How to use locationManager?

How to use locationManager? - android

I try to add a location from the GPS but i always get null. Can you please help and show me what I did wrong?
I would like to always receive the location in onCreate. If no location is received
"No provider received" appears instead of the location. The problem is i always get the message.
//Location variables
private TextView gps;
private LocationManager locationManager;
private String locationProvider;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_upload_draw);
initializeData();
}
private void initializeData()
{
gps = (TextView) findViewById(R.id.GPS);
locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locationProvider = locationManager.getBestProvider(new Criteria(), true);
if(locationProvider!=null)
{
gps.setText("Upload image location: "+ locationProvider);
}
else
{
gps.setText("Upload image location: No provider Found" );
}
}
#Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
private void showLocation(Location location)
{
if(location==null)
gps.append("\nUnknown location");
else
{
double lat = location.getLatitude();
double lng = location.getLongitude();
gps.append("\n\nLocation lat: " +lat+
", long: " + lng+"\n"
+ getAddress(lat, lng));
}
}
public void onLocationChanged(Location location) {
showLocation(location);
}
public void onProviderDisabled(String provider) {
gps.append("\nProvider Disabled: " +provider);
}
public void onProviderEnabled(String provider) {
gps.append("\nProvider Enabled: " +provider);
}
public void onStatusChanged(String provider, int status, Bundle extras) {
gps.append("\nProvider Status Changed: " + provider+ ",status: "+
status);
}
public String getAddress(double lat, double lng)
{
Geocoder geocoder = new Geocoder(this);
try {
List<Address> addresses = geocoder.getFromLocation(lat, lng, 1);
Address obj = addresses.get(0);
String str = obj.getCountryName();
str+="\n" + obj.getCountryCode();
str+="\n" + obj.getLocality(); //current city
str+="\n" + obj.getAddressLine(0);
return str;
}
catch (IOException e) {
return "Error: " +e.getMessage();
}
}

1)You need to request updates from provider:
newLocation = requestUpdatesFromProvider(
LocationManager.GPS_PROVIDER, "error string");
2)Register a Listener:
LocationListener listener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
//Do something
} );}

Related

Change position GPS and TextView when phone is lock

I want to create app which will add new longitude and latitude every 3 second to the textview in scrollview. I have a problem with adding new coordinates when the phone is locked or app work in background
public class PomiarTrasy extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pomiar_trasy);
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (lm.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
txt1.setText("Szukanie pozycji...");
} else {
txt1.setText("Twój GPS jest wyłączony");
}
if (lm.isProviderEnabled(LocationManager.GPS_PROVIDER))
txt1.setText("Szukanie pozycji...");
else
txt1.setText("Twój GPS jest wyłączony");
}
LocationManager lm;
Location savedLocation = null;
LocationListener locationListener = new LocationListener() {
#SuppressLint("MissingPermission")
#Override
public void onLocationChanged(Location location) {
String latitude = "";
String longitude = "";
if (location != null) {
latitude += location.getLatitude();
longitude += location.getLongitude();
txt1.setText("Uzyskano współrzędne!");
}
btn_start_zapis.setEnabled(true);
if (wlacz == 1) {
txt4.setText(txt4.getText() + "" + location.getLongitude() + ", " + location.getLatitude() + "\n");
txt5.setText(txt2.getText());
txt6.setText(txt3.getText());
txt2.setText(latitude);
txt3.setText(longitude);
}
if (savedLocation == null) {
savedLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
}
}
#Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
#Override
public void onProviderEnabled(String s) {
txt1.setText("Szukanie pozycji...");
}
#Override
public void onProviderDisabled(String s) {
txt1.setText("Twój GPS jest wyłączony");
}
};
Any sugestion how I can do it? I read about the Service - GPS work in background, but how do it with TextView?

