Android Open Source - StreetlightSeattleReporter My Location Listener

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License

The source code is released under:

MIT License

Java Source Code

/**
 * //  ww w  .j  a  v  a 2s.c  om
 */
package org.codeforseattle.streetlightseattlereporter;

import java.io.IOException;
import java.util.List;
import java.util.Locale;

import android.content.Context;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
// import android.util.Log;

/**
 * @author Jerry Frost
 *
 */
public class MyLocationListener implements LocationListener 
{
  Context context = null;
  LocationManager locationManager = null;
  Location location = null;
  
  public MyLocationListener(Context context, LocationManager locationManager)
  {
    this.context = context;
    this.locationManager = locationManager;
  }

  /* Update application based on new location
   * @see android.location.LocationListener#onLocationChanged(android.location.Location)
   */
  @Override
  public void onLocationChanged(Location location)
  {
    locationManager.removeUpdates(this);
    String address ="Could not find location.";
    this.location = location;
    new MyAsyncTask().execute(address);
    
//    if (location != null) {
//      address = findStreetAddress(location);
//    }
//      Intent broadcastIntent = new Intent();
//      broadcastIntent.setAction(MainActivity.LOCATION_QUERY_STR);
//      broadcastIntent.putExtra("address", address);
//      context.sendBroadcast(broadcastIntent);
  }

  /* (non-Javadoc)
   * @see android.location.LocationListener#onProviderDisabled(java.lang.String)
   */
  @Override
  public void onProviderDisabled(String arg0) {
    // TODO Auto-generated method stub

  }

  /* (non-Javadoc)
   * @see android.location.LocationListener#onProviderEnabled(java.lang.String)
   */
  @Override
  public void onProviderEnabled(String arg0) {
    // TODO Auto-generated method stub

  }

  /* (non-Javadoc)
   * @see android.location.LocationListener#onStatusChanged(java.lang.String, int, android.os.Bundle)
   */
  @Override
  public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
    // TODO Auto-generated method stub

  }
  
    // Retry twice, as the geocoder server times out occasionally.
    private String findStreetAddress(Location location)
    {
      String str = getAddressFromLocation(location);
      if (str.equals("Could not retrieve the address.")) {
        // Log.e("Geocode Server Timeout", "1st automatic retry.");
        str = getAddressFromLocation(location);
      }
      if (str.equals("Could not retrieve the address.")) {
        // Log.e("Geocode Server Timeout", "2nd automatic retry.");
        str = getAddressFromLocation(location);
      }
      return str;
    }
    
    // http://stackoverflow.com/questions/9409195/how-to-get-complete-address-from-latitude-and-longitude
    private String getAddressFromLocation(Location location)
    {
      Geocoder geocoder = new Geocoder(context, Locale.getDefault());
      List<Address> addresses = null;
    try {
      addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
    } catch (IOException e) {
      e.printStackTrace();
      // Log.e("Exception", e.getMessage());
            // Log.w("Current address location", "Cannot retrieve Address!");
    }
    if (addresses == null)
      return "Could not retrieve the address.";
    
    Address address = addresses.get(0);
    String streetAddress = address.getAddressLine(0);
    String postalCode = address.getPostalCode();
    return streetAddress + ", " + postalCode;

//      String streetAddress = addresses.get(0).getAddressLine(0);
//      String cityStateZip = addresses.get(0).getAddressLine(1);
//      return streetAddress + ", " + cityStateZip;
    }
    
    /**
     * Using ther Geocoder can be time consuming.
     * @author Jerry
     *
     */
    private class MyAsyncTask extends AsyncTask<String, Integer, String>
    {
    @Override
    protected String doInBackground(String... parameter)
    {
      String address = parameter[0];
      if (location != null) {
        address = findStreetAddress(location);
      }
      Intent broadcastIntent = new Intent();
        broadcastIntent.setAction(MainActivity.LOCATION_QUERY_STR);
        broadcastIntent.putExtra("address", address);
        context.sendBroadcast(broadcastIntent);
      
      return null;
    }
      
    @Override
    protected void onPostExecute(String result) {
      // Synchronized to UI thread.
    }
    }

}

Java Source Code List

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