localName.equalsIgnoreCase("description")) {
if (isPlacemark) {
String description = cleanup(mString);
if (!isRoute)
mRoad.mPoints[mRoad.mPoints.length - 1].mDescription = description;
else
mRoad.mDescription = description;
}
} else if (localName.equalsIgnoreCase("href")) {
if (isItemIcon) {
mRoad.mPoints[mRoad.mPoints.length - 1].mIconUrl = mString;
}
} else if (localName.equalsIgnoreCase("coordinates")) {
if (isPlacemark) {
if (!isRoute) {
String[] xyParsed = split(mString, ",");
double lon = Double.parseDouble(xyParsed[0]);
double lat = Double.parseDouble(xyParsed[1]);
mRoad.mPoints[mRoad.mPoints.length - 1].mLatitude = lat;
mRoad.mPoints[mRoad.mPoints.length - 1].mLongitude = lon;
} else {
String[] coodrinatesParsed = split(mString, " ");
int lenNew = coodrinatesParsed.length;
int lenOld = mRoad.mRoute.length;
double[][] temp = new double[lenOld + lenNew][2];
for (int i = 0; i < lenOld; i++) {
temp[i] = mRoad.mRoute[i];
}
for (int i = 0; i < lenNew; i++) {
String[] xyParsed = split(coodrinatesParsed[i], ",");
for (int j = 0; j < 2 && j < xyParsed.length; j++)
temp[lenOld + i][j] = Double
.parseDouble(xyParsed[j]);
}
mRoad.mRoute = temp;
}
}
}
}
mCurrentElement.pop();
if (localName.equalsIgnoreCase("Placemark")) {
isPlacemark = false;
if (isRoute)
isRoute = false;
} else if (localName.equalsIgnoreCase("ItemIcon")) {
if (isItemIcon)
isItemIcon = false;
}
}
private String cleanup(String value) {
String remove = "<br/>";
int index = value.indexOf(remove);
if (index != -1)
value = value.substring(0, index);
remove = " ";
index = value.indexOf(remove);
int len = remove.length();
while (index != -1) {
value = value.substring(0, index).concat(
value.substring(index + len, value.length()));
index = value.indexOf(remove);
}
return value;
}
public Point[] addPoint(Point[] points) {
Point[] result = new Point[points.length + 1];
for (int i = 0; i < points.length; i++)
result[i] = points[i];
result[points.length] = new Point();
return result;
}
private static String[] split(String strString, String strDelimiter) {
String[] strArray;
int iOccurrences = 0;
int iIndexOfInnerString = 0;
int iIndexOfDelimiter = 0;
int iCounter = 0;
if (strString == null) {
throw new IllegalArgumentException("Input string cannot be null.");
}
if (strDelimiter.length() <= 0 || strDelimiter == null) {
throw new IllegalArgumentException(
"Delimeter cannot be null or empty.");
}
if (strString.startsWith(strDelimiter)) {
strString = strString.substring(strDelimiter.length());
}
if (!strString.endsWith(strDelimiter)) {
strString += strDelimiter;
}
while ((iIndexOfDelimiter = strString.indexOf(strDelimiter,
iIndexOfInnerString)) != -1) {
iOccurrences += 1;
iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
}
strArray = new String[iOccurrences];
iIndexOfInnerString = 0;
iIndexOfDelimiter = 0;
while ((iIndexOfDelimiter = strString.indexOf(strDelimiter,
iIndexOfInnerString)) != -1) {
strArray[iCounter] = strString.substring(iIndexOfInnerString,
iIndexOfDelimiter);
iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
iCounter += 1;
}
return strArray;
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/description"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<com.google.android.maps.MapView
android:id="#+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:apiKey="Your API Key"
android:clickable="true" />
</LinearLayout>
Add below permissions into your android manifest file.
<uses-permission android:name="android.permission.INTERNET"/>

Draw line between two points in google map in android [duplicate]

This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Drawing a line/path on Google Maps
How can i draw line beetween two points in google map?

