Question

您好我目前在Android中使用Google地图。我从mysql数据库中检索了纬度，经度和片段值的列表，并尝试在Google地图中显示它。这是我现在尝试的代码，但我没有在地图中找到标记，

public static ArrayList<HashMap<String,Double>> vehiclehistory1= new ArrayList<HashMap<String,Double>>();
double latitude;
double longitude;
for(int i=0;i<user.length();i++)
{
    System.out.println("forloop i valuie"+i);
    JSONObject c1 = user.getJSONObject(i);
    JSONObject c2 = c1.getJSONObject(TAG_SRES);

    vehicle_reg_numb = c2.getString(TAG_Vechicle_REG);
    latitude= c2.getDouble(TAG_Latitude);
    longitude = c2.getDouble(TAG_Longitude);
    speed = c2.getString(TAG_Speed);
    exceed_speed_limit=c2.getString(TAG_Exceed_Speed);
    bus_tracking_timestamp = c2.getString(TAG_bus_tracking_timestamp);
    address=c2.getString(TAG_address);
    map1.put(TAG_Latitude,latitude);
    map1.put(TAG_Longitude,longitude);
    map.put(TAG_Speed, speed);
    map.put(TAG_address, address);

    vehiclehistory1.add(map1);
    vehiclehistory.add(map);

}
@Override
protected void onPostExecute(String file_url) {

    super.onPostExecute(file_url);
    cDialog.dismiss();
    for (int i = 0; i < vehiclehistory1.size(); i++) {
        LatLng pinLocation = new LatLng(Float.parseFloat(vehiclehistory1.get(i).latitude), Float.parseFloat(vehiclehistory1.get(i).longitude));
        Marker storeMarker = map.addMarker(new MarkerOptions()
            .position(pinLocation)
            .title(vehiclehistory1.get(i).pinname)
            .snippet(vehiclehistory1.get(i).address)
        );
    }
}

我得到的纬度是未解决的类型。任何人都可以告诉我我错在哪里？

Answer 1

试试这种方式

  LatLng pinLocation = new LatLng(Double.parseDouble(vehiclehistory1.get(i).latitude), Double.parseDouble(vehiclehistory1.get(i).longitude));

而不是Parse Float使用Double Latitude和Longitude

Google Maps从asynctask加载多个标记

1 个答案: