how to get gps location android
I am trying to have a constant gps listener that will send its location (long and lat coordinates) to a web server every x mins. On a button click it will also send its location to the webserver. I realize that to get the gps signal you type in how often to find a position, but how do I write a program that can get the gps location and send its coordinates every x mins (even in the background when not and by a button press?
//in the on click
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpda开发者_StackOverflow社区tes(
LocationManager.GPS_PROVIDER, whatshouldIputhere?, 0, this);
and
public void onLocationChanged(Location location) {
if (location != null) {
double lat = location.getLatitude();
double lng = location.getLongitude();
}
}
I've got this working:
private void _getLocation() {
// Get the location manager
LocationManager locationManager = (LocationManager)
getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String bestProvider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(bestProvider);
try {
lat = location.getLatitude();
lon = location.getLongitude();
} catch (NullPointerException e) {
lat = -1.0;
lon = -1.0;
}
}
It's simple. It gets the best available provider and gets its last known position.
If you want it only with the GPS, try this.
Hope it helps!
EDITED:
try this:
private void _getLocation() {
// Get the location manager
LocationManager locationManager = (LocationManager)
getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String bestProvider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(bestProvider);
LocationListener loc_listener = new LocationListener() {
public void onLocationChanged(Location l) {}
public void onProviderEnabled(String p) {}
public void onProviderDisabled(String p) {}
public void onStatusChanged(String p, int status, Bundle extras) {}
};
locationManager
.requestLocationUpdates(bestProvider, 0, 0, loc_listener);
location = locationManager.getLastKnownLocation(bestProvider);
try {
lat = location.getLatitude();
lon = location.getLongitude();
} catch (NullPointerException e) {
lat = -1.0;
lon = -1.0;
}
}
This code gets the last known location and then do a request for the actual location.
One method is to use Timer
and TimerTask
Timer timer = new Timer();
timer.scheduleAtFixedRate(new SendLocationTask(), 0, 60000);
class SendLocationTask extends TimerTask{
public abstract void run(){
// send position info here
}
}
There are various methods you could use. You could use a separate thread that waits for x minutes and then sends the latest known location to the server. Or you use a Service that does more or less the same. As a third possibility you could also use a Handler.
You can create a thread that will run in background and every x minutes you get the actual position by calling a function that does that (Note that you want to make a function that get the x,y coordinates since you will use that on button click aswel). For the code you posted :
locationManager.requestUpdates(provider, minTime, minDistance, intent);
That means that your application will send a request to gps module every x min for the whatshouldIputhere?
Good luck, Arkde
this code works for me (api 17)
try {
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
|| ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED)
{
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
lat = location.getLatitude();
lon = location.getLongitude();
}
}
catch (Exception e){
e.printStackTrace();
}
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