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get current location android

I have a problem with getting current location because, I have in my MainActivity the listener:
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MINIMUM_TIME_BETWEEN_UPDATE,
MINIMUM_DISTANCECHANGE_FOR_UPDATE,
new MyLocationListener()
);
And I have a second activity where I would, when i click on button, calculate distance from my location and gps coordinate that I will pass with distanceTo and return true if the distance is beetween 0 and 200.
So I have a function in SecondActivity
private boolean checkCoordinate(String gps) {
LocationManager lm = (LocationManager) getSystemService(App.getContext().LOCATION_SERVICE);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return false;
}
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
double currentLongitude = location.getLongitude();
double currentLatitude = location.getLatitude();
Location loc1 = new Location("");
loc1.setLatitude(currentLatitude);
loc1.setLongitude(currentLongitude);
String[] sep = gps.split(",");
double latitude = Double.parseDouble(sep[0]);
double longitude = Double.parseDouble(sep[1]);
Location loc2 = new Location("");
loc2.setLatitude(latitude);
loc2.setLongitude(longitude);
float distanceInMeters = loc1.distanceTo(loc2);
if(distanceInMeters < 200){
return true;
}else{
return false;
}
}
But the problem is that someTimes and maybe when I don't change my location the function:
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
return null, and I don't understand how know my current location because I have already set requestLocationUpdates.
so I how can know my current location?

getLastKnownLocation will return null if GPS based location is disabled in system or there was no GPS fix since system startup. If you want to ensure there is a location you can use the requestSingleUpdate-method, it will not return until there is a location available.
It might also be a good idea to not use the APIs based on specific provider name if it's not important to use a specific provider (usually it is not important how you got the location). The API contains methods that take a Criteria-object instead of a provider name and you can define very precisely what accuracy level etc. you want.

How to detect A-GPS in device?

I am working on an application in which latitude and longitude of the device is required. I have used GPS Provider to get latitude and longitude and it works fine, but when I checked my app on HTC Desire 816 which has Android v4.4.2 (KitKat), its not working. It always shows GPS is disable.
This device has Assisted GPS (A-GPS) and GLONASS, this is available in many latest devices. My question is how can I detect A-GPS through my code as code for standalone GPS is not working for A-GPS.
Method for getting latitude & longitude:
public Location getLocation() {
try {
locationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
this.canGetLocation = true;
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}

Android LocationManager network provider returns null

I wanted to get my GPS coordinates using Android App. I started developing, and I can get GPS coordinates, but they are not accurate. I wanted to use NETWORK_PROVIDER, but the Location by this provider is always null. More interesting, isProvicerEnabled returns true.
I used example from this thread (best answer)
enter link description here
private void _getLocation() {
// Get the location manager
try {
boolean isGPSEnabled = false;
boolean isNetworkEnabled = false;
locationManager = (LocationManager) getApplicationContext().getSystemService(LOCATION_SERVICE);
Location location = null;
double latitude = -1;
double longitude = -1;
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
if (isNetworkEnabled) {
showToast("network");
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
1000,
0, this);
Log.d("Network", "Network Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
else if (isGPSEnabled) {
showToast("gps");
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
1000,
0, this);
Log.d("GPS", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
showToast("" + latitude + longitude);
} catch (Exception e) {
e.printStackTrace();
}
I have all the permissions in manifest
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
I know the code is dirty, but for now it's only for testing. Do I miss something? I found similar examples in many places, and it seems pretty straight, so I am a little confused.
My phone works ok, GPS and network works fine. For example Google Maps application I have works well. Any suggestions?

Please do NOT use this code. It's bad. It has a lot of errors. Also, getLastKnownLocation will return null if it doesn't have a location yet. Which it always will if nobody on the phone is using requestUpdates.
Your code is taken from a class that was posted on a very old thread on here called GPSTracker. I've been trying to kill that code for months- it causes far more problems than it helps. If you want better example code, try http://gabesechansoftware.com/location-tracking/ which is a blog post I wrote about how bad that code is. It will show you the correct way to do it, and explains some of what's wrong with that code.

