Develop Reference

Android:reverse geocoding-how to save the address for later use?

I am building a project which needs users current location.I am using reverse geocoding to get the exact address of the user.I am using asynctask to run the thread finding the exact address in background.This is my code:
package com.prince.geolocationtest;
import android.content.Context;
import android.content.Intent;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
import java.util.Locale;
public class MainActivity extends AppCompatActivity implements LocationListener {
TextView text, text2, text3;
LocationManager location;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
location = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
String bestProvider = location.getBestProvider(criteria, true);
try {
location.requestLocationUpdates(bestProvider, 0, 0, this);
} catch (SecurityException e) {
Log.e("Permission_Exception", "Permission Not granted");
}
// text=(TextView)findViewById(R.id.textView);
text2 = (TextView) findViewById(R.id.textView2);
Toast.makeText(getApplicationContext(), "Provider=" + bestProvider, Toast.LENGTH_SHORT).show();
}
public void AddDisp(String add) {
text3 = (TextView) findViewById(R.id.textView3);
text3.setText(add);
}
#Override
public void onLocationChanged(Location location) {
double lat = location.getLatitude();
double lon = location.getLongitude();
AsyncTry obj = new AsyncTry(this);
obj.execute(lat, lon);
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
switch (status) {
case 0:
Toast.makeText(getApplicationContext(), "Out Of Service", Toast.LENGTH_SHORT).show();
break;
case 1:
Toast.makeText(getApplicationContext(), "Temporarily Unavailable", Toast.LENGTH_SHORT).show();
break;
case 2:
Toast.makeText(getApplicationContext(), "Available", Toast.LENGTH_SHORT).show();
break;
}
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(getApplicationContext(), "GPS is off", 3).show();
Intent GPSIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(GPSIntent);
}
public class AsyncTry extends AsyncTask<Double, Integer, String> {
Context context;
String add;
public AsyncTry(Context context) {
this.context = context;
}
#Override
protected String doInBackground(Double... params) {
try {
StringBuilder str = new StringBuilder();
Geocoder geocoder = new Geocoder(getBaseContext(), Locale.getDefault());
str.append("Latitude:" + params[0] + "\nLongitude:" + params[1] + "\n");
if (geocoder.isPresent()) {
List<Address> addresses = geocoder.getFromLocation(params[0], params[1], 1);
// str.append("Address:"+addresses.get(0).getLocality());
// str.append("\n"+addresses.get(0).getAdminArea());
// //String zip = addresses.get(0).getPostalCode();
// str.append("\n"+addresses.get(0).getCountryName());
if (addresses != null) {
Address fetchedAddress = addresses.get(0);
for (int i = 0; i < fetchedAddress.getMaxAddressLineIndex(); i++) {
str.append(fetchedAddress.getAddressLine(i)).append("\n");
}
}
add = str.toString();
//str.toString();
} else {
add = "Geocoder implementation doesnt exists";
}
} catch (Exception e) {
Log.d("Exception:", e.toString());
}
MainActivity.this.runOnUiThread(new Runnable() {
Location loc;
#Override
public void run() {
// TODO Auto-generated method stub
text2.setText(add);
}
});
return add;
}
protected void onpostExecute(String result) {
// super.onPostExecute(result);
if (result != null) {
text = (TextView) findViewById(R.id.textView);
text.setText(result);
AddDisp(result);
// Toast.makeText(getApplicationContext(), result.toString(), Toast.LENGTH_LONG).show();
}
}
}
}
Though the program returns the address and displays it in the main thread using runOnUiThread, I am not able to send the address to onPostExecute method of asyncTask. I need to use the address for later use rather than just displaying it.. how can I do that? I am using android studio IDE.

Use SharedPreferences:
PreferenceManager.getDefaultSharedPreferences(getApplicationContext()).edit()
.putString("ADDRESS", add)
.apply();
To get it from SharedPreferences:
String address = PreferenceManager.getDefaultSharedPreferences(getApplicationContext()).getString("ADDRESS", "");

You declared onPostExecute incorrectly. It should be like this:
#Override
protected void onPostExecute (String result);

Just rewrote your AsyncTask a little bit. You should pass the TexView you want to display the address to the AsyncTask. Does it work now ?
public class AsyncTry extends AsyncTask<Double, Integer, String> {
Context context;
TextView textView;
String add;
public AsyncTry(Context context, TextView textView) {
this.context = context;
this.textView = textView;
}
#Override
protected String doInBackground(Double... params) {
try {
StringBuilder str = new StringBuilder();
Geocoder geocoder = new Geocoder(context, Locale.getDefault());
str.append("Latitude:" + params[0] + "\nLongitude:" + params[1] + "\n");
if (geocoder.isPresent()) {
List<Address> addresses = geocoder.getFromLocation(params[0], params[1], 1);
if (addresses != null) {
Address fetchedAddress = addresses.get(0);
for (int i = 0; i < fetchedAddress.getMaxAddressLineIndex(); i++) {
str.append(fetchedAddress.getAddressLine(i)).append("\n");
}
}
add = str.toString();
} else {
add = "Geocoder implementation doesnt exists";
}
} catch (Exception e) {
Log.d("Exception:", e.toString());
}
return add;
}
protected void onPostExecute(String result) {
if (result != null) {
textView.setText(result);
}
}
}

what is wrong with this piece of code?i am getting "null pointer exception".code is about drawing route on map [duplicate]

