I need to listen when the user turns GPS on or off, and act upon that.
I understand this was available using the GPSStatus class, however that was deprecated.
How do I do this now?
You can use LocationListener !!
private class MyLocationListener implements LocationListener {
#Override
public void onLocationChanged(Location loc) {
Toast.makeText(
getBaseContext(),
"Location changed: Lat: " + loc.getLatitude() + " Lng: "
+ loc.getLongitude(), Toast.LENGTH_SHORT).show();
//handlePostion(loc);
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onProviderEnabled(String provider) {}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
}
And below how to use this listener
mLocationListener = new MyLocationListener();
mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
mLocationListener = new MyLocationListener();
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 5000, 10, mLocationListener);
And in on providerDisabled callback you can know when the GPS is off
Related
It is very simple.
But I see nothing appears on the logcat.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map_selection);
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.
if (location != null) {
double longitude = location.getLongitude();
double latitude = location.getLatitude();
Log.d("MapSelectionActivity", longitude + " " + latitude);
} else {
Log.d("MapSelectionActivity", "location unavailable");
}
}
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);
}
I am sure my phone is connected to a wifi access point, which enables the phone to access the internet.
First change the line below:
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
To:
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 5000, 0, locationListener);
Like it's said here:
public void requestLocationUpdates (String provider, long minTime, float minDistance, LocationListener listener, Looper looper)
...
minTime minimum time interval between location updates, in milliseconds
...
EDIT
I found this tutorial here, which has a simpler usage:
LocationListener locationListener = new MyLocationListener();
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 5000, 10, this.locationListener);
private final class MyLocationListener implements LocationListener {
#Override
public void onLocationChanged(Location locFromGps) {
// called when the listener is notified with a location update from the GPS
}
#Override
public void onProviderDisabled(String provider) {
// called when the GPS provider is turned off (user turning off the GPS on the phone)
}
#Override
public void onProviderEnabled(String provider) {
// called when the GPS provider is turned on (user turning on the GPS on the phone)
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// called when the status of the GPS provider changes
}
}
I am developing a small android application in which I want to find out the user's current location by using the network provider. I tried this in following ways but it's not giving me any output :
networklocationManager = (LocationManager) this
.getSystemService(Context.LOCATION_SERVICE);
// Define a listener that responds to location updates
LocationListener networklocationListener = new LocationListener() {
public void onLocationChanged(Location location) {
Log.i("********************************",
"this is my network location " + location);
String Location_text = "NETWORK LOCATION latitude:"
+ location.getLatitude() + " longitude:"
+ location.getLatitude();
network_location.setText(Location_text);
}
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
networklocationManager
.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
networklocationListener);
I gave permissions in my manifest file like this
<uses-permission
android:name="android.permission.INTERNET" />
<uses-permission
android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission
android:name="android.permission.ACCESS_FINE_LOCATION" />
Is there any thing which I am missing ? Is this the correct way? Need help. Thank you...
public class MainActivity extends Activity implements LocationListener {
private TextView latituteField;
private TextView longitudeField;
private LocationManager gpslocationManager;
private LocationManager networklocationManager;
private LocationManager networklocationManager1;
private String provider;
private TextView gps_location;
private TextView network_location;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gps_location = (TextView) findViewById(R.id.gps_location);
network_location = (TextView) findViewById(R.id.network_location);
networkLocation();
}
public void networkLocation() {
networklocationManager = (LocationManager) this
.getSystemService(Context.LOCATION_SERVICE);
LocationListener networklocationListener = new LocationListener() {
public void onLocationChanged(Location location) {
Log.i("********************************",
"this is my network location " + location);
String Location_text = "NETWORK LOCATION latitude:"
+ location.getLatitude() + " longitude:"
+ location.getLatitude();
network_location.setText(Location_text);
}
public void onStatusChanged(String provider, int status,
Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
networklocationManager
.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
networklocationListener);
}
}
Make sure you enable Location Services in Settings! That should be the problem. It might be disabled (and this setting will usually be found in Location and Security in Settings)
Let me know if it works!
Is your network provider enabled?
boolean network_enabled;
try {
network_enabled = locManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
} catch(Exception ex) {
ex.printStackTrace();
}
I hope this part of the code will help you extracted from vogella.
public class ShowLocationActivity 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.main);
latituteField = (TextView) findViewById(R.id.TextView02);
longitudeField = (TextView) findViewById(R.id.TextView04);
// Get the location manager
locationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the locatioin 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("Location not available");
longitudeField.setText("Location not available");
}
}
/* 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) {
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();
}
}
I am creating a service that periodically updates the position. but using the following code, it throws me:
runException Can't create handler inside thread that has not called Looper.prepare()
This code is running inside doInBackground of Async class in service
private void UpdatePosition()
{
locManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location =
locManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
showPosition(location);
locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
showPosition(location);
}
public void onProviderDisabled(String provider){
}
public void onProviderEnabled(String provider){
}
public void onStatusChanged(String provider, int status, Bundle extras){
Log.i("LocAndroid", "Provider Status: " + status);
}
};
locManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 15000, 0, locationListener);
}
I was reviewing several posts and found that request has to run in uithread, but do not know how or where to put it.
what can i do?
