There is any solution to check if user disable GPS in settings?
I open my app, open top toolbar of android system, disable GPS and close this toolbar. In this moment I want to app check if status of GPS was changed.
I use check if GPS is active in onResume(), but this solution works only when user enable GPS, when disable onResume() is not called.
Any ideas?
Edit:
This is may class:
public class PrivacyActivity extends BaseActivity implements GpsStatus.Listener, LocationListener{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_privacy);
}
#Override
protected void onPause() {
super.onPause();
}
#Override
protected void onResume() {
super.onResume();
}
#Override
public void onGpsStatusChanged(int event) {
switch (event) {
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
Toast.makeText(this, "ads", Toast.LENGTH_LONG).show();
break;
case GpsStatus.GPS_EVENT_FIRST_FIX:
Toast.makeText(this, "ads1", Toast.LENGTH_LONG).show();
break;
}
}
#Override
public void onLocationChanged(Location location) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Toast.makeText(getApplicationContext(), "ads2", Toast.LENGTH_LONG).show();
}
#Override
public void onProviderEnabled(String provider) {
Toast.makeText(getApplicationContext(), "ads2", Toast.LENGTH_LONG).show();
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(getApplicationContext(), "ads2", Toast.LENGTH_LONG).show();
}
}
and when I disable gps I didn't see toast.
You can use the LocationListener class
// Acquire a reference to the system 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) {
Log.i("Example", "GPS is ON");
}
public void onProviderDisabled(String provider) {
Log.i("Example", "GPS is OFF");
}
};
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
You can get more info in http://developer.android.com/guide/topics/location/strategies.html
Reference the locationListener first.
LocationListener locationListener;
locationListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
LatLng myPlace = new LatLng(location.getLatitude(), location.getLongitude());
mMap.addMarker(new MarkerOptions().position(myPlace).title("me"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(myPlace));
mMap.animateCamera(CameraUpdateFactory.zoomTo(8.0f));
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
};
onProviderDisabled method will be fired if the user has disabled GPS from settings.
The intent inside the method will take the user to location settings directly.
Tested and works fine.
Related
I have an AsyncTask class that needs to get user's location when this AsyncTask is called.
The idea is to check if location service is enabled or not, if not, the location service toggle will popup for user to turn it on, then it will go back to the task to continue getting the location and finish the job.
However, the code below show NullPointerException on the line lat = location.getLatitude(); near the end of onPreExecute(). They said because getLastKnownLocation gets nothing as it's just been turned on a moment ago, then how can I get the location right after the location service has been turned on?
LocationManager locationManager;
LocationListener locationListener;
double lat;
double longi;
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
}
#Override
protected void onPreExecute() {
super.onPreExecute();
location = new Location(LocationManager.NETWORK_PROVIDER);
locationManager = (LocationManager) context.getSystemService(context.LOCATION_SERVICE);
if (!locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
context.startActivity(intent);
}
//I copy the part below from the internet but seems like "onProviderDisabled" and "onLocationChanged" were never be called
locationListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
Log.v("GPS CHECKKKKKKK",location.getLatitude()+"_"+location.getLongitude());
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
context.startActivity(intent);
}
};
locationManager.requestLocationUpdates("gps", 500, 0, locationListener);
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,5000,0, locationListener);
lat = location.getLatitude();
longi= location.getLongitude();
Log.v("GPS Cord CHECK",lat+"_"+longi);
}
#Override
protected String doInBackground(final Checkout_Package... params) {
//Doing the job that needs lat and longi value!
}
Thank you for your time!
You cannot create and put a location listener in onPreExecute() because the onChanged handlers will only be invoked much later when onPostExecute or even your AsyncTask has finished.
What you should do instead is start an AsyncTask in that location changed handler.
So in onLocationChanged().
With greenapps's suggest I figured it out. I put the code into the button that call the AsyncTask
checkout_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
LocationManager locationManager;
LocationListener locationListener;
gotit = false; //Boolean to start the AsyncTask only once.
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
locationListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
Log.v("GPS CHECKKKKKKK",location.getLatitude()+"_"+location.getLongitude());
lat = location.getLatitude();
longi = location.getLongitude();
if (gotit == false) {
new Checkout_Async(Checkout.this, listener).execute(new Checkout_Package(user, product_all, getTotalCost(product_all), fee, getTotalCost(product_all) + fee, lat, longi));
gotit = true;
pd.dismiss();
}
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
};
pd=ProgressDialog.show(Checkout.this,"",getResources().getString(R.string.please_wait),false);
locationManager.requestLocationUpdates("gps",50,0,locationListener);
}
});
Now it works. Thank you!
I have managed to get a fix on an android device's location (both with network provider and gps provider) using:
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
but i would like calculate the phones location at the same moment once using the NETWORK_PROVIDER and then the GPS_PROVIDER so that i can compare each accuracy together.
Does anyone know how to pinpoint the device once with NETWORK_PROVIDER and then with GPS_PROVIDER?
