Question

我有另一个活动的地址列表（不是Lat，Lng）。现在我想通过Intent extras将这些地址传递给我的MapActivity并对其进行地理编码。我怎样才能做到这一点？

以下是我的Listview活动中的地址数据

{{1}}

Answer 1

Pass your data to activity using list or map and use following code to get the lat long from address

public void getLocationFromAddress(String strAddress){

   Geocoder coder = new Geocoder(this);
   List<Address> address;
   GeoPoint p1 = null;

   try {
        address = coder.getFromLocationName(strAddress,5);
        if (address==null) {
        return null;
    }
    Address location=address.get(0);
    location.getLatitude();
    location.getLongitude();

    Log.i("TAG","Lat = "+location.getLatitude())
    Log.i("TAG","Long = "+location.getLongitude())
    }
}

Also Check This Geocoding Example

Answer 2

  public class GeoData {
        private String address,lat,lng;
        public GeoData() {
             this("", "0", "0");
        }

    public GeoData(String address, String lat, String lng) {
        this.address = address;
        this.lat = lat;
        this.lng = lng;
    }
    public String getAddress() {
        return address;
    }

    public String getLat() {
        return lat;
    }

    public String getLng() {
        return lng;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public void setLat(String lat) {
        this.lat = lat;
    }

    public void setLng(String lng) {
        this.lng = lng;
    }
}

在您的活动中创建以下方法。

private GeoData getAddresesFronJson(JSONObject jsonObj) {
    if (jsonObj == null) {
        return null;
    }
    try {
        // Create a JSON object hierarchy from the results
        JSONArray resultJsonArray = jsonObj.getJSONArray("results");

        // Extract the Place descriptions from the results
        ArrayList<GeoData> resultList = new ArrayList<GeoData>(
                resultJsonArray.length());
        JSONObject locationObject = null;
        for (int i = 0; i < resultJsonArray.length(); i++) {
            GeoData data = new GeoData();
            data.setAddress(resultJsonArray.getJSONObject(i).getString(
                    "formatted_address"));
            locationObject = resultJsonArray.getJSONObject(i)
                    .getJSONObject("geometry").getJSONObject("location");

            data.setLat(locationObject.getString("lat"));

            data.setLng(locationObject.getString("lng"));

            return data;
        }

    } catch (JSONException e) {
        Log.e("JSONObject", "Cannot process JSON results", e);
    }
    return null;
}




private void computeAddress(String address) {
    address = address.replaceAll(" ", "%20");
    String apiKey = "YOUR PROJECT API KEY(Genarate from google console))";
    String url = "https://maps.googleapis.com/maps/api/geocode/json?address="
            + address + "&key=" + apiKey;
    // Log.i("googleapis--url:", url.toString());

    final JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Method.GET, url, null,
            new com.android.volley.Response.Listener<JSONObject>() {

                @Override
                public void onResponse(JSONObject jsonObject) {
                    GeoData geoData = getAddresesFronJson(jsonObject);
                    if (geoData == null) {
                        return;
                    }
                    // Use this geoData object
                }

            }, new com.android.volley.Response.ErrorListener() {

                @Override
                public void onErrorResponse(VolleyError volleyError) {

                }
            });
}

只需使用computeAddress（String address）方法获取Geocode对象。通过使用地理编码，您可以在地图中显示地址标记。

将地址的ArrayList传递给MapActivity以显示多个位置到地图（android）

2 个答案: