How to draw interactive Polyline on route google maps v2 android

Question

i have the following code which is drawing polylines for me and working fine  But the problem is that its not drawing interactive polylines  drawn lines are missing some pixels    import java io BufferedReader  import java io IOException  import java io InputStream  import java io InputStreamReader  import java io UnsupportedEncodingException  import java util ArrayList  import java util List   import org apache http HttpEntity  import org apache http HttpResponse  import org apache http client ClientProtocolException  import org apache http client methods HttpPost  import org apache http impl client DefaultHttpClient  import org json JSONArray  import org json JSONObject   import com google android gms maps CameraUpdateFactory  import com google android gms maps GoogleMap  import com google android gms maps SupportMapFragment  import com google android gms maps model BitmapDescriptorFactory  import com google android gms maps model LatLng  import com google android gms maps model MarkerOptions  import com google android gms maps model Polyline  import com google android gms maps model PolylineOptions   import android app ProgressDialog  import android content Context  import android graphics Color  import android os AsyncTask  import android os Bundle  import android support v4 app FragmentActivity  import android util Log  import android view View  import android view View OnClickListener  import android widget Button   public class testRoute extends FragmentActivity implements OnClickListener        private GoogleMap myMap      Polyline line      Context context          Static LatLng     LatLng startLatLng   new LatLng 30 707104  76 690749       LatLng endLatLng   new LatLng 30 721419  76 730017        public void onCreate Bundle bd            super onCreate bd           setContentView R layout passanger home call           context   testRoute this              Temp GetTrails Button         Button btntemp    Button  findViewById R id btn pass home call temp           btntemp setOnClickListener this               GoogleMap myMap         myMap     SupportMapFragment  getSupportFragmentManager                    findFragmentById R id map pass home call   getMap            myMap setMyLocationEnabled true           myMap moveCamera CameraUpdateFactory newLatLng startLatLng            myMap animateCamera CameraUpdateFactory zoomTo 12                Now auto clicking the button         btntemp performClick                Override     public void onClick View v             switch  v getId              case R id btn pass home call temp              String urlTopass   makeURL startLatLng latitude                      startLatLng longitude  endLatLng latitude                      endLatLng longitude               new connectAsyncTask urlTopass  execute                break           default              break                        private class connectAsyncTask extends AsyncTask lt Void  Void  String gt            private ProgressDialog progressDialog          String url           connectAsyncTask String urlPass                url   urlPass                      Override         protected void onPreExecute                    TODO Auto-generated method stub             super onPreExecute                progressDialog   new ProgressDialog context               progressDialog setMessage  Fetching route  Please wait                   progressDialog setIndeterminate true               progressDialog show                        Override         protected String doInBackground Void    params                JSONParser jParser   new JSONParser                String json   jParser getJSONFromUrl url               return json                      Override         protected void onPostExecute String result                super onPostExecute result               progressDialog hide                if  result    null                    drawPath result                                      public String makeURL double sourcelat  double sourcelog  double destlat              double destlog            StringBuilder urlString   new StringBuilder            urlString append  http   maps googleapis com maps api directions json            urlString append   origin       from         urlString append Double toString sourcelat            urlString append               urlString append Double toString sourcelog            urlString append   amp destination       to         urlString append Double toString destlat            urlString append               urlString append Double toString destlog            urlString append   amp sensor false amp mode driving amp alternatives true            return urlString toString               public class JSONParser            InputStream is   null          JSONObject jObj   null          String json                   constructor         public JSONParser                        public String getJSONFromUrl String url                    Making HTTP request             try                      defaultHttpClient                 DefaultHttpClient httpClient   new DefaultHttpClient                    HttpPost httpPost   new HttpPost url                    HttpResponse httpResponse   httpClient execute httpPost                   HttpEntity httpEntity   httpResponse getEntity                    is   httpEntity getContent                   catch  UnsupportedEncodingException e                    e printStackTrace                  catch  ClientProtocolException e                    e printStackTrace                  catch  IOException e                    e printStackTrace                              try                   BufferedReader reader   new BufferedReader                          new InputStreamReader is   iso-8859-1    8                   StringBuilder sb   new StringBuilder                    String line   null                  while   line   reader readLine       null                        sb append line     n                                       json   sb toString                    is close                  catch  Exception e                    Log e  Buffer Error    Error converting result     e toString                               return json                        public void drawPath String result            if  line    null                myMap clear                      myMap addMarker new MarkerOptions   position endLatLng  icon                  BitmapDescriptorFactory fromResource R drawable redpin marker             myMap addMarker new MarkerOptions   position startLatLng  icon                  BitmapDescriptorFactory fromResource R drawable redpin marker             try                  Tranform the string into a json object             final JSONObject json   new JSONObject result               JSONArray routeArray   json getJSONArray  routes                JSONObject routes   routeArray getJSONObject 0               JSONObject overviewPolylines   routes                      getJSONObject  overview polyline                String encodedString   overviewPolylines getString  points                List lt LatLng gt  list   decodePoly encodedString                for  int z   0  z  lt  list size   - 1  z                      LatLng src   list get z                   LatLng dest   list get z   1                   line   myMap addPolyline new PolylineOptions                            add new LatLng src latitude  src longitude                                   new LatLng dest latitude  dest longitude                            width 5  color Color BLUE  geodesic true                             catch  Exception e                e printStackTrace                         private List lt LatLng gt  decodePoly String encoded             List lt LatLng gt  poly   new ArrayList lt LatLng 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               LatLng p   new LatLng    double  lat   1E5                           double  lng   1E5                 poly add p                      return poly            Code is Working fine And Drawing Route from one place to another  but not drawing the interactive Routes   Screent Shot  -    I think problem is with my drawPath   method     public void drawPath String result            if  line    null                myMap clear                      myMap addMarker new MarkerOptions   position endLatLng  icon                  BitmapDescriptorFactory fromResource R drawable redpin marker             myMap addMarker new MarkerOptions   position startLatLng  icon                  BitmapDescriptorFactory fromResource R drawable redpin marker             try                  Tranform the string into a json object             final JSONObject json   new JSONObject result               JSONArray routeArray   json getJSONArray  routes                JSONObject routes   routeArray getJSONObject 0               JSONObject overviewPolylines   routes                      getJSONObject  overview polyline                String encodedString   overviewPolylines getString  points                List lt LatLng gt  list   decodePoly encodedString                for  int z   0  z  lt  list size   - 1  z                      LatLng src   list get z                   LatLng dest   list get z   1                   line   myMap addPolyline new PolylineOptions                            add new LatLng src latitude  src longitude                                   new LatLng dest latitude  dest longitude                            width 5  color Color BLUE  geodesic true                             catch  Exception e                e printStackTrace                      Ignore The markers just suggest me about adding interactive polyline