EDIT:
i'll add only this to my code and now isnt throw any error
private void UpdatePosition()
{
Looper.prepare();
looper = Looper.myLooper();
locManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location =
locManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
showPosition(location);
locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
showPosition(location);
}
public void onProviderDisabled(String provider){
}
public void onProviderEnabled(String provider){
}
public void onStatusChanged(String provider, int status, Bundle extras){
Log.i("LocAndroid", "Provider Status: " + status);
}
};
locManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 15000, 0, locationListener);
}
but i dont know if its correct..what do you say?
i use the following code for getting the current latitude and longitude in services but it always return null. please help me.
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
provider = locationManager.getBestProvider(criteria, false);
System.out.println("provider "+provider);
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
Try this code for current location:
LocationManager mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 10,
10, mlocListener);
public class MyLocationListener implements LocationListener {
public void onProviderDisabled(String provider)
{
AlertDialog.Builder dlgAlert = new AlertDialog.Builder(
VisualCV.this);
dlgAlert.setMessage("Gps Disabled ");
dlgAlert.setTitle("Message");
dlgAlert.setPositiveButton("OK", null);
dlgAlert.setCancelable(true);
dlgAlert.create().show();
}
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(), "Gps enabled", Toast.LENGTH_SHORT ).show();
}
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
public void onLocationChanged(Location loc)
{
// TODO Auto-generated method stub
Latitud = loc.getLatitude();
longtitude = loc.getLongitude();
lang = String.format("%.4f", longtitude);//LONGITUDE
lati = String.format("%.4f", Latitud);//LATITUDE
}
}
Use this piece of code may be it may help you
import com.example.ConfigClass;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
public class GpsListener {
public static GpsListener refrence = null ;
public LocationManager locationManager = null;
public LocationListener locationListener = null;
public Location location = null;
public static GpsListener getInstance(){
if(refrence == null){
refrence = new GpsListener();
}
return refrence;
}
public void startGpsCallBack(Context activityContext){
locationManager = (LocationManager) activityContext.getSystemService(Context.LOCATION_SERVICE);
locationListener = new mylocationlistener();
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
ConfigClass.latitudeValue = location.getLatitude();
ConfigClass.longitudeValue = location.getLongitude();
}
}
public class mylocationlistener implements LocationListener {
#Override
public void onLocationChanged(Location location) {
if (location != null) {
ConfigClass.latitudeValue = location.getLatitude();
ConfigClass.longitudeValue = location.getLongitude();
}
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
public void stopGpsCallBack(){
if (locationManager != null) {
locationManager.removeUpdates(locationListener);
}
}
public void startGpsCallbackAgain(Context activityContext){
locationManager = (LocationManager) activityContext.getSystemService(Context.LOCATION_SERVICE);
locationListener = new mylocationlistener();
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, 0, 0, locationListener);
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
ConfigClass.latitudeValue = location.getLatitude();
ConfigClass.longitudeValue = location.getLongitude();
}
}
}
This is my code
First startGpsCallBack, then stop it and then call startGPSCallBackAgain method
Check it and let me know if this solves your problem
Try this.
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/* Use the LocationManager class to obtain GPS locations */
LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
}
/* Class My Location Listener */
public class MyLocationListener implements LocationListener
{
public void onLocationChanged(Location loc)
{
loc.getLatitude();
loc.getLongitude();
String Text = "My current location is: " +
"Latitud = " + loc.getLatitude() +
"Longitud = " + loc.getLongitude();
Toast.makeText( getApplicationContext(), Text, Toast.LENGTH_SHORT).show();
}
public void onProviderDisabled(String provider)
{
Toast.makeText( getApplicationContext(), "Gps Disabled", Toast.LENGTH_SHORT ).show();
}
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(), "Gps Enabled", Toast.LENGTH_SHORT).show();
}
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
In my app, i need to create an android service to periodically get mobile user's current location(latitude and longitude). The service should get user's location in every 5 minutes.. How can i do this in android service that would run in background. And is this the right approach?
You can write a private/internal class(within your service) that implements locationListener and in the onStart meethod of your service you can requestLocationUpdates which will be listened by your listener
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
MyLocationListener listener = new MyLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, minTime, minDistance, listener);
LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, mlocListener);
}
public class MyLocationListener implements LocationListener
{
#Override
public void onLocationChanged(Location loc)
{
Log.i("**************************************", "Location changed");
loc.getLatitude();
loc.getLongitude();
String Text = "My current location is: " +"Latitude = " + loc.getLatitude() + "Longitude = " + loc.getLongitude();
Toast.makeText( getApplicationContext(), Text, Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderDisabled(String provider)
{
Toast.makeText( getApplicationContext(), "Gps Disabled", Toast.LENGTH_SHORT ).show();
}
#Override
public void onProviderEnabled(String provider)
{
Toast.makeText( getApplicationContext(), "Gps Enabled", Toast.LENGTH_SHORT).show();
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
You don't need a service to accomplish this. In order to get location every 5mins, in your app, on the activity you can implement the location listener. While setting up the location manager, you can specify the minTime = 5mins (300000 ms). The onlocationChanged method will be called every 5 mins or when the distance change > minDistance, which ever occurs first.
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
MyLocationListener listener = new MyLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 300000, minDistance, listener);