Develop Reference

How do i get my current location without GPS?

I want to get my current latitude and longitude using Mobile network provider, not GPS. AKA it should work without GPS with just your sim card. i have found many tutorials online claiming they find location with gps or network. however, they all seem to use GPS only! here or here and also here i don't want last knows location, as i don't wish to use GPS

Try This Code you can get current location without opening GPS
btnNWShowLocation.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
Location nwLocation = appLocationService
.getLocation(LocationManager.NETWORK_PROVIDER);
if (nwLocation != null) {
double latitude = nwLocation.getLatitude();
double longitude = nwLocation.getLongitude();
Toast.makeText(
getApplicationContext(),
"Mobile Location (NW): \nLatitude: " + latitude
+ "\nLongitude: " + longitude,
Toast.LENGTH_LONG).show();
} else {
showSettingsAlert("NETWORK");
}
}
});

Do it via Location Manager.
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
makeUseOfNewLocation(location);
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);

Get current latitude and longitude in the string

I am trying to get latitude and longitude but sometime network is available but I am not getting value of latitude and longitude. I am using MyLocationListener class and put condition all but some time value is not getting.
protected void showCurrentLocation()
{
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null)
{
counter++;
latitude=location.getLatitude();
longitude=location.getLongitude();
altitude=location.getAltitude();
}
}
private class MyLocationListener implements LocationListener
{
#Override
public void onLocationChanged(Location location)
{
counter++;
latitude=location.getLatitude();
longitude=location.getLongitude();
altitude=location.getAltitude();
}
#Override
public void onStatusChanged(String s, int i, Bundle b)
{
}
#Override
public void onProviderDisabled(String s)
{
}
#Override
public void onProviderEnabled(String s)
{
}
}

Here Best way to get Longitude Latitude:
/** PROCESS for Get Longitude and Latitude **/
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
longitude = String.valueOf(location.getLongitude());
latitude = String.valueOf(location.getLatitude());
Log.d("msg", "changed Loc : "+longitude + ":"+latitude);
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// check if GPS enabled
if(isGPSEnabled){
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(location != null)
{
longitude = String.valueOf(location.getLongitude());
latitude = String.valueOf(location.getLatitude());
Log.d("msg", "Loc : "+longitude + ":"+latitude);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
}else
{
/*
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setCostAllowed(true);
String provider = locationManager.getBestProvider(criteria, true);
*/
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if(location != null)
{
longitude = String.valueOf(location.getLongitude());
latitude = String.valueOf(location.getLatitude());
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
}else
{
longitude = "0.00";
latitude = "0.00";
}
}
}
if device is not able to get currentLocation using GPS then it'll be take fron NetworkProvider or else it'll take 0,0 as my requirement but you can modify as per your requirement
May it'll helpful to you.
Happy Coding :D

See, this is a very common problem. In order to have exact Latitude and Longitude ,You must use GPS also it must me activated on the mobile device but GPS too have some limitations. GPS works most efficiently under open sky. you will not have a clear range inside a building. So try your code under open sky and check the response.

Android 4.2 Location service issues

When I run my app on Android 4.2 OS phone, I can't seem to be able to get any values returned from getLAstKnownLocation ( always null )
The weird thing is that the Mapview works fine and it shows me my current location !!
Any ideas how to solve this issue ?
here is my code
in onCreate:
mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
provider = mlocManager.getBestProvider(criteria, false);
mlocManager.requestLocationUpdates(provider, 0, 0, geoHandler);
then the listener:
public class GeoUpdateHandler implements LocationListener {
public void onLocationChanged(Location location) {
// called when the listener is notified with a location update from the GPS
int lat = (int) (location.getLatitude() * 1E6);
int lng = (int) (location.getLongitude() * 1E6);
new GeoPoint(lat, lng);
Log.d(this.getClass().getSimpleName(), "onLocationChanged " + lat);
// mlocManager.removeUpdates(this);
}
public void onProviderDisabled(String provider) {
// called when the GPS provider is turned off (user turning off the GPS on the phone)
Log.d(TAG, "DISABLED");
}
public void onProviderEnabled(String provider) {
// called when the GPS provider is turned on (user turning on the GPS on the phone)
Log.d(TAG, "ENABLED");
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// called when the status of the GPS provider changes
Log.d(TAG, "CHANGED");
}
}