Not getting latitude and longitude in textview

I am working with a project to get latitude and longitude and also send that lat and long to my server. But I didn't get the latitude and longitude. I cannot find out where the error occur.
private String Tag="MainActivity";
String lat="", lon="";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btnLocation = (Button)findViewById(R.id.btnLocation);
btnLocation.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) AddressActivity.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.
lat = Double.toString(location.getLatitude());
lon = Double.toString(location.getLongitude());
TextView tv = (TextView) findViewById(R.id.txtLoc);
tv.setText("Your Location is:" + lat + "--" + lon);
}
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);
}
});
Button btnSend = (Button)findViewById(R.id.btnSend);
btnSend.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
postData(lat, lon);
}
});
}
public void postData(String la, String lo) {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpGet htget = new HttpGet("http://192.168.1.2/.../"+la+"/"+lo);
try {
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(htget);
String resp = response.getStatusLine().toString();
Toast.makeText(this, resp, Toast.LENGTH_SHORT).show();
} catch (ClientProtocolException e) {
Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show();
}
}

Get lastKnowLocation from provider - GPS:
LocationManager locationManager = (LocationManager) AddressActivity.this.getSystemService(Context.LOCATION_SERVICE);
Location gpsLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
You parsing of String from Double is incorrect, Try to parse:
lat = String.valueOf(location.getLatitude());
lon = String.valueOf(location.getLongitude());
tv.setText("Your Location is:" + lat + "--" + lon);

try to use
lat = String.valueOf(location.getLatitude());
lon = String.valueOf(location.getLongitude());
instead
lat = Double.toString(location.getLatitude());
lon = Double.toString(location.getLongitude());
Hope this vl work for you :-)

how do I update the latitude and longitude to the textview in android main activity having dependency injection with dagger 2

I am beginner in android. I am now learning dagger 2 dependency injection. I am coding an app which update the latitude and longitude to the textview screen. I don't know, how i would I update the location coordinates to the textview screen as i did the coding of onLocationChanged in the module class and I am injecting the class to the main activity.
I did the coding of getting the location update in LocationManager class.
I can show the updated coordinates using toast, but not able to change textview, is there any way to do this ?
The code in the main activity
public class MainActivity extends AppCompatActivity {
#Inject
LocationManager locationManager;
#InjectView(R.id.textView2)
TextView addressLocation;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.inject(this);
MyApplication.inject(this);
locationManager.GetLocation();
}
}
I like to update the addressLocation textview with the coordinates that i am getting from LocationListener.
package com.test.xyz.daggersample1.service.impl;
public class LocationManager {
Geocoder geocoder;
List<Address> addresses;
private double lattitude = 0;
private double longitude = 0;
private Context context;
public LocationManager(Context context) {
this.context = context;
}
public String GetLocation() {
final String[] address = new String[1];
android.location.LocationManager locationManager = (android.location.LocationManager) context.getSystemService(LOCATION_SERVICE);
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return "";
}
geocoder = new Geocoder(context, Locale.getDefault());
LocationListener listener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
longitude = location.getLongitude();
lattitude = location.getLatitude();
// dialog.dismiss();
Toast.makeText(context, "Got the Longitude as " + longitude + " Lattitude as " + lattitude, Toast.LENGTH_SHORT).show();
**I like to pass these location values to the textview in the main activity**
try {
addresses = geocoder.getFromLocation(lattitude, longitude, 1);
address[0] = addresses.get(0).getAddressLine(0);
} catch (IOException e) {
e.printStackTrace();
}
Toast.makeText(context, "Got the Longitude as " + longitude + " Lattitude as " + lattitude, Toast.LENGTH_SHORT).show();
}
#Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
#Override
public void onProviderEnabled(String s) {
}
#Override
public void onProviderDisabled(String s) {
Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
context.startActivity(i);
}
};
locationManager.requestLocationUpdates(android.location.LocationManager.GPS_PROVIDER, 2000, 10, listener);
return address[0];
}
}
My project folder

Using Google Play location API in a seperated class?

