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POAndroid project for displaing driving routes not working
 

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  1. POAndroid project for displaing driving routes not working
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    <p>I am developing an android app for displaying driving routes between 2 points by following this tutorial- <a href="http://asmncl.blogspot.co.uk/2012/04/android-draw-route-map-between-two.html" rel="nofollow">http://asmncl.blogspot.co.uk/2012/04/android-draw-route-map-between-two.html</a> , but my app is stopping after I run it. I am not using kml,as I know kml is no longer supported by Google. But, when I run this code, its stopping. Can someone tell me, what could be the reason?</p> <p><strong>EDIT</strong> It turns out that I didnot included the google map library in my androidmanfest.xml. Now, its not showing any error, but after installing it on the phone its crashing. Can anyone tell me, why?</p> <p>Thanks</p> <p><strong>RoutePath-Main Activity</strong></p> <pre><code>public class RoutePath extends MapActivity { MapView mapView; private RoutePath _activity; GeoPoint srcGeoPoint,destGeoPoint; private static List&lt;Overlay&gt; mOverlays; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); SharedData data = SharedData.getInstance(); mapView = new MapView(this,data.getAPIKEY()); mapView.setClickable(true); setContentView(mapView); _activity = this; double src_lat = data.getSrc_lat(); double src_long = data.getSrc_lng(); double dest_lat = data.getDest_lat(); double dest_long = data.getDest_lng(); if(src_lat == -1 || src_long == -1 || dest_lat == -1 || dest_long == -1){ showAlert("Please enter source and destination points"); }else{ srcGeoPoint = new GeoPoint((int) (src_lat * 1E6),(int) (src_long * 1E6)); destGeoPoint = new GeoPoint((int) (dest_lat * 1E6),(int) (dest_long * 1E6)); List&lt;Overlay&gt; mapOverlays = mapView.getOverlays(); Drawable srcdrawable = this.getResources().getDrawable(R.drawable.pin_green); CustomItemizedOverlay srcitemizedOverlay = new CustomItemizedOverlay(srcdrawable); //CustomItemizedOverlay srcitemizedOverlay = new CustomItemizedOverlay(getDrawable("com/agarwal/route/pin_green.png")); OverlayItem srcoverlayitem = new OverlayItem(srcGeoPoint, "Hello!", "This is your Location."); Drawable destdrawable = this.getResources().getDrawable(R.drawable.pin_red); CustomItemizedOverlay destitemizedOverlay = new CustomItemizedOverlay( destdrawable ); // CustomItemizedOverlay destitemizedOverlay = new CustomItemizedOverlay(getDrawable("com/agarwal/route/pin_red.png")); OverlayItem destoverlayitem = new OverlayItem(destGeoPoint, "Hello!", "This is dest Location."); srcitemizedOverlay.addOverlay(srcoverlayitem); destitemizedOverlay.addOverlay(destoverlayitem); mapOverlays.add(srcitemizedOverlay); mapOverlays.add(destitemizedOverlay); connectAsyncTask _connectAsyncTask = new connectAsyncTask(); _connectAsyncTask.execute(); mapView.setBuiltInZoomControls(true); mapView.displayZoomControls(true); mOverlays = mapView.getOverlays(); mapView.getController().animateTo(srcGeoPoint); mapView.getController().setZoom(12); //SharedData data = SharedData.getInstance(); data.setAPIKEY("APIKEY"); data.setSrc_lat(17); data.setSrc_lng(78); data.setDest_lat(18); data.setDest_lng(77); startActivity(new Intent(RoutePath.this,RoutePath.class)); } } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } private class connectAsyncTask extends AsyncTask&lt;Void, Void, Void&gt;{ private ProgressDialog progressDialog; @Override protected void onPreExecute() { // TODO Auto-generated method stub super.onPreExecute(); progressDialog = new ProgressDialog(_activity); progressDialog.setMessage("Fetching route, Please wait..."); progressDialog.setIndeterminate(true); progressDialog.show(); } @Override protected Void doInBackground(Void... params) { // TODO Auto-generated method stub fetchData(); return null; } @Override protected void onPostExecute(Void result) { // TODO Auto-generated method stub super.onPostExecute(result); if(doc!