This question already has answers here:
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 7 years ago.
private String getMapsApiDirectionsUrl() {
String origin;
String destination=String.valueOf(l.longitude)+","+String.valueOf(l.latitude);
origin=String.valueOf(longitude)+","+String.valueOf(latitude);
// String url = "https://maps.googleapis.com/maps/api/directions/"+ output + "?" + params;
String url="https://maps.googleapis.com/maps/api/directions/json?origin="+origin+"&destination="+destination+"&sensor=false";
return url;
}
I am getting NullPointerException. I know what it is but not able to identify what is causing it. Assuming everything outside this method is correct, what is wrong syntactically?
This is my entire code:
package autogenie.maptrial;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.graphics.Color;
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.os.Handler;
import android.os.Message;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.location.places.Place;
import com.google.android.gms.location.places.ui.PlaceAutocompleteFragment;
import com.google.android.gms.location.places.ui.PlaceSelectionListener;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.PolylineOptions;
import org.json.JSONObject;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
public class MainActivity extends FragmentActivity implements LocationListener,GoogleMap.OnMarkerDragListener {
private double latitude, longitude;
public GoogleMap googleMap,googleMap1;
LocationManager locationManager;
Button addressButton;
PlaceAutocompleteFragment fragment;
LatLng l;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SupportMapFragment supportMapFragment =
(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
googleMap = supportMapFragment.getMap();
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
googleMap.setMyLocationEnabled(true);
addressButton = (Button) findViewById(R.id.addressButton);
fragment = (PlaceAutocompleteFragment) getFragmentManager().findFragmentById(R.id.place_autocomplete_fragment);
String url = getMapsApiDirectionsUrl();
ReadTask downloadTask = new ReadTask();
downloadTask.execute(url);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
addressButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
EditText editText = (EditText) findViewById(R.id.enter_place_name);
String address = editText.getText().toString();
GeocodingLocation locationAddress = new GeocodingLocation();
locationAddress.getAddressFromLocation(address,
getApplicationContext(), new GeocoderHandler());
l= getLocationFromAddress(getApplicationContext(), address);
MarkerOptions a=new MarkerOptions().position(l);
Marker m=googleMap.addMarker(a);
m.setPosition(l);
}
});
fragment.setOnPlaceSelectedListener(new PlaceSelectionListener() {
#Override
public void onPlaceSelected(Place place) { // Handle the selected Place
}
#Override
public void onError(Status status) { // Handle the error
}
});
}
public LatLng getLocationFromAddress(Context context,String strAddress) {
Geocoder coder = new Geocoder(context,Locale.getDefault());
List<Address> address;
LatLng p1 = null;
try {
address = coder.getFromLocationName(strAddress, 1);
if (address == null) {
return null;
}
Address location = address.get(0);
location.getLatitude();
location.getLongitude();
p1 = new LatLng(location.getLatitude(), location.getLongitude() );
} catch (Exception ex) {
ex.printStackTrace();
}
return p1;
}
private class GeocoderHandler extends Handler {
#Override
public void handleMessage(Message message) {
String locationAddress;
switch (message.what) {
case 1:
Bundle bundle = message.getData();
locationAddress = bundle.getString("address");
break;
default:
locationAddress = null;
}
Toast.makeText(getApplicationContext(),locationAddress,Toast.LENGTH_LONG).show();
}
}
#Override
public void onLocationChanged(Location location) {
if (location == null) {
latitude = 28.608426;
longitude = 77.225168;
} else {
longitude = location.getLongitude();
latitude = location.getLatitude();
}
String s = "longitude:" + longitude + "latitude:" + latitude;
Log.i("Current location", " latlong value" + s);
googleMap.addMarker(new MarkerOptions()
.position(new LatLng(latitude, longitude))
.title("Hello world"));
/*CameraUpdate center =
CameraUpdateFactory.newLatLng(new LatLng(latitude,
-longitude));
CameraUpdate zoom = CameraUpdateFactory.zoomTo(10);
googleMap.moveCamera(center);
googleMap.animateCamera(zoom);*/
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onMarkerDragStart(Marker marker) {
}
#Override
public void onMarkerDrag(Marker marker) {
}
#Override
public void onMarkerDragEnd(Marker marker) {
}
//dfg
private String getMapsApiDirectionsUrl() {
// String url = "https://maps.googleapis.com/maps/api/directions/"+ output + "?" + params;
String url="https://maps.googleapis.com/maps/api/directions/json?origin="+l+"&destination="+latitude+","+longitude+"&sensor=false";
return url;
}
private class ReadTask extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... url) {
String data = "";
try {
HttpConnection http = new HttpConnection();
data = http.readUrl(url[0]);
} catch (Exception e) {
Log.d("Background Task", e.toString());
}
return data;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
new ParserTask().execute(result);
}
}
private class ParserTask extends
AsyncTask<String, Integer, List<List<HashMap<String, String>>>> {
#Override
protected List<List<HashMap<String, String>>> doInBackground(
String... jsonData) {
JSONObject jObject;
List<List<HashMap<String, String>>> routes = null;
try {
jObject = new JSONObject(jsonData[0]);
PathJSONParser parser = new PathJSONParser();
routes = parser.parse(jObject);
} catch (Exception e) {
e.printStackTrace();
}
return routes;
}
#Override
protected void onPostExecute(List<List<HashMap<String, String>>> routes) {
ArrayList<LatLng> points = null;
PolylineOptions polyLineOptions = null;
// traversing through routes
for (int i = 0; i < routes.size(); i++) {
points = new ArrayList<LatLng>();
polyLineOptions = new PolylineOptions();
List<HashMap<String, String>> path = routes.get(i);
for (int j = 0; j < path.size(); j++) {
HashMap<String, String> point = path.get(j);
double lat = Double.parseDouble(point.get("lat"));
double lng = Double.parseDouble(point.get("lng"));
LatLng position = new LatLng(lat, lng);
points.add(position);
}
polyLineOptions.addAll(points);
polyLineOptions.width(2);
polyLineOptions.color(Color.BLUE);
}
googleMap.addPolyline(polyLineOptions);
}
}
class GeocodingLocation {
private static final String TAG = "GeocodingLocation";
public String result1,result2;
public void getAddressFromLocation(final String locationAddress,
final Context context, final Handler handler) {
Thread thread = new Thread() {
#Override
public void run() {
Geocoder geocoder = new Geocoder(context, Locale.getDefault());
String result = null;
try {
List
addressList = geocoder.getFromLocationName(locationAddress, 1);
if (addressList != null && addressList.size() > 0) {
Address address = (Address) addressList.get(0);
StringBuilder sb = new StringBuilder();
sb.append(address.getLatitude()).append("\n");
sb.append(address.getLongitude()).append("\n");
result = sb.toString();
}
} catch (IOException e) {
Log.e(TAG, "Unable to connect to Geocoder", e);
} finally {
Message message = Message.obtain();
message.setTarget(handler);
if (result != null) {
message.what = 1;
Bundle bundle = new Bundle();
result = "Address: " + locationAddress +
"\n\nLatitude and Longitude :\n" + result;
bundle.putString("address", result);
message.setData(bundle);
} else {
message.what = 1;
Bundle bundle = new Bundle();
result = "Address: " + locationAddress +
"\n Unable to get Latitude and Longitude for this address location.";
bundle.putString("address", result);
message.setData(bundle);
}
message.sendToTarget();
}
}
};
thread.start();
}
}
}
Stack Trace:
FATAL EXCEPTION: main
java.lang.NullPointerException
at com.google.maps.api.android.lib6.e.aw.<init>(Unknown Source)
at com.google.maps.api.android.lib6.e.ev.a(Unknown Source)
at com.google.android.gms.maps.internal.j.onTransact(SourceFile:137)
at android.os.Binder.transact(Binder.java:310)
at com.google.android.gms.maps.internal.IGoogleMapDelegate$zza$zza.addPolyline(Unknown Source)
at com.google.android.gms.maps.GoogleMap.addPolyline(Unknown Source)
at autogenie.maptrial.MainActivity$ParserTask.onPostExecute(MainActivity.java:315)
at autogenie.maptrial.MainActivity$ParserTask.onPostExecute(MainActivity.java:267)
at android.os.AsyncTask.finish(AsyncTask.java:631)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
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:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method) 01-21 12:24:35.291 3683-3683/autogenie.maptrial I/Process: Sending signal. PID: 3683 SIG: 9