Android - getting GPS coordinates on service thread

I've been working on an application that tracks a users GPS coordinates and intermittently sends updates to my server. This is done in a thread within a service. Most of the time the first reading will be accurate but when moving the GPS is not updating. I think this is because the LocationManager takes some time to warm up. The location setting on the device will also affect the outcome (Device only, high accuracy), sometimes resulting with 0.0 being returned. Is there a simple solution that will allow it enough time before the values are decided upon?
Service thread:
new Thread() {
public void run() {
// prepare looper
Looper.prepare();
// send text messages
String numbersList = helper.getNumbers();
if (numbersList != "") {
String numbersArray[] = numbersList.split(", ");
for (int i = 0; i < numbersArray.length; i++) {
sendSMS(numbersArray[i], incident_id);
}
}
// run until told otherwise
while (active == true) {
// check if GPS enabled
if (gps.canGetLocation()) {
latitude = gps.getLatitude();
longitude = gps.getLongitude();
accuracy = gps.getAccuracy();
} else {
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
GPS Tracker Class:
public Location getLocation() {
try {
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
this.canGetLocation = true;
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
else if(isNetworkEnabled) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}

Your first location always is the last known location (locationManager.getLastKnownLocation(...)). This location may be relativly old, for example the last fix of the GPS before it was turned off or before you entered a building. Its accurracy in relation to your current location is more or less random (unless you did not move or left the building using the same door).
If the GPS was turned off or the satellites were not visible for a while (e.g. inside a building) the hardware will need some time to get a fix on the current location. This is the delay you are seeing. Afterwards your location listener (not shown above) will get updates from the GPS.

Google Maps - Location keeps jumping between my real location and 0.6 miles away (Random place)

I've got Google Maps v2 running on my app, using a service to get the users location. Problem is the location keeps changing. It shows my real location for a bit, then jumps to a random location that I've never been to before.
I'm check GPS/Network lat/lng via the service and calling them in my maps class, where I then animate the camera to move to my location. I don't really know what's wrong, or where to start with this one.
Does anyone know what sort of problem this is? It's baffling to me.
I don't really know what code to post. The accuracy of the location via network is 1121m where as the accuracy of the location via GPS is around 31. I'm using a LocationListener and in the onLocationChanged is says it's using my network location, suddenly the accuracy improves, to 29m, then it suddenly goes back up to 1121m. This happens about every minute or so. Very odd behaviour. With GPS enabled, shouldn't that be the preferred choice anyway? Is there a way to set it to my preferred choice once it gets a fix?
My service gets it's information like this:
public Location getLocation() {
Log.i("getLocation", "Get location called");
try {
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
//Getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
//Getting network status
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled and GPS is off.
Log.d("NOT ENABLED", "PASSIVE PROVIDER");
locationManager.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
loc = locationManager.getLastKnownLocation(LocationManager.PASSIVE_PROVIDER);
if (loc != null) {
latitude = loc.getLatitude();
longitude = loc.getLongitude();
Log.i("PASSIVE_LOCATION", "Location: "+loc.toString());
}
}
else {
this.canGetLocation = true;
if (isNetworkEnabled) {
Log.d("Network", "Network");
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
loc = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (loc != null) {
latitude = loc.getLatitude();
longitude = loc.getLongitude();
Log.i("NETWORK_LOCATION", "Location: "+loc.toString());
}
}
if (isGPSEnabled) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
loc = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (loc != null) {
latitude = loc.getLatitude();
longitude = loc.getLongitude();
Log.i("GPS_LOCATION", "Location: "+loc.toString());
}
}
}
}
catch (Exception e) {
e.printStackTrace();
}
//check provider & accuracy
Log.d("PROVIDER", loc.getProvider());
Log.d("ACCURACY", Float.toString(loc.getAccuracy()));
return loc;
If anyone could help I would really appreciate it. Thank you in advance.

I think this solved itself. It was jumping between locations simply because of accuracy. Once GPS accuracy was better than network, it started updating via GPS.
I'm also stopping location updates once the accuracy is less than 30 in onLocationChanged so I have a bit more control and don't waste the users battery.