In the Android Developer guide, Google showed how to use the Google Play Services API in an activity class. What is the best way to offload the API calls into a separate class?
public class GPSresource implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
private Location location; // location
private double latitude; // latitude
private double longitude; // longitude
private GoogleApiClient mGAC;
private Context mContext;
public static final String TAG = "GPSresource";
public GPSresource(Context c)
{
mContext = c;
try {
buildGoogleApiClient();
mGAC.connect();
}
catch(Exception e)
{
Log.d(TAG,e.toString());
}
}
protected synchronized void buildGoogleApiClient() {
mGAC = new GoogleApiClient.Builder(mContext)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude() {
if (location != null) {
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
#Override
public void onConnected(Bundle bundle) {
location = LocationServices.FusedLocationApi.getLastLocation(mGAC);
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
}
The code I wrote above does not work since onConnected is never called since this is not an activity. Is there a better way to separate the GPS services from the Main Activity or is that the only option(If so, is there a reason as to why?) Perhaps making a thread in the main activity to run in the background?
Thanks!

onConnected is called, I made a mistake with reading the logs!

Here is an example :
public class LocationManager implements LocationListener {
private LocationManager locationManager;
public LocationManager()
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if (locationManager.getAllProviders().contains(LocationManager.GPS_PROVIDER))
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
if (locationManager.getAllProviders().contains(LocationManager.NETWORK_PROVIDER))
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
Location mobileLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (mobileLocation != null)
{
onLocationChanged(mobileLocation);
}
Location netLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (netLocation != null)
{
onLocationChanged(netLocation);
}
}
#Override
public void onLocationChanged(Location loc) {
String longitude = "Longitude: " + loc.getLongitude();
//Log.v(TAG, longitude);
String latitude = "Latitude: " + loc.getLatitude();
// Log.v(TAG, latitude);
/*------- To get city name from coordinates -------- */
String cityName = null;
Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
List<Address> addresses;
try {
addresses = gcd.getFromLocation(loc.getLatitude(),
loc.getLongitude(), 1);
// Log.e(TAG, "addr : " + addresses.toString());
if (addresses.size() > 0)
cityName = addresses.get(0).getLocality();
}
catch (IOException e) {
e.printStackTrace();
}
String s = longitude + "\n" + latitude + "\n\nMy Current City is: " + cityName;
Log.e(TAG, "location : " + s);
}
#Override
public void onProviderDisabled(String provider) {
Log.d("Latitude", "disable");
}
#Override
public void onProviderEnabled(String provider) {
Log.d("Latitude","enable");
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.d("Latitude","status");
}
public void pause() {
if (locationManager != null)
{
locationManager.removeUpdates(this);
locationManager = null;
}
}
public void destroy() {
if (locationManager != null)
{
locationManager.removeUpdates(this);
locationManager = null;
}
}
}

Cannot get current location coordinates

I want to get current longitude and latitude as int
So I use this code
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, this);
Location location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
try {
gps_enabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
} catch (Exception ex) {
}
try {
network_enabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch (Exception ex) {
}
// don't start listeners if no provider is enabled
if (!gps_enabled && !network_enabled) {
....Notify
}
if (gps_enabled) {
if (location != null) {
longitude =(int) (location.getLongitude()*1e6);
latitude = (int) (location.getLatitude()*1e6);
String accuracy = "Accuracy: " + location.getAccuracy();
}
}
if (network_enabled) {
if (location != null) {
longitude =(int) (location.getLongitude()*1e6);
latitude = (int) (location.getLatitude()*1e6);
String accuracy = "Accuracy: " + location.getAccuracy();
}
}
locationManager.removeUpdates(this);
Unfortunately longitude and latitude are always null.
I have all permission needed in the manifest.
How can I fix this issue?

Well this is what i use for location listener
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
public class LocationUtils implements LocationListener{
Context context;
private String provider;
private LocationManager locationManager;
private String latitude="no value";
private String longitude="no value";
public LocationUtils(Context context) {
this.context=context;
// Get the location manager
locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the locatioin provider -> use
// default
latitude="no value";
longitude="no value";
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(provider);
// Initialize the location fields
if (location != null) {
/*Toast.makeText(context, "Provider " + provider + " has been selected.",
Toast.LENGTH_SHORT).show();*/
// System.out.println("Provider " + provider + " has been selected.");
onLocationChanged(location);
} else {
/*Toast.makeText(context, "Location not available",
Toast.LENGTH_SHORT).show();*/
}
}
#Override
public void onLocationChanged(Location location) {
double lat = (double) (location.getLatitude());
double lng = (double) (location.getLongitude());
latitude = lat + "";
longitude = lng + "";
/* Toast.makeText(context, " lat: "+lat +" Long:"+lng,
Toast.LENGTH_SHORT).show(); */
}
#Override
public void onProviderDisabled(String provider) {
//Toast.makeText(context, "Disabled provider " + provider,
// Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderEnabled(String provider) {
//Toast.makeText(context, "Enabled new provider " + provider,
// Toast.LENGTH_SHORT).show();
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
public String getLatitude() {
return latitude;
}
public String getLongitude() {
return longitude;
}
}
Now in your activity u can get
LocationUtils appLocationManager = new LocationUtils(getContext());
String latitude = appLocationManager.getLatitude();
String longitude = appLocationManager.getLongitude();
Also add
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
in your manifest file

