我正在尝试使用lat，lng来获取地址 但它没有工作粘贴下面的代码。 我真的很感激任何帮助 我一直都处于异常状态而不是错误的价值吗？
先谢谢。
googleMap.setOnMapClickListener((OnMapClickListener) new OnMapClickListener() {
@Override
public void onMapClick(LatLng point) {
// TODO Auto-generated method stub
final LatLng pt = point;
marker2 = googleMap.addMarker(new MarkerOptions()
.position(pt)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)));
final ProgressDialog progressDialog = ProgressDialog.show(
MainActivity.this,
"Searching Location....", "Please wait....");
new Thread(new Runnable(){
public void run(){
try {
Toast.makeText(getBaseContext(), GeocoderUtil.getAddress(marker2.getPosition(), MainActivity.this), 5).show();
}catch(Exception e)
{
runOnUiThread(new Runnable() {
public void run() {
progressDialog.dismiss();
Toast.makeText(getBaseContext(),"error.", 5).show();
}
});
}}}
).start();
例外：
FATAL EXCEPTION: main
java.lang.NullPointerException
at com.maps.maps.MainActivity$1.onMapClick(MainActivity.java:442)
at com.google.android.gms.maps.GoogleMap$.onMapClick(Unknown Source)
at com.google.android.gms.maps.internal.h$a.onTransact(Unknown Source)
at android.os.Binder.transact(Binder.java:297)
at bor.a(SourceFile:93)
at maps.af.q.b(Unknown Source)
at maps.ap.bo.b(Unknown Source)
at maps.ap.bk.onSingleTapConfirmed(Unknown Source)
at maps.bt.g.onSingleTapConfirmed(Unknown Source)
at maps.bt.i.handleMessage(Unknown Source)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4945)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：10)
ADDRESS ::来自地图V2的LAT N长期：
String address = "";
Geocoder geoCoder = new Geocoder( getBaseContext(), Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocation(latitude ,longitude , 1);
if (addresses.size() > 0)
{
for (int index = 0;
index < addresses.get(0).getMaxAddressLineIndex(); index++)
address += addresses.get(0).getAddressLine(index) + " "; }
}
catch (IOException e) {
e.printStackTrace();
}
googleMap_v2.animateCamera(CameraUpdateFactory.zoomTo(15));
current_location.setText("Latitude:" + latitude + ", Longitude:"+ longitude );
current_address.setText("current Address :" + address );
googleMap_v2.addMarker(new MarkerOptions().position(new LatLng(latitude, longitude)).title("current status"));
}}
答案 1 :(得分：3)
请按照以下代码获取地址：
final TextView address = (TextView) infoWindow.findViewById(R.id.Address);
address.setText(GeoCoderUtil.getAddress(marker.getPosition(), CurrentActivity.this));
GeoCoderUtil.java:
import java.io.IOException;
import java.text.DecimalFormat;
import java.util.List;
import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.util.Log;
import android.widget.Toast;
import com.google.android.gms.maps.model.LatLng;
public class GeoCoderUtil {
public static String getAddress(LatLng latLng, Context context) {
Geocoder geocoder = new Geocoder(context);
double latitude = latLng.latitude;
double longitude = latLng.longitude;
String address = "";
try {
Log.i("Address Info","Address based opn geocoder");
List<Address> addresses = geocoder.getFromLocation(latitude,
longitude, 1);
if (addresses != null && !addresses.isEmpty()) {
Address returnedAddress = addresses.get(0);
StringBuilder strReturnedAddress = new StringBuilder();
int addressLineIndex = returnedAddress.getMaxAddressLineIndex();
int addressLinesToShow = 2;
// To get address in limited lines
if (addressLineIndex < 2) {
addressLinesToShow = addressLineIndex;
}
for (int p = 0; p < addressLinesToShow; p++) {
strReturnedAddress
.append(returnedAddress.getAddressLine(p)).append(
"\n");
}
address = strReturnedAddress.toString();
} else {
address = "Address not available";
}
} catch (IOException e) {
e.printStackTrace();
address = "Address not available";
Log.e("Address not found","Unable to get Address in info window");
}
return address;
}
public static String getDistanceByUnit(double startLatitude, double startLongitude, double endLatitude, double endLongitude) {
float[] distance = new float[1];
Log.i("Distance","Distance from source to end");
Location.distanceBetween(startLatitude, startLongitude, endLatitude,
endLongitude, distance);
String distanceByUnit = "Not Available";
DecimalFormat d = new DecimalFormat("0.00");
if (distance[0] > 999.99) {
distance[0] = distance[0] / 1000;
distanceByUnit = String.valueOf(d.format(distance[0])) + " Km";
} else {
distanceByUnit = String.valueOf(d.format(distance[0])) + " m";
}
return distanceByUnit;
}
}
答案 2 :(得分：0)
使用此功能。
Geocoder编码器;
public String PointToLoc(LatLng pos )
{
String address="";
try {
List<Address>addresses=coder.getFromLocation(pos.latitude,pos.longitude,1);
if (addresses.size()>0)
{
for (int index=0;index<addresses.get(0).getMaxAddressLineIndex();index++)
address += addresses.get(0).getAddressLine(index)+"";
Log.d("Address",""+ address); //full address
Log.d("Address1",""+ addresses.get(0).getLocality()); //city
Log.d("Address2",""+ addresses.get(0).getSubLocality()); //area
}
}
catch (IOException e)
{
e.printStackTrace();
}
return address;
}
@Override
public void onInfoWindowClick(Marker marker) {
String cur_address=PointToLoc(marker.getPosition());
//Toast the above string.You will get it.
}
答案 3 :(得分：0)
使用此：
// An AsyncTask class for accessing the GeoCoding Web Service
private class GeocoderTask extends AsyncTask<String, Void, List<Address>>{
@Override
protected List<Address> doInBackground(String... locationName) {
// Creating an instance of Geocoder class
Geocoder geocoder = new Geocoder(getBaseContext());
List<Address> addresses = null;
try {
// Getting a maximum of 3 Address that matches the input text
addresses = geocoder.getFromLocationName(locationName[0], 3);
} catch (IOException e) {
e.printStackTrace();
}
return addresses;
}
@Override
protected void onPostExecute(List<Address> addresses) {
if(addresses==null || addresses.size()==0){
Toast.makeText(getBaseContext(), "No Location found", Toast.LENGTH_SHORT).show();
}
// Clears all the existing markers on the map
googleMap.clear();
// Adding Markers on Google Map for each matching address
for(int i=0;i<addresses.size();i++){
Address address = (Address) addresses.get(i);
// Creating an instance of GeoPoint, to display in Google Map
latLng = new LatLng(address.getLatitude(), address.getLongitude());
String addressText = String.format("%s, %s",
address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "",
address.getCountryName());
markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title(addressText);
googleMap.addMarker(markerOptions);
// Locate the first location
if(i==0)
googleMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
}
}