public class DrivingDirection extends MapActivity implements
IDirectionsListener {
Button btnRedirectHome;
Vector<GeoPoint> mapData = new Vector<GeoPoint>();
Vector<GeoPoint> NearData = new Vector<GeoPoint>();
MapView mapView;
MapController mc;
GeoPoint p;
GeoPoint endpoint;
MapOverlay mapOverlay;
private AlertDialog.Builder alertDialog1, alertDialog;
boolean exception = false;
// ** Called when the activity is first created. *//*
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.courtdetaildetdirection_layout);
mapView = (MapView) findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
mc = mapView.getController();
Bundle extras = getIntent().getExtras();
String courtId = extras != null ? extras.getString("CourtId") : "";
if(GUIStatics.previousActivityNameFalg.equalsIgnoreCase("MatchDetailActivity"))
{
if (GUIStatiMethods
.connectionCheck(DrivingDirection.this)) {
Court_Player_LocationFatcher objectCourt_Player_LocationFatch = new Court_Player_LocationFatcher();
objectCourt_Player_LocationFatch.Court_Player_LocationFatch(GUIStatics.strUserID,courtId);
final CourtDetailFatcher myCourtDetailFatcher = new CourtDetailFatcher();
myCourtDetailFatcher.CourtDetailFatch(courtId);
}
}
else if(GUIStatics.previousActivityNameFalg.equalsIgnoreCase("FavoritesActivity"))
{
if (GUIStatiMethods
.connectionCheck(DrivingDirection.this)) {
Court_Player_LocationFatcher objectCourt_Player_LocationFatch = new Court_Player_LocationFatcher();
objectCourt_Player_LocationFatch.Court_Player_LocationFatch(GUIStatics.strUserID,courtId);
final CourtDetailFatcher myCourtDetailFatcher = new CourtDetailFatcher();
myCourtDetailFatcher.CourtDetailFatch(courtId);
}
}
else
{
if (GUIStatiMethods
.connectionCheck(DrivingDirection.this)) {
Court_Player_LocationFatcher objectCourt_Player_LocationFatch = new Court_Player_LocationFatcher();
objectCourt_Player_LocationFatch.Court_Player_LocationFatch(GUIStatics.strUserID,courtId);
final CourtDetailFatcher myCourtDetailFatcher = new CourtDetailFatcher();
myCourtDetailFatcher.CourtDetailFatch(courtId);
}
}
TextView TextViewCourtDetailHeader = (TextView) this
.findViewById(R.id.TextViewCourtDetailHeader);
TextView TextViewCourtDetailAddress = (TextView) this
.findViewById(R.id.TextViewCourtDetailAddress);
TextView TextViewCourtDetailNoOfCourtAndType = (TextView) this
.findViewById(R.id.TextViewCourtDetailNoOfCourtAndType);
TextView TextViewCourtDetailCourtType = (TextView) this
.findViewById(R.id.TextViewCourtDetailCourtType);
TextView TextViewCourtDetailLight = (TextView) this
.findViewById(R.id.TextViewCourtDetailLight);
TextViewCourtDetailHeader
.setText(CourtDetailDataHandler.object.COURTNAME);
TextViewCourtDetailAddress
.setText(CourtDetailDataHandler.object.COURTADDRESS);
TextViewCourtDetailNoOfCourtAndType
.setText(CourtDetailDataHandler.object.NUMBEROFCOURT);
TextViewCourtDetailCourtType
.setText(CourtDetailDataHandler.object.COURTTYPE);
TextViewCourtDetailLight.setText("Lights: "
+ CourtDetailDataHandler.object.COURTLIGHT);
String url = "http://maps.google.com/maps?f=d&hl=en&saddr="
+ Court_Player_LocationHandler.mCOURTLAT + ","
+ Court_Player_LocationHandler.mCOURTLON + "&daddr="
+ Court_Player_LocationHandler.mUSERLAT + ","
+ Court_Player_LocationHandler.mUSERLON
+ "&ie=UTF8&0&om=0&z=20&output=kml";
Document d = GetDataFromServer(url);
if (exception) {
exception = false;
GeoPoint source = new GeoPoint(
(int) (Double
.parseDouble(Court_Player_LocationHandler.mCOURTLAT) * 1E6),
(int) (Double
.parseDouble(Court_Player_LocationHandler.mCOURTLON) * 1E6));
mapData.add(source);
GeoPoint destination = new GeoPoint(
(int) (Double
.parseDouble(Court_Player_LocationHandler.mUSERLAT) * 1E6),
(int) (Double
.parseDouble(Court_Player_LocationHandler.mUSERLON) * 1E6));
mapData.add(destination);
} else {
ParseServerData(d);
}
LinearLayout zoomLayout = (LinearLayout) findViewById(R.id.zoom);
View zoomView = mapView.getZoomControls();
zoomLayout.addView(zoomView, new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