First check the GPS enabled in your device.
Check all the permissions included in the manifest
You are fetching the last known location using the GPS provider so remove that line and fetch the location individually for both the provider(There should be possible that your GPS is not available at that time so you did not get the location and you are fetching the last known location using the GPS so it can be null and if location will be null then it will not goes inside the conditions like if(network_enabled) and if(gps_enabled).).
In short check the Last known location of GPS if it is null then try to get the location using the Location provider and use that location.

public class SMS_Service extends Service {
private final String LOGTAG = "SMS_Service";
String latLongString;
String addressString;
double altitude;
int LAC;
int mcc = 0;
int mnc = 0;
String pn_no;
Altitude_Details ld = new Altitude_Details();
#Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
#Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
Log.e(LOGTAG, "created");
}
#Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
Log.e(LOGTAG, "destroyed");
}
#Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
Log.e(LOGTAG, "started");
SmsManager sms = SmsManager.getDefault();
// get phone number from shared preference
SharedPreferences default1 = getSharedPreferences("Device",
MODE_WORLD_WRITEABLE);
pn_no = default1.getString("Phone_NO", "");
Log.e("phone_no in sms service", pn_no);
String From = intent.getStringExtra("From");
String Msg = intent.getStringExtra("Msg"); // get message from intent
Log.e("ON start:", "" + From);
Log.e("ON start:", "" + Msg);
String number = From.substring(7, 11);
Log.e("ON start: SUBSTRING", "" + number);
// check msg for Location keyword match or not
if (Msg.equals("LOCATION") && pn_no.equals(number)) {
Log.e("location:", "Location found");
TelephonyManager tel = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
String networkOperator = tel.getNetworkOperator();
// find MNC and MCC
if (networkOperator != null) {
mcc = Integer.parseInt(networkOperator.substring(0, 3));
mnc = Integer.parseInt(networkOperator.substring(3));
Log.e("MCC", "" + mcc);
Log.e("MNC", "" + mnc);
}
// find LAC for GSM
if (tel.getPhoneType() == TelephonyManager.PHONE_TYPE_GSM) {
final GsmCellLocation location = (GsmCellLocation) tel
.getCellLocation();
if (location != null) {
LAC = location.getLac();
Log.e("cell location", "LAC: " + location.getLac()
+ " CID: " + location.getCid());
}
}
LocationManager locationManager;
String context = Context.LOCATION_SERVICE;
locationManager = (LocationManager) getSystemService(context);
String provider = LocationManager.GPS_PROVIDER;
Location location = locationManager.getLastKnownLocation(provider);
// update method return latest location
updateWithNewLocation(location);
// location change then listner called
locationManager.requestLocationUpdates(provider, 2000, 10,
locationListener);
// send mcc,mnc,latitude,longitude,altitude,address,Link in message
String Url = "http://itouchmap.com/latlong.html";
sms.sendTextMessage(pn_no, null, "\nLocation:\n" + "MCC: " + mcc
+ "\nMNC: " + mnc + "\nLAC:" + LAC + latLongString
+ "\nAltitude:" + altitude + "feet"
+ "\nGo to Below site:\n" + Url, null, null);
sms.sendTextMessage(pn_no, null, "\nAddress:\n" + addressString,
null, null);
// stop service automatically
SMS_Service.this.stopSelf();
}
else {
Log.e("loation:", "Location not found");
SMS_Service.this.stopSelf();
}
}
private final LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
updateWithNewLocation(location);
}
public void onProviderDisabled(String provider) {
updateWithNewLocation(null);
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
private void updateWithNewLocation(Location location) {
// TODO Auto-generated method stub
addressString = "\nno address found";
// check location get or not from provider
if (location != null) {
// get latitude and longitude
double latitude = location.getLatitude();
double longitude = location.getLongitude();
latLongString = "\nLat:" + latitude + "\nLong:" + longitude;
Log.e("location", "" + latLongString);
// get altitude from method
altitude = ld.getElevationFromGoogleMaps(latitude, longitude);
Log.e("Altitude", "" + altitude);
// find address from latitude and longitude
Geocoder gc = new Geocoder(this, Locale.getDefault());
try {
List<Address> addresses = gc.getFromLocation(latitude,
longitude, 1);
StringBuilder sb = new StringBuilder();
if (addresses.size() > 0) {
Address address = addresses.get(0);
for (int i = 0; i <= address.getMaxAddressLineIndex(); i++)
sb.append(address.getAddressLine(i)).append("\n");
}
addressString = sb.toString();
Log.e("Address", "" + addressString);
} catch (IOException e) {
}
} else {
latLongString = "\n No location found";
Log.e("location", "" + latLongString);
}
}
}
hey you can make the service and use this code to get altitude and latitude and decode this using class

