我的问题是this question，我也为lat和lon做了同样的硬编码。
我得到例外以确认尺寸为
Exception for the locationjava.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
当我在Redmi a4上尝试相同的代码时，它工作正常，并给我1的大小，并且地理编码工作正常，返回我所有的地址。当我在联想上运行时，相同的代码就是例外。我检查了lat和lon，它们有值，当我跟踪指向我的位置时。那么我应该怎么做才能让这两款手机都可以运行该应用。 联想手机运行Android 4.4.4 Redmi运行6.0.0
if(lat != null && lon !=null) {
try{
Geocoder geocoder;
List<Address> addresses;
geocoder = new Geocoder(this, Locale.getDefault());
addresses = geocoder.getFromLocation(dlat, dlon, 1); // Here 1 represent max location result to returned, by documents it recommended 1 to 5
System.out.println("this is the size of address size"+addresses.size());
String address = addresses.get(0).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex()
String city = addresses.get(0).getLocality();
String state = addresses.get(0).getAdminArea();
String country = addresses.get(0).getCountryName();
String postalCode = addresses.get(0).getPostalCode();
String knownName = addresses.get(0).getFeatureName();
complete_address=address + "_" + city + "_" + address + "_" + postalCode + "_" + knownName + "_" + country;
txtOutputLat.setText(complete_address);
txtOutputLon.setText("Map Address");
}
catch(Exception e)
{
System.out.println("Exception for the location"+e.toString());
}
}
答案 0 :(得分：1)
创建这个类并复制这个完美适合我的代码，这也可以在后台运行并从ANR对话框中停止主线程
import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.os.AsyncTask;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
public class GetLocationAsync extends AsyncTask<String, Void, String> {
private String fulladdress = "";
private String smallAddress = "";
private String city = "";
private String state = "";
private String country = "";
private String zipcode = "";
private String placeName = "";
private AsyncResponse asyncResponseDelegate = null;
private double x, y;
private Context context;
public interface AsyncResponse {
void onProcessFinished(String fulladdress, String smallAddress, String state, String city, String country, String zipCode, String placeName);
}
public GetLocationAsync(double latitude, double longitude, final Context context, AsyncResponse asyncResponse) {
x = latitude;
y = longitude;
this.context = context;
this.asyncResponseDelegate = asyncResponse;
}
@Override
protected void onPreExecute() {
}
@Override
protected String doInBackground(String... params) {
Geocoder geocoder = new Geocoder(context, Locale.ENGLISH);
try {
List<Address> addressList = geocoder.getFromLocation(x, y, 1);
StringBuilder sb = new StringBuilder();
if (addressList != null && addressList.size() > 0) {
Address address = addressList.get(0);
fulladdress = "";
smallAddress = "";
placeName = "";
if (sb.append(address.getAddressLine(0)) != null) {
smallAddress = address.getAddressLine(0);
fulladdress = smallAddress;
}
if (address.getLocality() != null) {
city = address.getLocality();
if (!fulladdress.contains(city))
fulladdress = fulladdress + " " + city;
}
if (address.getFeatureName() != null) {
placeName = address.getFeatureName();
}
if (address.getAdminArea() != null) {
state = address.getAdminArea();
if (!fulladdress.contains(state))
fulladdress = fulladdress + " " + state;
}
if (address.getPostalCode() != null) {
zipcode = address.getPostalCode();
if (!fulladdress.contains(zipcode))
fulladdress = fulladdress + " " + zipcode;
}
if (address.getCountryName() != null) {
country = address.getCountryName();
if (!fulladdress.contains(country))
fulladdress = fulladdress + " " + country;
}
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
try {
if (fulladdress != null && !fulladdress.isEmpty()) {
asyncResponseDelegate.onProcessFinished(fulladdress, smallAddress, state, city, country, zipcode, placeName);
} else {
asyncResponseDelegate.onProcessFinished("", "", "", "", "", "", "");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
调用此类
GetLocationAsync locationAsync = new GetLocationAsync(latitude,
longitude, getActivity(), new GetLocationAsync.AsyncResponse() {
@Override
public void onProcessFinished(String fulladdress, String smallAddress, String state, String city, String country, String zipCode, String placeName) {
etAddress.setText(fulladdress);
}
});
locationAsync.execute();
答案 1 :(得分：0)
当您尝试从地址获取邮政编码，城市，国家/地区等时会发生什么情况，因为您尝试从所有邮政编码，国家，州和城市获取所有邮政编码以来，您可能无法首次接收邮件单个提供商，有时可能无法提供。相反，如果你遍历提供者，你可以在其中一个中找到它。试试这个希望它有所帮助！
List<Address> addresses = null;
try {
addresses =geocoder.getFromLocation(latitude,longitude, 5);
if (addresses.size() > 0) {
zipCode = addresses.get(0).getPostalCode();
city = addresses.get(0).getLocality();
country = addresses.get(0).getCountryName();
state = addresses.get(0).getAdminArea();
address = addresses.get(0).getAddressLine(0);
knownName = addresses.get(0).getFeatureName();
//if 1st provider does not have data, loop through other providers to find it.
int count = 0;
while ( count < addresses.size()) {
zipCode = addresses.get(count).getPostalCode();
city= addresses.get(count).getLocality();
country = addresses.get(count).getCountryName();
state = addresses.get(count).getAdminArea();
address = addresses.get(count).getAddressLine(0);
knownName = addresses.get(count).getFeatureName();
count++;
}
}
} catch (IOException e) {
e.printStackTrace();
}
答案 2 :(得分：0)
在致电地理编码器之前检查互联网连接。
if(isConnectingToInternet(getContext()){
//write your code of calling geocoder
}
public boolean isConnectingToInternet(Context context) {
try {
if (context != null) {
ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity != null) {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null)
for (int i = 0; i < info.length; i++)
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
} catch (Exception e) {
e.printStacktrace
}
return false;
}