mapView.displayZoomControls(true);
mc = mapView.getController();
for (int i = 0; i < mapData.size(); i++) {
GeoPoint gp = mapData.get(i);
mc.animateTo(gp);
}
for (int i = 0; i < NearData.size(); i++) {
GeoPoint gp = mapData.get(i);
mc.animateTo(gp);
}
mc.setZoom(18);
// ---Add a location marker---
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapView.invalidate();
}
class MapOverlay extends com.google.android.maps.Overlay {
Paint innerPaint;
int infoWindowOffsetX, infoWindowOffsetY, testX, testY, id;
boolean showWindow = false;
Bitmap bitmap, bmp, bitMoreInformation;
String argName;
boolean temp = true;
#Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow,
long when) {
super.draw(canvas, mapView, shadow);
bmp = BitmapFactory.decodeResource(getResources(),
R.drawable.marker);
// ---translate the GeoPoint to screen pixels---
Paint myPaintBlack1 = new Paint();
myPaintBlack1.setColor(Color.BLUE);
myPaintBlack1.setStyle(Style.STROKE);
myPaintBlack1.setStrokeWidth(4f);
Point screenPts[] = new Point[mapData.size()];
for (int i = 0; i < mapData.size(); i++) {
Point screenPt = new Point();
GeoPoint gp = mapData.get(i);
mapView.getProjection().toPixels(gp, screenPt);// screenPts[i]);
screenPts[i] = screenPt;
if (i == 0)
canvas.drawBitmap(bmp, screenPts[i].x - bmp.getWidth() / 2,
screenPts[i].y - bmp.getHeight(), null);
if (i == mapData.size() - 1)
canvas.drawBitmap(bmp, screenPts[i].x - bmp.getWidth() / 2,
screenPts[i].y - bmp.getHeight(), null);
}
for (int i = 0; i < NearData.size(); i++) {
Point screenPs = new Point();
GeoPoint gp = mapData.get(i);
mapView.getProjection().toPixels(gp, screenPs);// screenPts[i]);
canvas.drawBitmap(bmp, screenPs.x - bmp.getWidth() / 2,
screenPs.y - bmp.getHeight(), null);
}
for (int i = 1; i < screenPts.length; i++) {
canvas.drawLine(screenPts[i - 1].x, screenPts[i - 1].y,
screenPts[i].x, screenPts[i].y, myPaintBlack1);
}
return true;
}
public Paint getInnerPaint() {
if (innerPaint == null) {
innerPaint = new Paint();
innerPaint.setARGB(225, 75, 75, 75); // gray
innerPaint.setAntiAlias(true);
}
return innerPaint;
}
#Override
public boolean onTap(GeoPoint p, MapView mapView) {
return true;
}
}
public Document GetDataFromServer(String url) {
try {
URL updateURL = new URL(url);
URLConnection conn = updateURL.openConnection();
InputStream is = conn.getInputStream();
DocumentBuilderFactory factory = DocumentBuilderFactory
.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(is);
is.close();
return document;
} catch (Exception e) {
exception = true;
System.out.print("Exception:-" + e);
}
exception = true;
return null;
}
private void ParseServerData(Document doc) {
Element rootElement = doc.getDocumentElement();
rootElement.normalize();
NodeList nodeLst = doc.getElementsByTagName("LookAt");
int c = nodeLst.getLength();
System.out.println("count= " + c);
for (int s = 0; s < nodeLst.getLength(); s++) {
Node fstNode = nodeLst.item(s);
if (fstNode.getNodeType() == Node.ELEMENT_NODE) {
// Points p = new Points();
Element Elmnt = (Element) fstNode;
double lat = Double
.parseDouble(getTextValue(Elmnt, "latitude"));
double lng = Double
.parseDouble(getTextValue(Elmnt, "longitude"));
GeoPoint gp = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6));
mapData.add(gp);
}
}
}
public String getTextValue(Element ele, String tagName) {
String textVal = "";
NodeList nl = ele.getElementsByTagName(tagName);
if (nl != null && nl.getLength() > 0) {
Element el = (Element) nl.item(0);
NodeList ndlist = el.getChildNodes();
Node node = ndlist.item(0);
if (node != null)
textVal = node.getNodeValue();
}
return textVal;
}
// handler for the background updating
Handler progressHandler = new Handler() {
public void handleMessage(Message msg) {
}
};
#Override
protected boolean isRouteDisplayed() {
return false;
}
public void onDirectionsAvailable(Route route,
com.cipl.Courts.DrivingDirections.Mode mode) {
}
public void onDirectionsNotAvailable() {
}
}
The above code draw line between two point on Map in android.