=null){ Overlay ol = new MyOverlay(_activity,srcGeoPoint,srcGeoPoint,1); mOverlays.add(ol); NodeList _nodelist = doc.getElementsByTagName("status"); Node node1 = _nodelist.item(0); String _status1 = node1.getChildNodes().item(0).getNodeValue(); if(_status1.equalsIgnoreCase("OK")){ NodeList _nodelist_path = doc.getElementsByTagName("overview_polyline"); Node node_path = _nodelist_path.item(0); Element _status_path = (Element)node_path; NodeList _nodelist_destination_path = _status_path.getElementsByTagName("points"); Node _nodelist_dest = _nodelist_destination_path.item(0); String _path = _nodelist_dest.getChildNodes().item(0).getNodeValue(); List&lt;GeoPoint&gt; _geopoints = decodePoly(_path); GeoPoint gp1; GeoPoint gp2; gp2 = _geopoints.get(0); Log.d("_geopoints","::"+_geopoints.size()); for(int i=1;i&lt;_geopoints.size();i++) // the last one would be crash { gp1 = gp2; gp2 = _geopoints.get(i); Overlay ol1 = new MyOverlay(gp1,gp2,2,Color.BLUE); mOverlays.add(ol1); } Overlay ol2 = new MyOverlay(_activity,destGeoPoint,destGeoPoint,3); mOverlays.add(ol2); progressDialog.dismiss(); }else{ showAlert("Unable to find the route"); } Overlay ol2 = new MyOverlay(_activity,destGeoPoint,destGeoPoint,3); mOverlays.add(ol2); progressDialog.dismiss(); mapView.scrollBy(-1,-1); mapView.scrollBy(1,1); }else{ showAlert("Unable to find the route"); } } } Document doc = null; private void fetchData() { StringBuilder urlString = new StringBuilder(); urlString.append("http://maps.google.com/maps/api/directions/xml?origin="); urlString.append( Double.toString((double)srcGeoPoint.getLatitudeE6()/1.0E6 )); urlString.append(","); urlString.append( Double.toString((double)srcGeoPoint.getLongitudeE6()/1.0E6 )); urlString.append("&amp;destination=");//to urlString.append( Double.toString((double)destGeoPoint.getLatitudeE6()/1.0E6 )); urlString.append(","); urlString.append( Double.toString((double)destGeoPoint.getLongitudeE6()/1.0E6 )); urlString.append("&amp;sensor=true&amp;mode=driving"); Log.d("url","::"+urlString.toString()); 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 = (Document) db.parse(urlConnection.getInputStream());//Util.XMLfromString(response); }catch (MalformedURLException e){ e.printStackTrace(); }catch (IOException e){ e.printStackTrace(); }catch (ParserConfigurationException e){ e.printStackTrace(); } catch (SAXException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private List&lt;GeoPoint&gt; decodePoly(String encoded) { List&lt;GeoPoint&gt; poly = new ArrayList&lt;GeoPoint&gt;(); int index = 0, len = encoded.length(); int lat = 0, lng = 0; while (index &lt; len) { int b, shift = 0, result = 0; do { b = encoded.charAt(index++) - 63; result |= (b &amp; 0x1f) &lt;&lt; shift; shift += 5; } while (b &gt;= 0x20); int dlat = ((result &amp; 1) != 0 ? ~(result &gt;&gt; 1) : (result &gt;&gt; 1)); lat += dlat; shift = 0; result = 0; do { b = encoded.charAt(index++) - 63; result |= (b &amp; 0x1f) &lt;&lt; shift; shift += 5; } while (b &gt;= 0x20); int dlng = ((result &amp; 1) != 0 ? ~(result &gt;&gt; 1) : (result &gt;&gt; 1)); lng += dlng; GeoPoint p = new GeoPoint((int) (((double) lat / 1E5) * 1E6), (int) (((double) lng / 1E5) * 1E6)); poly.add(p); } return poly; } private void showAlert(String message){ AlertDialog.Builder alert = new AlertDialog.Builder(_activity); alert.setTitle("Error"); alert.setCancelable(false); alert.setMessage(message); alert.setPositiveButton("Ok",new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub } }); alert.show(); } private Drawable getDrawable(String fileName){ return Drawable.createFromStream(_activity.getClass().getClassLoader().getResourceAsStream(fileName), "pin"); } } </code></pre> <p>I created 3 more classes -SharedData.java, CustomItemizedOverlay.java , MyOverrlay.java. I am passing my API_KEY through SharedData.java.</p> <p><strong>Main.xml</strong> </p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" &gt; &lt;com.google.android.maps.MapView android:id="@+id/mapid" android:layout_width="fill_parent" android:layout_height="fill_parent" android:enabled="true" android:clickable="true" android:apiKey="APIKEY" /&gt; &lt;TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="@string/hello_world" tools:context=".RoutePath" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p><strong>AndroidManifest.xml</strong></p> <pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.path" android:versionCode="1" android:versionName="1.0" &gt; &lt;uses-sdk android:minSdkVersion="8" android:targetSdkVersion="15" /&gt; &lt;application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" &gt; &lt;uses-library android:name="com.google.android.maps"/&gt; &lt;activity android:name=".RoutePath" android:label="@string/title_activity_path" &gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;/application&gt; &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"&gt;&lt;/uses-permission&gt; &lt;uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"&gt;&lt;/uses-permission&gt; &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/&gt; &lt;uses-permission android:name="android.permission.INTERNET"&gt;&lt;/uses-permission&gt; &lt;/manifest&gt; </code></pre>
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