one of your variables(l, latitude, longitude) is null since the only place that might cause the exception is the valueOf calls.

Trouble in reverse Geo-coding while converting co-ordinates to address using getFromLocation

I am having trouble reversing Geo-coding using getFromLocation.
I am using Android Studio and passing the Coordinates via the Device Monitor.
The coordinates show alright, but the address remains empty.
I have tried a number of solutions posted here on StackOverflow, even known none crashes, I still can't get the address.
Here is the snippet of the code. I am using.
#Override
public void onLocationChanged(Location location){
double lat = (location.getLatitude());
double lng = (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
//Get address base on location
try{
Geocoder geo = new Geocoder(this, Locale.getDefault());
List<Address> addresses = geo.getFromLocation(lat, lng, 1);
if (addresses.isEmpty()) {
endereco.setText("Waiting for Location");
}
else {
if (addresses.size() > 0) {
Log.d(TAG,addresses.get(0).getFeatureName() + ", " + addresses.get(0).getLocality() +", " + addresses.get(0).getAdminArea() + ", " + addresses.get(0).getCountryName());
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
On the Geocoder line, I have tried this aswell
Geocoder geo = new Geocoder(GPSActivity.this.getApplicationContext(), Locale.getDefault());
And if needed here is the code of the entire activity
import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
import java.util.Locale;
/**
* Created by Usuário on 05/02/2015.
*/
public class GPSActivity extends Activity implements LocationListener {
private static final String TAG = null;
private TextView latituteField;
private TextView longitudeField;
private TextView endereco;
private LocationManager locationManager;
private String provider;
/**
* Called when the activity is first created.
*/
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.gps);
latituteField = (TextView) findViewById(R.id.TextView02);
longitudeField = (TextView) findViewById(R.id.TextView04);
endereco = (TextView) findViewById(R.id.Endereco);
//Get the Location Manager
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//Define the criteria how to select location provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria,false);
Location location = locationManager.getLastKnownLocation(provider);
// Initialize the location fields
if (location != null){
System.out.println("Provider " + provider + " has been selected");
onLocationChanged(location);
}else{
latituteField.setText("Locação não disponível");
longitudeField.setText("Locação não disponível");
}
}
/**
* Request updates at startup
*/
#Override
protected void onResume(){
super.onResume();
locationManager.requestLocationUpdates(provider, 400, 1, this);
}
/**
* Remove the LocationListener updates when Activity is paused
*/
#Override
protected void onPause(){
super.onPause();
locationManager.removeUpdates(this);
}
#Override
public void onLocationChanged(Location location){
double lat = (location.getLatitude());
double lng = (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
//Get address base on location
try{
Geocoder geo = new Geocoder(GPSActivity.this.getApplicationContext(), Locale.getDefault());
List<Address> addresses = geo.getFromLocation(lat, lng, 1);
if (addresses.isEmpty()) {
endereco.setText("Waiting for Location");
}
else {
if (addresses.size() > 0) {
Log.d(TAG,addresses.get(0).getFeatureName() + ", " + addresses.get(0).getLocality() +", " + addresses.get(0).getAdminArea() + ", " + addresses.get(0).getCountryName());
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras){
//TODO Auto-generated method tub
}
#Override
public void onProviderEnabled(String provider) {
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(this, "Disabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
}