getLastKnownLocation will return a null when the provider is disabled. Or when there is no LastKnownLocation.
On the line: provider = mlocManager.getBestProvider(criteria, false);
your provider is asking for the BestProvider including disabled providers. Try using true at the end of the statement and see if that works.
http://developer.android.com/reference/android/location/LocationManager.html#getLastKnownLocation(java.lang.String)

getLastKnownLocation method always returns null

I have a problem to fixed position. I use getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
but always return null, i have set the permissions in your AndroidManifest.xml.
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
and enabled in Settings --> Location and Security --> location through network.
TextView locationShow = (TextView) this.findViewById(R.id.location);
double latitude = 0.0, longitude = 0.0;
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
else {
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
if (location != null) {
Log.i("SuperMap", "Location changed : Lat: " + location.getLatitude() + " Lng: " +
location.getLongitude());
}
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0,
locationListener);
Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
locationShow.setText("经度：" + latitude + "纬度：" + longitude);
I find that other apps can show the location correctly, so maybe there something wrong with my code.

getLastKnownLocation() give the last valid cached location.
You are trying to get the cached location from the Network Provider. You have to wait for a few minutes till you get a valid fix. Since the Network Provider's cache is empty, you are obviously getting a null there.

Unable to get latitude and longitude from android

getLastKnownLocation always return null value. I have enabled geo fix and gps on emulator. However, there is no gps signal on the notification bar when running this on emulator. May I know is there any mistake in my code? Thanks.
public void onCreate(Bundle savedInstanceState) {
LocationManager location = null;
super.onCreate(savedInstanceState);
setContentView(R.layout.near_layout);
location = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.NO_REQUIREMENT);
criteria.setPowerRequirement(Criteria.NO_REQUIREMENT);
String bestProvider = location.getBestProvider(criteria, true);
LocationListener ll = new mylocationlistener();
Location loc = location.getLastKnownLocation(bestProvider);
if(loc != null)
{
double latitude = loc.getLatitude();
double longitude = loc.getLongitude();
Toast.makeText(nearPlace.this, " nice" + latitude, Toast.LENGTH_LONG).show();
}else{
Toast.makeText(nearPlace.this, "Location not available. GPS is not enabled.", Toast.LENGTH_LONG).show();
}
location.requestLocationUpdates(bestProvider, 0, 0, ll);
}
private class mylocationlistener implements LocationListener {
#Override
public void onLocationChanged(Location location) {
Toast.makeText(nearPlace.this, " nice" + location.getLatitude(), Toast.LENGTH_LONG).show();
nearPlaceDownloaderTask getNearPlace = new nearPlaceDownloaderTask();
getNearPlace.execute(ANDROID_WEB_LINK + "gt.php?la=" + location.getLatitude() + "&lo=" + location.getLongitude());
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
}

The reason your code is not working, is because you have specified the following criteria:
criteria.setAccuracy(Criteria.NO_REQUIREMENT);
Android will prefer to use network location over GPS, because you don't care about the accuracy. By specifying an accuracy of 20 meters or so, it will probably automatically invoke GPS.
To manually invoke GPS location updates, override bestProvider:
bestProvider = LocationManager.GPS_PROVIDER;
You can really simplify this into two lines of code:
LocationManager locationManager =
(LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, interval,
precision, listener);
Don't forget to unregister your listener:
locationManager.removeUpdates(listener);

You might also want to check this out geofix not working
Also make sure you have mock locations allowed set in the emulator. Take a look at Pauls answer as well, which is why I was asking in comments what provider was returned