How can I parse out points and draw a route on a Google Map in Android?

How do I get points & draw the route on Google maps in Android OS?

An example URL you're going to parse is...
http://maps.googleapis.com/maps/api/directions/xml?origin=52.31,16.71&destination=51.27,6.75&sensor=false
change origin [lat,long] and destination[lat, long] for your purpose
--
points fetching
import java.io.StringReader;
import java.util.ArrayList;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;
import net.gynsoft.citydusseldorf.lib.HttpClient;
import android.os.Handler;
import com.google.android.maps.GeoPoint;
public class MapRoute
{
private GeoPoint gpSrc = null;
private GeoPoint gpDest = null;
private ArrayList<GeoPoint> alRoute = new ArrayList<GeoPoint>();
private Handler haRoute = new Handler();
public interface RouteListener
{
public void onDetermined(ArrayList<GeoPoint> alPoint);
public void onError();
}
private RouteListener oRoute = null;
public MapRoute(GeoPoint gpSrc,GeoPoint gpDest)
{
this.gpSrc = gpSrc;
this.gpDest = gpDest;
}
public void getPoints(RouteListener oRoute)
{
this.oRoute = oRoute;
new Thread(ruFetch).start();
}
private Runnable ruFetchOk = new Runnable()
{
public void run()
{
oRoute.onDetermined(alRoute);
}
};
private Runnable ruFetchError = new Runnable()
{
public void run()
{
oRoute.onDetermined(alRoute);
}
};
private Runnable ruFetch = new Runnable()
{
public void run()
{
String szUrl = "http://maps.googleapis.com/maps/api/directions/xml";
szUrl += "?origin=" + (gpSrc.getLatitudeE6()/1e6) + "," + (gpSrc.getLongitudeE6()/1e6);
szUrl += "&destination=" + (gpDest.getLatitudeE6()/1e6) + "," + (gpDest.getLongitudeE6()/1e6);
szUrl += "&sensor=true";
HttpClient oHttp = HttpClient.getInstance();
String szXml = oHttp.doGet(szUrl,"");
try
{
XmlPullParserFactory xppfFactory = XmlPullParserFactory.newInstance();
xppfFactory.setNamespaceAware(true);
XmlPullParser xppParses = xppfFactory.newPullParser();
xppParses.setInput(new StringReader(szXml));
int iEventType = xppParses.getEventType();
String szTag = "";
String szText = "";
boolean bStep = false;
int iLat = 0;
int iLong = 0;
while(iEventType != XmlPullParser.END_DOCUMENT)
{
iEventType = xppParses.next();
if(iEventType == XmlPullParser.START_TAG)
{
szTag = xppParses.getName();
if(szTag.equals("step"))
bStep = true;
}
else if(iEventType == XmlPullParser.TEXT)
{
if(szTag.equals("points"))
szText = "";
else
szText = xppParses.getText().trim();
}
else if(iEventType == XmlPullParser.END_TAG)
{
if(xppParses.getName().equals("step"))
{
bStep = false;
}
else if(bStep && xppParses.getName().equals("start_location") || xppParses.getName().equals("end_location"))
{
GeoPoint gpPoint = new GeoPoint(iLat,iLong);
alRoute.add(gpPoint);
}
else if(bStep && xppParses.getName().equals("lat"))