I made a couple of changes in the code and manage to get it to work.
The thing that solved the problem is the bit.
char[] buffer = new char[2048];
Reader reader = new InputStreamReader(entity.getContent(), "UTF-8");
while (true) {
int n = reader.read(buffer);
if (n < 0) {
break;
}
stringBuilder.append(buffer, 0, n);
}
But since I changed a lot of stuff, I will post the complete code bellow.
package br.com.agenciaeisberg.qm;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
/**
* Created by Usuário on 05/02/2015.
*/
public class GPSActivity extends Activity implements LocationListener {
private TextView latituteField;
private TextView longitudeField;
private TextView endereco;
private LocationManager locationManager;
private String provider;
/**
* Called when the activity is first created.
*/
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.gps);
latituteField = (TextView) findViewById(R.id.TextView02);
longitudeField = (TextView) findViewById(R.id.TextView04);
endereco = (TextView) findViewById(R.id.Endereco);
//Get the Location Manager
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//Define the criteria how to select location provider -> use
// default
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria,false);
Location location = locationManager.getLastKnownLocation(provider);
// Initialize the location fields
if (location != null){
System.out.println("Provider " + provider + " has been selected");
onLocationChanged(location);
}else{
latituteField.setText("Locação não disponível");
longitudeField.setText("Locação não disponível");
}
}
/**
* Request updates at startup
*/
#Override
protected void onResume(){
super.onResume();
locationManager.requestLocationUpdates(provider, 400, 1, this);
}
/**
* Remove the LocationListener updates when Activity is paused
*/
#Override
protected void onPause(){
super.onPause();
locationManager.removeUpdates(this);
}
#Override
public void onLocationChanged(Location location){
double lat = (location.getLatitude());
double lng = (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
// Encontrando Endereço
new EncontrarEndereco().execute();
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras){
//TODO Auto-generated method tub
}
#Override
public void onProviderEnabled(String provider) {
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(this, "Disabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
class EncontrarEndereco extends AsyncTask<String, String, JSONObject> {
ProgressDialog pDialog = new ProgressDialog(GPSActivity.this);
#Override
protected void onPreExecute(){
super.onPreExecute();
pDialog.setMessage("Aguarde, enquanto buscamos seu endereço");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
double lat = -19.971864410192393;
double lng = -43.97544760674483;
HttpGet httpGet = new HttpGet("http://maps.google.com/maps/api/geocode/json?latlng="+lat+","+lng+"&sensor=true&language=pt&region=BR&output=xml&oe=utf8");
HttpClient client = new DefaultHttpClient();
HttpResponse response;
StringBuilder stringBuilder = new StringBuilder();
protected JSONObject doInBackground (String... args){
try {
response = client.execute(httpGet);
HttpEntity entity = response.getEntity();
char[] buffer = new char[2048];
Reader reader = new InputStreamReader(entity.getContent(), "UTF-8");
while (true) {
int n = reader.read(buffer);
if (n < 0) {
break;
}
stringBuilder.append(buffer, 0, n);
}
int b;
while ((b = reader.read()) != -1) {
stringBuilder.append((char) b);
}
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
JSONObject jsonObject = new JSONObject();
try {
jsonObject = new JSONObject(stringBuilder.toString());
} catch (JSONException e) {
e.printStackTrace();
}
return jsonObject;
}
protected void onPostExecute(final JSONObject jsonObject) {
// Dismiss a caixa de dialogo depois de buscar todos os items
String numero;
String rua;
String bairro;
String cidade;
String estado;
String pais;
String endereco_compelto;
pDialog.dismiss();
Log.i("JSON string =>", jsonObject.toString());
try {
String status = jsonObject.getString("status");
Log.i("status", status);
if(status.equalsIgnoreCase("OK")){
JSONArray results = jsonObject.getJSONArray("results");
JSONObject r = results.getJSONObject(0);
JSONArray addressComponentsArray = r.getJSONArray("address_components");
JSONObject addressComponents = addressComponentsArray.getJSONObject(0);
numero = addressComponents.getString("short_name");
Log.i("Número", numero);
JSONObject addressComponents1 = addressComponentsArray.getJSONObject(1);
rua = addressComponents1.getString("long_name");
Log.i("Rua", rua);
JSONObject addressComponents2 = addressComponentsArray.getJSONObject(2);
bairro = addressComponents2.getString("long_name");
Log.i("Bairro ", bairro);
JSONObject addressComponents3 = addressComponentsArray.getJSONObject(3);
cidade = addressComponents3.getString("long_name");
Log.i("Cidade ", cidade);
JSONObject addressComponents5 = addressComponentsArray.getJSONObject(5);
estado = addressComponents5.getString("short_name");
Log.i("Estado ", estado);
JSONObject addressComponents6 = addressComponentsArray.getJSONObject(6);
pais = addressComponents6.getString("long_name");
Log.i("Pais ", pais);
endereco_compelto = rua + ", " + numero + " - " + bairro + ", " + cidade + " - " + estado + ", " + pais;
endereco.setText(endereco_compelto);
}
}catch (JSONException e) {
Log.e("testing","Failed to load JSON");
e.printStackTrace();
}
}
}
}

how I can get the city name of my current position?

