我想要做的反向地理编码在我的应用程序中使用的地图API 2.But我不知道到底该怎么做？任何想法？
Answer 1:
使用地理编码 ：
Geocoder geoCoder = new Geocoder(context);
List<Address> matches = geoCoder.getFromLocation(latitude, longitude, 1);
Address bestMatch = (matches.isEmpty() ? null : matches.get(0));
Answer 2:
你可以做反向地理编码两种方式
- 地理编码
- 谷歌API
地理编码器应该在一个单独的线程中执行：
private class FindPlaces extends AsyncTask<String, Void, List<Address>> {
@Override
protected List<Address> doInBackground(String... params) {
if (act == null)
this.cancel(true);
Geocoder geocoder = new Geocoder(act, Locale.getDefault());
try {
addresses = geocoder.getFromLocation(
Double.parseDouble(params[0]),
Double.parseDouble(params[1]), result);
} catch (IOException e) {
e.printStackTrace();
}
return addresses;
}
@Override
protected void onPostExecute(List<Address> addresses) {
super.onPostExecute(addresses);
if (act == null)
return;
if (addresses == null || addresses.size() == 0) {
Toast.makeText(act, "No location found", Toast.LENGTH_SHORT)
.show();
return;
}
address = addresses.get(0);
String aLine = "";
for (int addr = 0; addr <= address.getMaxAddressLineIndex() - 2; addr++) {
aLine = aLine.length() > 0 ? aLine + ", "
+ String.valueOf(address.getAddressLine(addr)) : String
.valueOf(address.getAddressLine(addr));
}
address.setAddressLine(0, aLine);
if (act == null)
return;
}
}
谷歌API 1）启用谷歌的控制台2）谷歌地图API地理编码的串联在经纬度这个网址https://maps.googleapis.com/maps/api/geocode/json?latlng=
例如： https://maps.googleapis.com/maps/api/geocode/json?latlng=youlatitude,yourlongitude&key=yourapikey
调用下面asyntask与latlog这对我的作品..
public class ReverseGecoding extends AsyncTask<Double, Void, String> {
Context context;**
private Address address;
private String GEOCODINGKEY = "&key=YourKey";
private String REVERSE_GEOCODING_URL = "https://maps.googleapis.com/maps/api/geocode/json?latlng=";
public ReverseGecoding(Context context) {
this.context = context;
this.listener = listener;
}
@Override
protected String doInBackground(Double... params) {
if (params[0] != null) {
String result = "";
try {
String mUrl = REVERSE_GEOCODING_URL + params[0] + ","
+ params[1] + GEOCODINGKEY;
URL url = new URL(mUrl);
HttpURLConnection httpsURLConnection = (HttpURLConnection) url.openConnection();
httpsURLConnection.setReadTimeout(10000);
httpsURLConnection.setConnectTimeout(15000);
httpsURLConnection.setDoInput(true);
httpsURLConnection.setRequestMethod("GET");
httpsURLConnection.connect();
int mStatus = httpsURLConnection.getResponseCode();
if (mStatus == 200)
return readResponse(httpsURLConnection.getInputStream()).toString();
return result;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
private static StringBuilder readResponse(InputStream inputStream) throws IOException, NullPointerException {
BufferedReader r = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder stringBuilder = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
stringBuilder.append(line);
}
return stringBuilder;
}
}
Answer 3:
这是它如何工作的我..
