尝试从附近的地点列表中读取数据并将其设置为在地图上显示时出错

问题描述

在尝试从附近的地点列表中读取数据并将其设置为在地图上显示时遇到此错误。 您可以从随附的照片中看到错误。 enter image description here

公共类GetNearbyPlaceData扩展了AsyncTask

String googlePlaceData;
GoogleMap mMap;
String url;

@Override
protected String doInBackground(Object... objects) {

    mMap = (GoogleMap)objects[0];
    url = (String)objects[1];
    DownloadUrl downloadUrl = new DownloadUrl();
    try {
        googlePlaceData = downloadUrl.readUrl(url);
        Log.d("url in get nearby",googlePlaceData);
    } catch (IOException e) {
        e.printstacktrace();
    }
    return  googlePlaceData;


}

@Override
protected void onPostExecute(String s) {

    List<HashMap<String,String>> nearbyPlaceList = null;
    DataParser parser = new DataParser();
    nearbyPlaceList = parser.parse(s);
    showNearbyPlaces(nearbyPlaceList);
}

private void showNearbyPlaces(List<HashMap<String,String>> nearbyPlaceList)
{
    for (int i = 0; i<nearbyPlaceList.size();i++)
    {
        MarkerOptions markerOptions = new MarkerOptions();
        HashMap<String,String > googlePlace = nearbyPlaceList.get(i);

        String placeName = googlePlace.get("place_name");
                Log.d("placeName",placeName);
        String vicinity = googlePlace.get("vicinity");
        double lat = Double.parseDouble( googlePlace.get("lat"));
        double lng = Double.parseDouble( googlePlace.get("lng"));
        Log.d("lat",Double.toString(lat));
        Log.d("lat",Double.toString(lng));
        LatLng latLng = new LatLng(lat,lng);
        markerOptions.position(latLng);
        markerOptions.title(placeName+":"+vicinity);
        markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE));
        mMap.addMarker(markerOptions);


        mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        mMap.animateCamera(CameraUpdateFactory.zoomTo(10));

       }
   }
}

解决方法

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