I'm working with android studio and in a popup dialog I want that users can get their position but all I know to do is get my latitude and longitude.
This is the code
import android.app.Activity;
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements LocationListener {
private TextView latituteField;
private TextView longitudeField;
private LocationManager locationManager;
private String provider;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
latituteField = (TextView) findViewById(R.id.TextView02);
longitudeField = (TextView) findViewById(R.id.TextView04);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
if (location != null) {
System.out.println("Provider " + provider + " has been selected.");
onLocationChanged(location);
} else {
latituteField.setText("Location not available");
longitudeField.setText("Location not available");
}
}
#Override
protected void onResume() {
super.onResume();
locationManager.requestLocationUpdates(provider, 400, 1, this);
}
#Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
#Override
public void onLocationChanged(Location location) {
int lat = (int) (location.getLatitude());
int lng = (int) (location.getLongitude());
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(this, "Disabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
}
in the MainActivity.Can you help me?
I've added this in the manifest
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"/>
but it still says "Location not available".

You need the GeoCoder class to get Address from a given Lat/Long. try the following:
Geocoder geoCoder = new Geocoder(this, Locale.getDefault()); //it is Geocoder
StringBuilder builder = new StringBuilder();
try {
List<Address> address = geoCoder.getFromLocation(latitude, longitude, 1);
int maxLines = address.get(0).getMaxAddressLineIndex();
for (int i=0; i<maxLines; i++) {
String addressStr = address.get(0).getAddressLine(i);
builder.append(addressStr);
builder.append(" ");
}
String fnialAddress = builder.toString(); //This is the complete address.
} catch (IOException e) {}
catch (NullPointerException e) {}
Code below should work for you: (Check the inline comments regarding your code)
import java.io.IOException;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements LocationListener {
private TextView latituteField;
private TextView longitudeField;
private TextView addressField; //Add a new TextView to your activity_main to display the address
private LocationManager locationManager;
private String provider;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
latituteField = (TextView) findViewById(R.id.TextView02);
longitudeField = (TextView) findViewById(R.id.TextView04);
addressField = (TextView) findViewById(R.id.TextView05); //Make sure you add this to activity_main
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
if (location != null) {
System.out.println("Provider " + provider + " has been selected.");
onLocationChanged(location);
} else {
latituteField.setText("Location not available");
longitudeField.setText("Location not available");
}
}
#Override
protected void onResume() {
super.onResume();
locationManager.requestLocationUpdates(provider, 400, 1, this);
}
#Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
#Override
public void onLocationChanged(Location location) {
//You had this as int. It is advised to have Lat/Loing as double.
double lat = location.getLatitude();
double lng = location.getLongitude();
Geocoder geoCoder = new Geocoder(this, Locale.getDefault());
StringBuilder builder = new StringBuilder();
try {
List<Address> address = geoCoder.getFromLocation(lat, lng, 1);
int maxLines = address.get(0).getMaxAddressLineIndex();
for (int i=0; i<maxLines; i++) {
String addressStr = address.get(0).getAddressLine(i);
builder.append(addressStr);
builder.append(" ");
}
String fnialAddress = builder.toString(); //This is the complete address.
latituteField.setText(String.valueOf(lat));
longitudeField.setText(String.valueOf(lng));
addressField.setText(fnialAddress); //This will display the final address.
} catch (IOException e) {
// Handle IOException
} catch (NullPointerException e) {
// Handle NullPointerException
}
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
Toast.makeText(this, "Enabled new provider " + provider,
Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(this, "Disabled provider " + provider,
Toast.LENGTH_SHORT).show();
}
}

You need to execute the Geocoder in a AsyncTask (or in a Thread not in the same ThreadGroup as the UI Thread)!
public void getCityName(final Location location, final OnGeocoderFinishedListener listener) {
new AsyncTask<Void, Integer, List<Address>>() {
#Override
protected List<Address> doInBackground(Void... arg0) {
Geocoder coder = new Geocoder(getContext(), Locale.ENGLISH);
List<Address> results = null;
try {
results = coder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
} catch (IOException e) {
// nothing
}
return results;
}
#Override
protected void onPostExecute(List<Address> results) {
if (results != null && listener != null) {
listener.onFinished(results);
}
}
}.execute();
}
With this abstract Listener
public abstract class OnGeocoderFinishedListener {
public abstract void onFinished(List<Address> results);
}
Now call the method like this:
getCityName(location, new OnGeocoderFinishedListener() {
#Override
public void onFinished(List<Address> results) {
// do something with the result
}
});
Hope this will help some of you!

You can use google api to get current location address. Check out my answer in this post go get your city.
How to get city name from latitude and longitude coordinates in Google Maps?

