Android How to - Create async task to resolve Address

Question

We would like to know how to create async task to resolve Address.
Answer

import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.os.AsyncTask;
import android.text.TextUtils;
/*from www .j  a v a  2s . c o  m*/
import java.util.Arrays;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Locale;

class AddressResolver extends AsyncTask<Double, Void, String> {
  Context context;

  public AddressResolver(Context context) {
    this.context = context;
  }
  @Override
  protected String doInBackground(Double... params) {
    final double lat = params[0], lng = params[1];

    try {
      Geocoder geocoder = new Geocoder(context, Locale.getDefault());
      List<Address> addresses = geocoder.getFromLocation(lat, lng, 1);
      if (addresses.isEmpty())
        return null;
      Address address = addresses.get(0);
      return buildAddressString(address.getAddressLine(0),
          address.getAddressLine(1), address.getPostalCode(),
          address.getAdminArea(), address.getLocality(),
          address.getCountryName());

    } catch (Exception e) {
      e.printStackTrace();
      return null;
    }
  }

  static String buildAddressString(String... parts) {
    StringBuilder stringBuilder = new StringBuilder();
    LinkedHashSet<String> uniqueParts = new LinkedHashSet<String>(
        Arrays.asList(parts));

    boolean first = true;
    for (String part : uniqueParts)
      if (TextUtils.isEmpty(part) == false) {
        if (first)
          first = false;
        else
          stringBuilder.append(", ");
        stringBuilder.append(part);
      }

    return stringBuilder.toString();
  }
}