MarkerOptions markerOptions;
Location myLocation;
Button btLocInfo;
String selectedLocAddress;
private GoogleMap myMap;
LatLng latLng;
LatLng tmpLatLng;
@Override
public void onMapLongClick(LatLng point) {
// Getting the Latitude and Longitude of the touched location
latLng = point;
// Clears the previously touched position
myMap.clear();
// Animating to the touched position
myMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
// Creating a marker
markerOptions = new MarkerOptions();
// Setting the position for the marker
markerOptions.position(latLng);
// Adding Marker on the touched location with address
new ReverseGeocodingTask(getBaseContext()).execute(latLng);
//tmpLatLng = latLng;
btLocInfo.setEnabled(true);
btLocInfo.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
double[] coordinates={tmpLatLng.latitude/1E6,tmpLatLng.longitude/1E6};
double latitude = tmpLatLng.latitude;
double longitude = tmpLatLng.longitude;
Log.i("selectedCoordinates", latitude + " " + longitude);
Log.i("selectedLocAddress", selectedLocAddress);
}
});
}
private class ReverseGeocodingTask extends AsyncTask<LatLng, Void, String>{
Context mContext;
public ReverseGeocodingTask(Context context){
super();
mContext = context;
}
// Finding address using reverse geocoding
@Override
protected String doInBackground(LatLng... params) {
Geocoder geocoder = new Geocoder(mContext);
double latitude = params[0].latitude;
double longitude = params[0].longitude;
List<Address> addresses = null;
String addressText="";
try {
addresses = geocoder.getFromLocation(latitude, longitude,1);
Thread.sleep(500);
if(addresses != null && addresses.size() > 0 ){
Address address = addresses.get(0);
addressText = String.format("%s, %s, %s",
address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "",
address.getLocality(),
address.getCountryName());
}
}
catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
selectedLocAddress = addressText;
return addressText;
}
@Override
protected void onPostExecute(String addressText) {
// Setting the title for the marker.
// This will be displayed on taping the marker
markerOptions.title(addressText);
// Placing a marker on the touched position
myMap.addMarker(markerOptions);
}
}
Answer 4:
你可以这样做，以便获得完整地址：
public class MainActivity extends AppCompatActivity {
...
private Geocoder geocoder;
private TextView mAddressTxtVu;
...
// I assume that you got latitude and longitude correctly
mLatitude = 20.23232
mLongitude = 32.999
String errorMessage = "";
geocoder = new Geocoder(context, Locale.getDefault());
List<Address> addresses = null;
try {
addresses = geocoder.getFromLocation(
mlattitude,
mlongitude,
1);
} catch (IOException e) {
errorMessage = getString(R.string.service_not_available);
Log.e(TAG, errorMessage, e);
} catch (IllegalArgumentException illegalArgumentException) {
// Catch invalid latitude or longitude values.
errorMessage = getString(R.string.invalid_lat_long_used);
Log.e(TAG, errorMessage + ". " + "Latitude = " + mlattitude +",
Longitude = " + mlongitude, illegalArgumentException);
}
// Handle case where no address was found.
if (addresses == null || addresses.size() == 0) {
if (errorMessage.isEmpty()) {
errorMessage = getString(R.string.no_address_found);
Log.e(TAG, errorMessage);
}
} else {
Address address = addresses.get(0);
ArrayList<String> addressFragments = new ArrayList<String>();
// Fetch the address lines using getAddressLine,
// join them, and send them to the thread.
for (int i = 0; i <= address.getMaxAddressLineIndex(); i++) {
addressFragments.add(address.getAddressLine(i));
}
// Log.i(TAG, getString(R.string.address_found));
mAddressTxtVu.setText(TextUtils.join(System.getProperty("line.separator"),
addressFragments));
}
希望能帮助到你！
Answer 5:
你并不需要使用谷歌地图API用于此目的。 Android的SKD有一个类吧，你可以简单地没有API密钥的任何注册等上使用。 类是android.location.Geocoder 。 它有地理编码和反向地理编码方法。 我一直在寻找在这个类的源代码，发现它有一个方法android.location.Geocoder#getFromLocationName(java.lang.String, int)其中第一个参数是地址，第二个是你想要的结果的最大数量。 它返回一个List<Address> 。 该Address类有类似的方法android.location.Address#getLatitude和android.location.Address#getLongitude 。 他们都返回double 。
试试吧，让我知道这是:-)有多好
文章来源: How to reverse Geocode in google maps api 2 android