Location not updating using google maps apiv2

I m struggling for integrating google maps in my app. I have somehow managed to display map with user location and nearby locations but the location is not updating...I have gone through the code several time but havent found a single incorrect command..plz help me sort it out..
NearbyPlacesActivity -
package com.example.travelplanner;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;
/*
* MyMapActivity class forms part of Map application
* in Mobiletuts+ tutorial series:
* Using Google Maps and Google Places in Android Apps
*
* This version of the class is for the final part of the series.
*
* Sue Smith
* March/ April 2013
*/
public class NearbyPlacesActivity extends Activity implements LocationListener {
//instance variables for Marker icon drawable resources
private int userIcon, foodIcon, drinkIcon, shopIcon, otherIcon;
//the map
private GoogleMap theMap;
//location manager
private LocationManager locMan;
//user marker
private Marker userMarker;
//places of interest
private Marker[] placeMarkers;
//max
private final int MAX_PLACES = 20;//most returned from google
//marker options
private MarkerOptions[] places;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_nearby_places);
//get drawable IDs
userIcon = R.drawable.yellow_point;
foodIcon = R.drawable.red_point;
drinkIcon = R.drawable.blue_point;
shopIcon = R.drawable.green_point;
otherIcon = R.drawable.purple_point;
//find out if we already have it
if(theMap==null){
//get the map
theMap = ((MapFragment)getFragmentManager().findFragmentById(R.id.the_map)).getMap();
//check in case map/ Google Play services not available
if(theMap!=null){
//ok - proceed
theMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//create marker array
placeMarkers = new Marker[MAX_PLACES];
//update location
updatePlaces();
}
}
}
//location listener functions
#Override
public void onLocationChanged(Location location) {
Log.v("MyMapActivity", "location changed");
updatePlaces();
}
#Override
public void onProviderDisabled(String provider){
Log.v("MyMapActivity", "provider disabled");
}
#Override
public void onProviderEnabled(String provider) {
Log.v("MyMapActivity", "provider enabled");
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.v("MyMapActivity", "status changed");
}
/*
* update the place markers
*/
private void updatePlaces(){
//get location manager
locMan = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
//get last location
Location lastLoc = locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
double lat = lastLoc.getLatitude();
double lng = lastLoc.getLongitude();
Toast.makeText(getApplicationContext(), lat+","+lng, Toast.LENGTH_LONG).show();
//create LatLng
LatLng lastLatLng = new LatLng(lat, lng);
//remove any existing marker
if(userMarker!=null) userMarker.remove();
//create and set marker properties
userMarker = theMap.addMarker(new MarkerOptions()
.position(lastLatLng)
.title("You are here")
.icon(BitmapDescriptorFactory.fromResource(userIcon))
.snippet("Your last recorded location"));
//move to location
theMap.animateCamera(CameraUpdateFactory.newLatLng(lastLatLng), 3000, null);
//build places query string
String placesSearchStr = "https://maps.googleapis.com/maps/api/place/nearbysearch/" +
"json?location="+lat+","+lng+
"&radius=7000&sensor=true" +
"&types=food|bar|movie_theater|museum|bank"+
"&key=AIzaSyBqDgqbxFenOtooTivY5YSsJ2JrwBK42hw";//ADD KEY
//execute query
new GetPlaces().execute(placesSearchStr);
locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 30000, 100, this);
}
private class GetPlaces extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... placesURL) {
//fetch places
//build result as string
StringBuilder placesBuilder = new StringBuilder();
//process search parameter string(s)
for (String placeSearchURL : placesURL) {
HttpClient placesClient = new DefaultHttpClient();
try {
//try to fetch the data
//HTTP Get receives URL string
HttpGet placesGet = new HttpGet(placeSearchURL);
//execute GET with Client - return response
HttpResponse placesResponse = placesClient.execute(placesGet);
//check response status
StatusLine placeSearchStatus = placesResponse.getStatusLine();
//only carry on if response is OK
if (placeSearchStatus.getStatusCode() == 200) {
//get response entity
HttpEntity placesEntity = placesResponse.getEntity();
//get input stream setup
InputStream placesContent = placesEntity.getContent();
//create reader
InputStreamReader placesInput = new InputStreamReader(placesContent);
//use buffered reader to process
BufferedReader placesReader = new BufferedReader(placesInput);
//read a line at a time, append to string builder
String lineIn;
while ((lineIn = placesReader.readLine()) != null) {
placesBuilder.append(lineIn);
}
}
}
catch(Exception e){
e.printStackTrace();
}
}
return placesBuilder.toString();
}
//process data retrieved from doInBackground
protected void onPostExecute(String result) {
//parse place data returned from Google Places
//remove existing markers
if(placeMarkers!=null){
for(int pm=0; pm<placeMarkers.length; pm++){
if(placeMarkers[pm]!=null)
placeMarkers[pm].remove();
}
}
try {
//parse JSON
//create JSONObject, pass stinrg returned from doInBackground
JSONObject resultObject = new JSONObject(result);
//get "results" array
JSONArray placesArray = resultObject.getJSONArray("results");
//marker options for each place returned
places = new MarkerOptions[placesArray.length()];
//loop through places
for (int p=0; p<placesArray.length(); p++) {
//parse each place
//if any values are missing we won't show the marker
boolean missingValue=false;
LatLng placeLL=null;
String placeName="";
String vicinity="";
int currIcon = otherIcon;
try{
//attempt to retrieve place data values
missingValue=false;
//get place at this index
JSONObject placeObject = placesArray.getJSONObject(p);
//get location section
JSONObject loc = placeObject.getJSONObject("geometry")
.getJSONObject("location");
//read lat lng
placeLL = new LatLng(Double.valueOf(loc.getString("lat")),
Double.valueOf(loc.getString("lng")));
//get types
JSONArray types = placeObject.getJSONArray("types");
//loop through types
for(int t=0; t<types.length(); t++){
//what type is it
String thisType=types.get(t).toString();
//check for particular types - set icons
if(thisType.contains("food")){
currIcon = foodIcon;
break;
}
else if(thisType.contains("bar")){
currIcon = drinkIcon;
break;
}
else if(thisType.contains("movie_theater")){
currIcon = shopIcon;
break;
}
}
//vicinity
vicinity = placeObject.getString("vicinity");
//name
placeName = placeObject.getString("name");
}
catch(JSONException jse){
Log.v("PLACES", "missing value");
missingValue=true;
jse.printStackTrace();
}
//if values missing we don't display
if(missingValue) places[p]=null;
else
places[p]=new MarkerOptions()
.position(placeLL)
.title(placeName)
.icon(BitmapDescriptorFactory.fromResource(currIcon))
.snippet(vicinity);
}
}
catch (Exception e) {
e.printStackTrace();
}
if(places!=null && placeMarkers!=null){
for(int p=0; p<places.length && p<placeMarkers.length; p++){
//will be null if a value was missing
if(places[p]!=null)
placeMarkers[p]=theMap.addMarker(places[p]);
}
}
}
}
#Override
protected void onResume() {
super.onResume();
if(theMap!=null){
locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 30000, 100, this);
}
}
#Override
protected void onPause() {
super.onPause();
if(theMap!=null){
locMan.removeUpdates(this);
}
}
}
There is no error in logcat. The Manifest is accurate as per my concern...the API keys are also correct..
