在我的应用程序中，当用户插入数据时，我想捕获用户的确切位置。我尝试了很多方法。但他们都没有显示出确切的位置。 （我的意思是它们只显示国家和管理区域的详细信息。我使用了getLocality和getFeatureName。如果在该纬度和经度上没有找到Locality或Featurename，那么它将返回一个空值）。我的代码是
Geocoder coder=new Geocoder(MainActivity.mContext,Locale.getDefault());
try
{
List<Address> listaddress=coder.getFromLocation(lat, lon, 1);
Address obj=listaddress.get(0);
String add=obj.getAddressLine(0);
add = add+"\n"+obj.getLatitude();
add = add+","+obj.getLongitude();
add = add + "," + obj.getCountryName();
add = add + "," + obj.getAdminArea();
add = add + "\n" + obj.getPostalCode();//null
add = add + "," + obj.getSubAdminArea();
add = add +","+obj.getFeatureName();//null
add = add+ "," +obj.getPremises();//null
add = add + "\n" + obj.getLocality();//null
add = add + "," + obj.getSubThoroughfare();//null
add = add+ "," +obj.getSubLocality();//null
add = add+"\n"+obj.getThoroughfare();
Log.v("IGA", "Address" + add);
//Toast.makeText(this, "Address=>" + add,Toast.LENGTH_SHORT).show();
t.setText(" "+add);
}
所以我不知道如何解决它。但我有一个想法。我需要找到最接近我确切纬度和经度值的地方，以便我可以使用那个地方。但我不知道如何找到最近的地方（最近的地方意味着村庄或街道，而不是其他任何地方）。
此外，在Android手机中，有一个应用程序“Places”就在那里。它显示了关于我在哪里的正确区域。是否有可能使用应用程序“位置”来查找我的确切或最近的区域。 （我需要最近的村庄或街道，而不是subAdminArea（州）。如果是，请解释。
任何人都可以帮助我
答案 0 :(得分：0)
使用谷歌反向地理编码API，你可以通过给出纬度和经度值来获得你的实际街道地址。
Get Lat & Lan through GPS Receiver in Android
然后拨打google reverse geocoding api top fecth实际的街道地址：
MapManager in = new MapManager(
"http://maps.google.com/maps/geo?output=xml&oe=utf-8&ll="
+ lattitude + "%2C"
+ lantitude + "&key=get-key-from-google-map-api");
content = in.URLRequest();
System.out.println("Addrss:"+in.parseMapData(content));
Class MapManager{
String url ="";
MapManager(String url){
this.url = url;
}
public String parseMapData(String data) {
String addr = "";
try {
InputStream in = new ByteArrayInputStream(data.getBytes());
DocumentBuilder builder = DocumentBuilderFactory.newInstance()
.newDocumentBuilder();
Document doc = builder.parse(in, null);
NodeList address = doc.getElementsByTagName("address");
addr = address.item(0).getTextContent();
} catch (Throwable t) {
Log.v("Exception", "Exception: " + t.toString());
}
return addr;
}
public String URLRequest() {
httpclient = new DefaultHttpClient();
try {
httpget = new HttpGet(url);
httpresponse = httpclient.execute(httpget);
httpentity = httpresponse.getEntity();
response = EntityUtils.toString(httpentity);
response = response.trim();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
IsServerConn = false;
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (Exception e) {
IsServerConn = false;
}
return response;
}
}
答案 1 :(得分：0)
private class MatchingNearByLocationTask extends
AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
progressDialog = new ProgressDialog(getContext());
progressDialog.setMessage("Loading...");
progressDialog.setCancelable(true);
progressDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
jsonStr = getLocationInfo(latitude, longitude).toString(); // put longitude and latitude value from which u want find nearer palce
if (jsonStr != null) {
Log.i("location--??", jsonStr);
JSONObject jsonObj;
try {
jsonObj = new JSONObject(jsonStr);
JSONObject responseJsonObject = jsonObj
.getJSONObject("response");
JSONArray venues = responseJsonObject
.getJSONArray(("venues"));
for (int index = 0; index < venues.length(); index++) {
locationObject = new NearByLocationObject();
String id = "", name = "", longitude = "", latitude = "";
JSONObject venuesJsonObj = venues.getJSONObject(index);
id = venuesJsonObj.getString("id");
name = venuesJsonObj.getString("name");
JSONObject latLngJsonObj = venuesJsonObj
.getJSONObject("location");
longitude = latLngJsonObj.getString("lng");
latitude = latLngJsonObj.getString("lat");
locationObject.setId(id);
locationObject.setNameOfLocation(name);
locationObject.setLocationOfLatitude(latitude);
locationObject.setLocationOfLongitude(longitude);
nearByLocationArrayList.add(locationObject);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (progressDialog.isShowing()) {
progressDialog.dismiss();
}
adapter = new NearByLocationArrayAdapter(getContext(),
R.layout.nearby_location_item, nearByLocationArrayList);
nearByLocationListView.setAdapter(adapter);
}
@Override
protected void onCancelled() {
super.onCancelled();
progressDialog.dismiss();
}
}
private JSONObject getLocationInfo(double lat, double lng) {
HttpGet httpGet = new HttpGet(
"https://api.foursquare.com/v2/venues/search?ll="
+ lat
+ ","
+ lng
+ "&radius=100&oauth_token=TNFKWLITLCJYWPSLAXQNHCSDPHZ4IS5PWVDD45OI224JGFFM&v=20140407&intent=checkin");
HttpClient client = new DefaultHttpClient();
HttpResponse response;
StringBuilder stringBuilder = new StringBuilder();
try {
response = client.execute(httpGet);
HttpEntity entity = response.getEntity();
InputStream stream = entity.getContent();
int b;
while ((b = stream.read()) != -1) {
stringBuilder.append((char) b);
}
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
JSONObject jsonObject = new JSONObject();
try {
jsonObject = new JSONObject(stringBuilder.toString());
} catch (JSONException e) {
e.printStackTrace();
}
return jsonObject;
}
public class NearByLocationObject {
String id = "", nameOfLocation, locationOfLatitude, LocationOfLongitude;
public NearByLocationObject() {
super();
// TODO Auto-generated constructor stub
}
public NearByLocationObject(String id, String nameOfLocation,
String locationOfLatitude, String locationOfLongitude) {
super();
this.id = id;
this.nameOfLocation = nameOfLocation;
this.locationOfLatitude = locationOfLatitude;
LocationOfLongitude = locationOfLongitude;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getNameOfLocation() {
return nameOfLocation;
}
public void setNameOfLocation(String nameOfLocation) {
this.nameOfLocation = nameOfLocation;
}
public String getLocationOfLatitude() {
return locationOfLatitude;
}
public void setLocationOfLatitude(String locationOfLatitude) {
this.locationOfLatitude = locationOfLatitude;
}
public String getLocationOfLongitude() {
return LocationOfLongitude;
}
public void setLocationOfLongitude(String locationOfLongitude) {
LocationOfLongitude = locationOfLongitude;
}
}