Use 2 Location Listeners
public class MainActivity extends Activity {
private Location networkLocation = null;
private Location gpsLocation = null;
private class NetworkLocationListener implements LocationListener {
#Override
public void onLocationChanged(Location location) {
// if you only want one location
// if (networkLocation == null)
networkLocation = location;
if (gpsLocation != null) {
// do something
}
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
#Override
public void onProviderEnabled(String provider) {}
#Override
public void onProviderDisabled(String provider) {}
}
private class GpsLocationListener implements LocationListener {
#Override
public void onLocationChanged(Location location) {
// if you only want one location
// if (gpsLocation == null)
gpsLocation = location;
if (networkLocation != null) {
// do something
}
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
#Override
public void onProviderEnabled(String provider) {}
#Override
public void onProviderDisabled(String provider) {}
}
}
I'm trying to get the devices location by getting all listeners:
LocationManager locationManager = (LocationManager) myContext.getApplicationContext()
.getSystemService(Context.LOCATION_SERVICE);
for (String s : locationManager.getAllProviders()) {
locationManager.requestLocationUpdates(s, checkInterval,
minDistance, new LocationListener() {
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onLocationChanged(Location location) {
// if this is a gps location, we can use it
if (location.getProvider().equals(
LocationManager.GPS_PROVIDER)) {
doLocationUpdate(location, true);
stopGPS();
}
}
#Override
public void onStatusChanged(String provider,
int status, Bundle extras) {
// TODO Auto-generated method stub
}
});
gps_recorder_running = true;
}
// start the gps receiver thread
gpsTimer.scheduleAtFixedRate(new TimerTask() {
#Override
public void run() {
Location location = getBestLocation();
doLocationUpdate(location, false);
if ((System.currentTimeMillis()-startMillis)>maxCheckTime){stopGPS();}
}
}, 0, checkInterval);
}
The problem comes when I want to stop the Listeners. I tried to cancel the timer:
gpsTimer.cancel();
But it doesn't stop the Listeners. I think I have to use locationManager.removeUpdates, but how do I stop all Listeners?
Thanks
You must keep a list of all the location listeners you register and then call unregister with each of them when you are done. Either that or just reuse the same listener for each call and then unregister it once.
Edit
//Make the following line a field in your class
List<LocationListener> myListeners = new ArrayList<LocationListener>();
for (String s : locationManager.getAllProviders()) {
LocationListener listener = new LocationListener() { .... }; //I'm cutting out the implementation here
myListeners.add(listener);
locationManager.requestLocationUpdates(s, checkInterval,
minDistance, listener);
}
There is the following code for getting current location:
final LocationManager manager=(LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener listener=new LocationListener() {
#Override
public void onLocationChanged(Location location) {
manager.removeUpdates(this);
Toast.makeText(MainActivity.this, "2", Toast.LENGTH_LONG).show();
if (location!=null) {
doSomeAction();
}
else {
Toast.makeText(MainActivity.this, LOCATION_IS_NULL_MESSAGE, Toast.LENGTH_LONG).show();
}
}
#Override
public void onProviderDisabled(String provider) {
manager.removeUpdates(this);
String newProvider=provider.equals(LocationManager.GPS_PROVIDER) ? LocationManager.NETWORK_PROVIDER : null;
if (newProvider==null) {
Toast.makeText(MainActivity.this, LOCATION_PROVIDERS_ARE_DISABLED_MESSAGE, Toast.LENGTH_LONG).show();
}
else {
manager.requestLocationUpdates(newProvider, 0, 0, this);
}
}
#Override
public void onProviderEnabled(String provider) {}
#Override
public void onStatusChanged(String provider, int status,
Bundle extras) {}
};
String provider=manager.isProviderEnabled(LocationManager.GPS_PROVIDER) ? LocationManager.GPS_PROVIDER :
LocationManager.NETWORK_PROVIDER;
Location location=manager.getLastKnownLocation(provider);
if (location!=null) {
doSomeAction();
}
else {
Toast.makeText(this, "1", Toast.LENGTH_LONG).show();
manager.requestLocationUpdates(provider, 0, 0, listener);
}
I see toast "1" each time, but I've never seen "2" toast, therefore my location isn't be updated. Please, tell me, I need to get my current location - how can I fix my problem? I use network location provider.
Did you actually attach the listener? With out attaching the listener its code is useless, but furthermore afaik: If the LocationManager has no Listener attached it will not update any location.
Try like this :
public class Locato extends Activity implements LocationListener {
LocationManager locman;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.idlayout);
locman = (LocatonManager) getSystemService(Context.LOCATION_SERVICE);
}
public void onStatusChanged(String pr, int s, Bundle a) {}
#Override
public void onProviderDisabled(String provider) {
Log.d("MyApp", "Provider disabled : " + provider);
}
#Override
public void onProviderEnabled(String provider) {
Log.d("MyApp", "Provider enabled : " + provider);
}
#Override
public void onLocationChanged(Location location) {
// do something
}
You must also add permissions to manifest : access coarse location and access fine location
I need to get my mobile current location using GPS programmatically.
How do I do that?
There is a complete explanation of how obtaining the current position in the training pages of the official android documentation.
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, gpsListener);
LocationListener gpsListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
//
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};