There is one more thing I want to know....How can I show a particular city's map by clickin on a button of previous activity..for eg: In activity one i typed New York in edittext and clicked button and it opened Activity two containing map and points to New York city...I also want to show the tourist attractions in newyork by different markers.... Can someone show me a way or tut for this..thanks in advance
This is the Revised code as per your guidance..
package com.example.travelplanner;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URLEncoder;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.Log;
import android.view.Menu;
import android.widget.Toast;
/*
* MyMapActivity class forms part of Map application
* in Mobiletuts+ tutorial series:
* Using Google Maps and Google Places in Android Apps
*
* This version of the class is for the final part of the series.
*
* Sue Smith
* March/ April 2013
*/
public class NearbyPlacesActivity extends Activity implements LocationListener {
//instance variables for Marker icon drawable resources
private int userIcon, foodIcon, drinkIcon, shopIcon, otherIcon;
//the map
private GoogleMap theMap;
//location manager
private LocationManager locMan;
//user marker
private Marker userMarker;
//places of interest
private Marker[] placeMarkers;
//max
private final int MAX_PLACES = 20;//most returned from google
//marker options
private MarkerOptions[] places;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_nearby_places);
//get drawable IDs
userIcon = R.drawable.yellow_point;
foodIcon = R.drawable.red_point;
drinkIcon = R.drawable.blue_point;
shopIcon = R.drawable.green_point;
otherIcon = R.drawable.purple_point;
//find out if we already have it
if(theMap==null){
//get the map
theMap = ((MapFragment)getFragmentManager().findFragmentById(R.id.the_map)).getMap();
//check in case map/ Google Play services not available
if(theMap!=null){
//ok - proceed
theMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//create marker array
placeMarkers = new Marker[MAX_PLACES];
}
}
}
//location listener functions
#Override
public void onLocationChanged(Location location) {
Log.v("MyMapActivity", "location changed");
updatePlaces(location);
}
#Override
public void onProviderDisabled(String provider){
Log.v("MyMapActivity", "provider disabled");
}
#Override
public void onProviderEnabled(String provider) {
Log.v("MyMapActivity", "provider enabled");
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.v("MyMapActivity", "status changed");
}
/*
* update the place markers
*/
private void updatePlaces(Location givenlocation){
//get location manager
double lat = givenlocation.getLatitude();
double lng = givenlocation.getLongitude();
Toast.makeText(getApplicationContext(), lat+","+lng, Toast.LENGTH_LONG).show();
//create LatLng
LatLng lastLatLng = new LatLng(lat, lng);
//remove any existing marker
if(userMarker!=null) userMarker.remove();
//create and set marker properties
userMarker = theMap.addMarker(new MarkerOptions()
.position(lastLatLng)
.title("You are here")
.icon(BitmapDescriptorFactory.fromResource(userIcon))
.snippet("Your last recorded location"));
//move to location
theMap.animateCamera(CameraUpdateFactory.newLatLng(lastLatLng), 3000, null);
//build places query string
#SuppressWarnings("deprecation")
String encodedstr = URLEncoder.encode("food|bar|movie_theater|museum|bank");
String placesSearchStr = "https://maps.googleapis.com/maps/api/place/nearbysearch/" +
"json?location="+lat+","+lng+
"&radius=7000&sensor=true"+
"&types="+encodedstr+
"&key=AIzaSyBqDgqbxFenOtooTivY5YSsJ2JrwBK42hw";//ADD KEY
//execute query
new GetPlaces().execute(placesSearchStr);
locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 30000, 100, this);
}
private class GetPlaces extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... placesURL) {
//fetch places
//build result as string
StringBuilder placesBuilder = new StringBuilder();
//process search parameter string(s)
for (String placeSearchURL : placesURL) {
HttpClient placesClient = new DefaultHttpClient();
try {
//try to fetch the data
//HTTP Get receives URL string
HttpGet placesGet = new HttpGet(placeSearchURL);
//execute GET with Client - return response
HttpResponse placesResponse = placesClient.execute(placesGet);
//check response status
StatusLine placeSearchStatus = placesResponse.getStatusLine();
//only carry on if response is OK
if (placeSearchStatus.getStatusCode() == 200) {
//get response entity
HttpEntity placesEntity = placesResponse.getEntity();
//get input stream setup
InputStream placesContent = placesEntity.getContent();
//create reader
InputStreamReader placesInput = new InputStreamReader(placesContent);
//use buffered reader to process
BufferedReader placesReader = new BufferedReader(placesInput);
//read a line at a time, append to string builder
String lineIn;
while ((lineIn = placesReader.readLine()) != null) {
placesBuilder.append(lineIn);
}
}
}
catch(Exception e){
e.printStackTrace();
}
}
return placesBuilder.toString();
}
//process data retrieved from doInBackground
protected void onPostExecute(String result) {
//parse place data returned from Google Places
//remove existing markers
if(placeMarkers!=null){
for(int pm=0; pm<placeMarkers.length; pm++){
if(placeMarkers[pm]!=null)
placeMarkers[pm].remove();
}
}
try {
//parse JSON
//create JSONObject, pass stinrg returned from doInBackground
JSONObject resultObject = new JSONObject(result);
//get "results" array
JSONArray placesArray = resultObject.getJSONArray("results");
//marker options for each place returned
places = new MarkerOptions[placesArray.length()];
//loop through places
for (int p=0; p<placesArray.length(); p++) {
//parse each place
//if any values are missing we won't show the marker
boolean missingValue=false;
LatLng placeLL=null;
String placeName="";
String vicinity="";
int currIcon = otherIcon;
try{
//attempt to retrieve place data values
missingValue=false;
//get place at this index
JSONObject placeObject = placesArray.getJSONObject(p);
//get location section
JSONObject loc = placeObject.getJSONObject("geometry")
.getJSONObject("location");
//read lat lng
placeLL = new LatLng(Double.valueOf(loc.getString("lat")),
Double.valueOf(loc.getString("lng")));
//get types
JSONArray types = placeObject.getJSONArray("types");
//loop through types
for(int t=0; t<types.length(); t++){
//what type is it
String thisType=types.get(t).toString();
//check for particular types - set icons
if(thisType.contains("food")){
currIcon = foodIcon;
break;
}
else if(thisType.contains("bar")){
currIcon = drinkIcon;
break;
}
else if(thisType.contains("movie_theater")){
currIcon = shopIcon;
break;
}
}
//vicinity
vicinity = placeObject.getString("vicinity");
//name
placeName = placeObject.getString("name");
}
catch(JSONException jse){
Log.v("PLACES", "missing value");
missingValue=true;
jse.printStackTrace();
}
//if values missing we don't display
if(missingValue) places[p]=null;
else
places[p]=new MarkerOptions()
.position(placeLL)
.title(placeName)
.icon(BitmapDescriptorFactory.fromResource(currIcon))
.snippet(vicinity);
}
}
catch (Exception e) {
e.printStackTrace();
}
if(places!=null && placeMarkers!=null){
for(int p=0; p<places.length && p<placeMarkers.length; p++){
//will be null if a value was missing
if(places[p]!=null)
placeMarkers[p]=theMap.addMarker(places[p]);
}
}
}
}
#Override
protected void onResume() {
super.onResume();
if(theMap!=null){
//get location manager
locMan = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
//get last location
Location lastLoc = locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 30000, 100, this);
updatePlaces(lastLoc);
}
}
#Override
protected void onPause() {
super.onPause();
if(theMap!=null){
locMan.removeUpdates(this);
}
}
}
Please have a check on it...it is not updating my location...although its showinng nearby locations..thanks in advance