{
iLat = (int)(Double.parseDouble(szText) * 1e6);
}
else if(bStep && xppParses.getName().equals("lng"))
{
iLong = (int)(Double.parseDouble(szText) * 1e6);
}
}
}
}
catch(Exception e)
{
e.printStackTrace();
haRoute.post(ruFetchError);
}
if(alRoute.size() == 0)
haRoute.post(ruFetchError);
else
haRoute.post(ruFetchOk);
}
};
}
--
map overlay
public class MapRouteOverlay extends Overlay
{
private GeoPoint gp1;
private GeoPoint gp2;
private int mode=0;
private int defaultColor;
public MapRouteOverlay(GeoPoint gp1,GeoPoint gp2,int mode) // GeoPoint is a int. (6E)
{
this.gp1 = gp1;
this.gp2 = gp2;
this.mode = mode;
defaultColor = 999; // no defaultColor
}
public MapRouteOverlay(GeoPoint gp1,GeoPoint gp2,int mode, int defaultColor)
{
this.gp1 = gp1;
this.gp2 = gp2;
this.mode = mode;
this.defaultColor = defaultColor;
}
public int getMode()
{
return mode;
}
public boolean draw (Canvas canvas, MapView mapView, boolean shadow, long when)
{
Projection projection = mapView.getProjection();
if (shadow == false)
{
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setDither(true);
Point point = new Point();
projection.toPixels(gp1, point);
if(mode==2)
{
if(defaultColor==999)
{
paint.setColor(Color.RED);
}
else
{
paint.setColor(defaultColor);
Point point2 = new Point();
projection.toPixels(gp2, point2);
paint.setStrokeWidth(5);
paint.setAlpha(120);
canvas.drawLine(point.x, point.y, point2.x,point2.y, paint);
}
}
}
return super.draw(canvas, mapView, shadow, when);
}
}
--
how to use it... somewhere in my activity
dEmpty = new BitmapDrawable(Bitmap.createBitmap(1,1,Bitmap.Config.ARGB_8888));
dPin = getResources().getDrawable(R.drawable.pin_map);
private void doDrawPath(GeoPoint gpSrc,GeoPoint gpDest)
{
MapRoute oRoute = new MapRoute(gpSrc,gpDest);
oRoute.getPoints(new RouteListener()
{
#Override
public void onDetermined(ArrayList<GeoPoint> alPoint)
{
GeoPoint oPointA = null;
GeoPoint oPointB = null;
mvMap.getOverlays().clear();
for(int i=1; i<alPoint.size()-1; i++)
{
oPointA = alPoint.get(i-1);
oPointB = alPoint.get(i);
mvMap.getOverlays().add(new MapRouteOverlay(oPointA,oPointB,2,Color.RED));
}
mvMap.getOverlays().add(new MapRoutePinOverlay(alPoint.get(0),dPin));
mvMap.getOverlays().add(new MapRoutePinOverlay(alPoint.get(alPoint.size()-1),dPin));
mvMap.invalidate();
}
#Override
public void onError()
{
}
});
}

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Showing route in Google maps Android - android

Related

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Draw a line in a Route Map

Road Path in android

Draw line between two points in google map in android [duplicate]

How can I parse out points and draw a route on a Google Map in Android?

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