问题
i am trying to draw polyline for googlemap, it is working fine upto android version 4.4(kitkat) but it is not working in android 5.0(lollipop). what to do for working in lollipop also. could you please help me hoe to resolve this issues this is my google map code
public class MapLocation extends FragmentActivity implements OnMarkerClickListener {
GoogleMap map;
ArrayList<LatLng> markerPoints;
LatLng origin,dest1,dest2,dest3;
Marker marker1,marker2,marker3;
PolylineOptions lineOptions = new PolylineOptions();
Polyline line ;
int pos;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.gmap_direction);
markerPoints = new ArrayList<LatLng>();
// Getting reference to SupportMapFragment of the activity_main
SupportMapFragment fm = (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map);
// Getting Map for the SupportMapFragment
map = fm.getMap();
if(map!=null){
// Enable MyLocation Button in the Map
map.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location
Location location = locationManager.getLastKnownLocation(provider);
pos = getIntent().getIntExtra("pos",0);
try{
switch (pos) {
case 1:
dest2 = new LatLng(18.545981, 73.902132);
marker2 = map.addMarker(new MarkerOptions().position(dest2).title("Vivero International Preschool").snippet("PUNE,KALYANINAGAR").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
break;
case 2:
dest2 = new LatLng(17.429122, 78.412745);
marker2 = map.addMarker(new MarkerOptions().position(dest2).title("Vivero International Preschool").snippet("Jubilee Hills").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
break;
case 3:
dest2 = new LatLng(19.115177, 72.909486);
marker2 = map.addMarker(new MarkerOptions().position(dest2).title("Vivero International Preschool").snippet("MUMBAI, POWAI").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
break;
case 4:
dest2 = new LatLng(18.545981, 73.902132);
marker2 = map.addMarker(new MarkerOptions().position(dest2).title("Vivero International Preschool").snippet("PUNE,MAGARPATTA").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
break;
case 5:
dest2 = new LatLng(12.924438, 77.631537);
marker2 = map.addMarker(new MarkerOptions().position(dest2).title("Vivero International Preschool").snippet("Koramangala").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
break;
case 6:
dest2 = new LatLng(12.9044019,77.6690773);
marker2 = map.addMarker(new MarkerOptions().position(dest2).title("Vivero International Preschool").snippet("Sarjapur").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
break;
case 7:
dest2 = new LatLng(12.972442, 77.639195);
marker2 = map.addMarker(new MarkerOptions().position(dest2).title("Vivero International Preschool").snippet("Indiranagar").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
break;
case 8:
dest2 = new LatLng(12.968719, 77.747883);
marker2 = map.addMarker(new MarkerOptions().position(dest2).title("Vivero International Preschool").snippet("Whitefield").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
break;
// dest1 = new LatLng(19.115177, 72.909486);
}
// Showing the current location in Google Map
map.moveCamera(CameraUpdateFactory.newLatLng(dest2));
// Zoom in the Google Map
map.animateCamera(CameraUpdateFactory.zoomTo(15));
marker2.showInfoWindow();
if(location!=null){
onLocationChanged(location);
String url = getDirectionsUrl(origin, dest2);
DownloadTask downloadTask = new DownloadTask();
// Start downloading json data from Google Directions API
downloadTask.execute(url);
}
}
catch(Exception e){
}
}
}
/** A class to parse the Google Places in JSON format */
private class ParserTask extends AsyncTask<String, Integer, List<List<HashMap<String,String>>> >{
// Parsing the data in non-ui thread
@Override
protected List<List<HashMap<String, String>>> doInBackground(String... jsonData) {
JSONObject jObject;
List<List<HashMap<String, String>>> routes = null;
try{
jObject = new JSONObject(jsonData[0]);
DirectionsJSONParser parser = new DirectionsJSONParser();
// Starts parsing data
routes = parser.parse(jObject);
}catch(Exception e){
e.printStackTrace();
}
return routes;
}
// Executes in UI thread, after the parsing process
@Override
protected void onPostExecute(List<List<HashMap<String, String>>> result) {
ArrayList<LatLng> points = null;
//PolylineOptions lineOptions = null;
MarkerOptions markerOptions = new MarkerOptions();
// Traversing through all the routes
for(int i=0;i<result.size();i++){
points = new ArrayList<LatLng>();
//lineOptions = new PolylineOptions();
// Fetching i-th route
List<HashMap<String, String>> path = result.get(i);
// Fetching all the points in i-th route
for(int j=0;j<path.size();j++){
HashMap<String,String> point = path.get(j);
double lat = Double.parseDouble(point.get("lat"));
double lng = Double.parseDouble(point.get("lng"));
LatLng position = new LatLng(lat, lng);
points.add(position);
}
// Adding all the points in the route to LineOptions
lineOptions.addAll(points);
lineOptions.width(4);
lineOptions.color(Color.BLUE);
}
// Drawing polyline in the Google Map for the i-th route
//map.addPolyline(lineOptions);
line = map.addPolyline(lineOptions);
}
}
}
回答1:
Try the modified codes for your onPostExecute:
@Override
protected void onPostExecute(List<List<HashMap<String, String>>> result) {
ArrayList<LatLng> points = null;
//PolylineOptions lineOptions = null;
//MarkerOptions markerOptions = new MarkerOptions();
points = new ArrayList<LatLng>();
// Traversing through all the routes
for(int i=0;i<result.size();i++){
//points = new ArrayList<LatLng>();
//lineOptions = new PolylineOptions();
// Fetching i-th route
List<HashMap<String, String>> path = result.get(i);
// Fetching all the points in i-th route
for(int j=0;j<path.size();j++){
HashMap<String,String> point = path.get(j);
double lat = Double.parseDouble(point.get("lat"));
double lng = Double.parseDouble(point.get("lng"));
LatLng position = new LatLng(lat, lng);
points.add(position);
}
// Adding all the points in the route to LineOptions
//lineOptions.addAll(points);
//lineOptions.width(4);
//lineOptions.color(Color.BLUE);
}
// Drawing polyline in the Google Map for the i-th route
//map.addPolyline(lineOptions);
lineOptions.addAll(points);
lineOptions.width(4);
lineOptions.color(Color.BLUE);
line = map.addPolyline(lineOptions);
}
I moved your list points instance before for loop, and also lineOptions after for loop.
Hope this help.
回答2:
Now Again Google has released a new API but they haven't updated the documentation properly.To connect to the API, you need to create an instance of the Google Play services API client.
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
Once you have connected to Google Play services and the location services API, you can get the last known location of a user's device. When your app is connected to these you can use the fused location provider's getLastLocation() method to retrieve the device location. To do this you have to implements this interfaces in your Class/Activity
implements
ConnectionCallbacks, OnConnectionFailedListener
Then you can found this implemented methods
@Override
public void onConnected(Bundle bundle) {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
}
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
Here is my complete code into this thread . Documentation is here
来源：https://stackoverflow.com/questions/28668610/google-map-polyline-is-not-working-on-android-version-5-0lollipop