User · Answer

You can use this method to draw polyline on googleMap

// Draw polyline on map
public void drawPolyLineOnMap(List<LatLng> list) {
    PolylineOptions polyOptions = new PolylineOptions();
    polyOptions.color(Color.RED);
    polyOptions.width(5);
    polyOptions.addAll(list);

    googleMap.clear();
    googleMap.addPolyline(polyOptions);

    LatLngBounds.Builder builder = new LatLngBounds.Builder();
    for (LatLng latLng : list) {
        builder.include(latLng);
    }

    final LatLngBounds bounds = builder.build();

    //BOUND_PADDING is an int to specify padding of bound.. try 100.
    CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, BOUND_PADDING);
    googleMap.animateCamera(cu);
}

You need to add this line in your gradle in case you haven't.

compile 'com.google.android.gms:play-services-maps:8.4.0'

User · Answer

You should use options addAll allPoints   instead of options add point

User · Answer

I ve created a couple of map tutorials that will cover what you need  Animating the map describes howto create polylines based on a set of LatLngs  Using Google APIs on your map   Directions and Places describes howto use the Directions API and animate a marker along the path   Take a look at these 2 tutorials and the Github project containing the sample app   It contains some tips to make your code cleaner and more efficient    Using Google HTTP Library for more efficient API access and easy JSON handling  Using google-map-utils library for maps-related functions  like decoding the polylines  Animating markers

User · Answer

Using the google maps projection api to draw the polylines on an overlay view enables us to do a lot of things  Check this repo that has an example

User · Answer

Instead of creating too many short Polylines just create one like here   PolylineOptions options   new PolylineOptions   width 5  color Color BLUE  geodesic true   for  int z   0  z  lt  list size    z          LatLng point   list get z       options add point     line   myMap addPolyline options     I m also not sure you should use geodesic when your points are so close to each other

[android] How to draw interactive Polyline on route google maps v2 android

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