I'm trying to validate a clickable route functionality using google map API.
I established route display between two coordinates using the map API. To realize this, I used the following tutorial http://csie-tw.blogspot.com/2009/06/android-driving-direction-route-path.html , which basically parse a KML file (the response of a google map direction request) and use a custom map overlay to draw a route. **Custom Overlay :** package com.test.route; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Point; import android.graphics.RectF; import android.util.Log; import android.view.MotionEvent; import com.google.android.maps.GeoPoint; import com.google.android.maps.MapView; import com.google.android.maps.Overlay; import com.google.android.maps.Projection; public class MyOverLay extends Overlay { private GeoPoint gp1; private GeoPoint gp2; private int mRadius=6; private int mode=0; private int defaultColor; private String text=""; private Bitmap img = null; public MyOverLay(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 MyOverLay(GeoPoint gp1,GeoPoint gp2,int mode, int defaultColor) { this.gp1 = gp1; this.gp2 = gp2; this.mode = mode; this.defaultColor = defaultColor; } public void setText(String t) { this.text = t; } public void setBitmap(Bitmap bitmap) { this.img = bitmap; } public int getMode() { return mode; } @Override 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); Point point = new Point(); projection.toPixels(gp1, point); // mode=1¡Gstart if(mode==1) { if(defaultColor==999) paint.setColor(Color.BLUE); else paint.setColor(defaultColor); RectF oval=new RectF(point.x - mRadius, point.y - mRadius, point.x + mRadius, point.y + mRadius); // start point canvas.drawOval(oval, paint); } // mode=2¡Gpath else 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); } /* mode=3¡Gend */ else if(mode==3) { /* the last path */ if(defaultColor==999) paint.setColor(Color.GREEN); 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); RectF oval=new RectF(point2.x - mRadius,point2.y - mRadius, point2.x + mRadius,point2.y + mRadius); /* end point */ paint.setAlpha(255); canvas.drawOval(oval, paint); } /* mode=4¡Gcar */ else if(mode==4) { if(defaultColor==999) paint.setColor(Color.GREEN); else paint.setColor(defaultColor); Point point2 = new Point(); projection.toPixels(gp2, point2); paint.setTextSize(20); paint.setAntiAlias(true); canvas.drawBitmap(img, point2.x, point2.y,paint); canvas.drawText(this.text, point2.x, point2.y, paint); } else if(mode==5) { if(defaultColor==999) paint.setColor(Color.GREEN); else paint.setColor(defaultColor); Point point2 = new Point(); projection.toPixels(gp2, point2); paint.setTextSize(20); paint.setAntiAlias(true); canvas.drawBitmap(img, point2.x, point2.y,paint); } } return super.draw(canvas, mapView, shadow, when); } @Override public boolean onTouchEvent(MotionEvent event, MapView mapView) { Log.i("Map", "Clicked"); return false; } } **Test Map Activity :** package com.test.route; import java.io.IOException; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.xml.sax.SAXException; import android.content.Intent; import android.graphics.Color; import android.net.Uri; import android.os.Bundle; import android.util.Log; import com.dailymates.carmate.utils.MyOverLay; import com.google.android.maps.GeoPoint; import com.google.android.maps.MapActivity; import com.google.android.maps.MapView; public class TestMap extends MapActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.map); MapView mapView = (MapView) findViewById(R.id.mapview); /* * Defining the starting and end point of the route (latitude / longitude) * Oh Paris * */ final double src_lat = 48.847378; final double src_long = 2.340417; final double dest_lat = 48.931466; final double dest_long = 2.504525; GeoPoint srcGeoPoint = new GeoPoint((int) (src_lat * 1E6), (int) (src_long * 1E6)); GeoPoint destGeoPoint = new GeoPoint((int) (dest_lat * 1E6), (int) (dest_long * 1E6)); DrawPath(srcGeoPoint, destGeoPoint, Color.GREEN, mapView); mapView.getController().animateTo(srcGeoPoint); mapView.getController().setZoom(12); } protected boolean isRouteDisplayed() { return false; } private void DrawPath(GeoPoint src, GeoPoint dest, int color, MapView mMapView01) { StringBuilder urlString = new StringBuilder(); urlString.append("http://maps.google.com/maps?f=d&hl=en";); urlString.append("&saddr="); urlString.append(Double.toString((double) src.getLatitudeE6() / 1.0E6)); urlString.append(","); urlString.append(Double.toString((double) src.getLongitudeE6() / 1.0E6)); urlString.append("&daddr=");// to urlString.append(Double.toString((double) dest.getLatitudeE6() / 1.0E6)); urlString.append(","); urlString.append(Double.toString((double) dest.getLongitudeE6() / 1.0E6)); urlString.append("&ie=UTF8&0&om=0&output=kml"); Log.d("xxx", "URL=" + urlString.toString()); Document doc = null; HttpURLConnection urlConnection = null; URL url = null; try { url = new URL(urlString.toString()); urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setRequestMethod("GET"); urlConnection.setDoOutput(true); urlConnection.setDoInput(true); urlConnection.connect(); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); doc = db.parse(urlConnection.getInputStream()); if (doc.getElementsByTagName("GeometryCollection").getLength() > 0) { String path = doc.getElementsByTagName("GeometryCollection") .item(0).getFirstChild().getFirstChild() .getFirstChild().getNodeValue(); Log.d("xxx", "path=" + path); String[] pairs = path.split(" "); String[] lngLat = pairs[0].split(","); // lngLat[0]=longitude // lngLat[1]=latitude // lngLat[2]=height GeoPoint startGP = new GeoPoint((int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6)); mMapView01.getOverlays().add(new MyOverLay(startGP, startGP, 1)); GeoPoint gp1; GeoPoint gp2 = startGP; for (int i = 1; i < pairs.length; i++) { lngLat = pairs[i].split(","); gp1 = gp2; gp2 = new GeoPoint( (int) (Double.parseDouble(lngLat[1]) * 1E6), (int) (Double.parseDouble(lngLat[0]) * 1E6)); mMapView01.getOverlays().add( new MyOverLay(gp1, gp2, 2, color)); Log.d("xxx", "pair:" + pairs[i]); } mMapView01.getOverlays().add(new MyOverLay(dest, dest, 3)); } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } } } So, as I said, I correctly get a route drawing. But how could I handle click events on those drawn routes ? For information, I was thinking about something which would probably be inefficient, but I'll tell it, we never knows :) Since the route establishement is basicaly a succession of drawings beetween two geopoints (segments), we could prehaps handle route clicking this way : - Using the `onTouchEvent` method of the map overlay, we can get the geopoint associated to a click. - Then we try to establish if the clicked geopoint is part of a route segment. One last information : Several routes will be drawn on the map at the same instant, so the click must be associated to a unique route and not all of them. Thanks. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