Try This code
double longitude,latitude;
int lon,lat;
getcurrentloc.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
Toast.makeText(GpsLocationFinder.this, "Enable Your GPS", Toast.LENGTH_LONG).show();
}else{
LocationResult locationResult=new LocationResult() {
#Override
public void gotLocation(Location location) {
// TODO Auto-generated method stub
longitude=location.getLongitude();
latitude=location.getLatitude();
lon=(int)longitude;
lat=(int)latitude;
Toast.makeText(GpsLocationFinder.this, "Current Longitude"+longitude+" Current Latitude"+latitude,Toast.LENGTH_LONG).show();
}
};
MyLocation myLocation = new MyLocation();
myLocation.getLocation(GpsLocationFinder.this, locationResult);
}
}
});
And the MyLocation Class is Below
public class MyLocation {
Timer timer1;
LocationManager lm;
LocationResult locationResult;
boolean gps_enabled=false;
boolean network_enabled=false;
double longitude,latitude;
public boolean getLocation(Context context, LocationResult result)
{
//I use LocationResult callback class to pass location value from MyLocation to user code.
//Log.e("GPS DISTANCE","GPS Enabled");
locationResult=result;
if(lm==null)
lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
//exceptions will be thrown if provider is not permitted.
//don't start listeners if no provider is enabled
//try{
try{
gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
}catch(Exception ex){
}
try{
network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
}catch(Exception ex){
}
if(!gps_enabled && !network_enabled){
return false;
}
if(gps_enabled){
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 100, 100, locationListenerGps);
}
if(network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
timer1=new Timer();
timer1.schedule(new GetLastLocation(), 30000);
return true;
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerNetwork);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
LocationListener locationListenerNetwork = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerGps);
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
class GetLastLocation extends TimerTask {
#Override
public void run() {
lm.removeUpdates(locationListenerGps);
lm.removeUpdates(locationListenerNetwork);
Location net_loc=null, gps_loc=null;
if(gps_enabled)
gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(network_enabled)
net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//if there are both values use the latest one
if(gps_loc!=null && net_loc!=null){
if(gps_loc.getTime()>net_loc.getTime())
locationResult.gotLocation(gps_loc);
else
locationResult.gotLocation(net_loc);
return;
}
if(gps_loc!=null){
locationResult.gotLocation(gps_loc);
return;
}
if(net_loc!=null){
locationResult.gotLocation(net_loc);
return;
}
locationResult.gotLocation(null);
}
}
public static abstract class LocationResult{
public abstract void gotLocation(Location location);
}
}

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

How to use locationManager? - android

1)You need to request updates from provider: newLocation = requestUpdatesFromProvider( LocationManager.GPS_PROVIDER, "error string"); 2)Register a Listener: LocationListener listener = new LocationListener() { #Override public void onLocationChanged(Location location) { //Do something } );}

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