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    <p>go through this codes. Modify the code as per ur requirement</p> <p>MapDirection.java:</p> <pre><code>public class MapDirection extends MapActivity{ MapView mapview; MapRouteOverlay mapoverlay; Context _context; List&lt;Overlay&gt; maplistoverlay; Drawable drawable,drawable2; MapOverlay mapoverlay2,mapoverlay3; GeoPoint srcpoint,destpoint; Overlay overlayitem; public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); setContentView(R.layout.map_direction); RegisterActivities.registerActivity(this); mapview=(MapView)this.findViewById(R.id.mapview); callMap(); } private void callMap() { srcpoint=new GeoPoint((int)(Data.src_lat_date*1E6),(int)(Data.src_long_data*1E6)); maplistoverlay=mapview.getOverlays(); drawable=this.getResources().getDrawable(R.drawable.green_a); mapoverlay2=new MapOverlay(drawable); OverlayItem overlayitem = new OverlayItem(srcpoint, "", ""); mapoverlay2.addOverlay(overlayitem); maplistoverlay.add(mapoverlay2); destpoint=new GeoPoint((int)(Data.dest_lat_data*1E6),(int)(Data.dest_long_data*1E6)); drawable2=this.getResources().getDrawable(R.drawable.green_b); mapoverlay3=new MapOverlay(drawable2); OverlayItem overlayitem3 = new OverlayItem(destpoint, "", ""); mapoverlay3.addOverlay(overlayitem3); maplistoverlay.add(mapoverlay3); double dest_lat = Data.dest_lat_data; double dest_long = Data.dest_long_data; GeoPoint srcGeoPoint = new GeoPoint((int) (Data.src_lat_date* 1E6), (int) (Data.src_long_data * 1E6)); GeoPoint destGeoPoint = new GeoPoint((int) (dest_lat * 1E6), (int) (dest_long * 1E6)); DrawPath(srcGeoPoint, destGeoPoint, Color.BLUE, mapview); mapview.getController().animateTo(srcGeoPoint); mapview.getController().setZoom(13); //mapview.setStreetView(true); mapview.setBuiltInZoomControls(true); mapview.invalidate(); } private void DrawPath(GeoPoint src, GeoPoint dest, int color, MapView mMapView01) { // connect to map web service StringBuilder urlString = new StringBuilder(); urlString.append("http://maps.google.com/maps?f=d&amp;hl=en"); urlString.append("&amp;saddr=");//from urlString.append( Double.toString((double)src.getLatitudeE6()/1.0E6 )); urlString.append(","); urlString.append( Double.toString((double)src.getLongitudeE6()/1.0E6 )); urlString.append("&amp;daddr=");//to urlString.append( Double.toString((double)dest.getLatitudeE6()/1.0E6 )); urlString.append(","); urlString.append( Double.toString((double)dest.getLongitudeE6()/1.0E6 )); urlString.append("&amp;ie=UTF8&amp;0&amp;om=0&amp;output=kml"); Log.d("xxx","URL="+urlString.toString()); //System.out.println(urlString); // get the kml (XML) doc. And parse it to get the coordinates(direction route). 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()&gt;0) { //String path = doc.getElementsByTagName("GeometryCollection").item(0).getFirstChild().getFirstChild().getNodeName(); 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 // src GeoPoint startGP = new GeoPoint((int)(Double.parseDouble(lngLat[1])*1E6),(int)(Double.parseDouble(lngLat[0])*1E6)); //mMapView01.getOverlays().add(overlayitem); GeoPoint gp1; GeoPoint gp2 = startGP; for(int i=1;i&lt;pairs.length;i++) // the last one would be crash { lngLat = pairs[i].split(","); gp1 = gp2; // watch out! For GeoPoint, first:latitude, second:longitude gp2 = new GeoPoint((int)(Double.parseDouble(lngLat[1])*1E6),(int)(Double.parseDouble(lngLat[0])*1E6)); mMapView01.getOverlays().add(new MapRouteOverlay(gp1,gp2,2,color)); Log.d("xxx","pair:" + pairs[i]); } //mMapView01.getOverlays().add(new MapRouteOverlay(dest,dest, 3)); // use the default color } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } } </code></pre> <p>MapRouteOverlay.java:</p> <pre><code>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); 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); } } </code></pre> <p>MapOverlay.java:</p> <pre><code>public class MapOverlay extends ItemizedOverlay { private ArrayList&lt;OverlayItem&gt; mOverlays = new ArrayList&lt;OverlayItem&gt;(); public MapOverlay(Drawable _defaultMarker) { super(boundCenterBottom(_defaultMarker)); } @Override protected OverlayItem createItem(int i) { return mOverlays.get(i); } public void addOverlay(OverlayItem overlay) { mOverlays.add(overlay); populate(); } @Override public int size() { return mOverlays.size(); } } </code></pre>
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    1. USSudipta Som
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    1. COWhen using this, i get: android.app.IntentReceiverLeaked: Activity dk.lector.ao.mobile.shop.map.EmbeddedMapViewActivity has leaked IntentReceiver com.google.android.maps.NetworkConnectivityListener$ConnectivityBroadcastReceiver@4139a3b8 that was originally registered here. Are you missing a call to unregisterReceiver()? Any can this be right?
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      1. USAnders Metnik
    2. COcomplete "der wahnsinn" in german :))) thx a lot
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    3. COHey, what's `R.drawable.green_a` and `R.drawable.green_b`?
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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