The problems seems to be that whenever you get a call to onLocationChanged(), you are calling updatePlaces() method where you are reintialising your location manager. The line locMan = (LocationManager)getSystemService(Context.LOCATION_SERVICE); will return a new instance of the location manager and then you are calling getLastKnownLocation for this new location manager. Your getLastKnownLocation must be returning an outdated location information and hence you may not be seeing any update. You end up using this location instead of the fresh location return by your change listener.
You can initialise these and call updatePlaces in onResume like below :
#Override
protected void onResume() {
super.onResume();
if(theMap!=null){
//get location manager
locMan = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
//get last location
Location lastLoc = locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
locMan.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 30000, 100, this);
updatePlaces(lastLoc)
}
}
Modify locationchanged:
#Override
public void onLocationChanged(Location location) {
Log.v("MyMapActivity", "location changed");
updatePlaces(location);
}
Modify updateplaces:
private void updatePlaces(Location givenlocation){
double lat = givenlocation.getLatitude();
double lng = givenlocation.getLongitude();
Toast.makeText(getApplicationContext(), lat+","+lng, Toast.LENGTH_LONG).show();
//create LatLng
LatLng lastLatLng = new LatLng(lat, lng);
*****Call further steps using the above location ******
Currently you are using the location API that is part of android platform . I would also suggest you can migrate to the new The Google Location Services API, part of Google Play Services as it handles location updates and battery conservation in an improved manner.