How to stop location manager?

问题:

Don't know why, but sometimes LocationManager is still working also after closing application.

I call startGPS() in onCreate-Methode in one Activity (only one, let me call it StartActivity).

protected void startGPS()
{    
 try
 {           
     lmanager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
     lmanager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
     lmanager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
 }
 catch(Exception e)
 {
     e.printStackTrace();
 }
}

And if this activity will be destroyed (so, when application will be closed), I call endGPS()

public void endGPS()
{

 try
 {           
     lmanager.removeUpdates(this);
     lmanager=null;
 }
 catch(Exception e)
 {
  e.printStackTrace();
 }
}

Some ideas, some suggestions, what have I done wrong?!

回答1:

Is it possible your activity isn't being destroyed? i.e.: you hit the home button. Move your gps start/stop to onStart and onPause.

回答2:

You should call the method removeUpdates inside the method onPause:

@Override
protected void onPause() {
    super.onPause();
    locationManager.removeUpdates(this);
    Log.i(TAG, "onPause, done");
}

回答3:

The emulator never gets rid of the GPS icon once loaded. Hence, on an emulator, you cannot use the GPS icon as a test as to whether GPS is still running. On a device, though, the icon should vanish.

Should I use two different listeners?

I sure would. I do not know whether removeUpdates() will remove both, or even if both requests are registered with the single listener.

回答4:

I see it´s been a while since this post, but maybe it would help some body else. I use: removeUpdates(this), because my listener it´s the activity where I implement de location manager, you need to indicate your listener.

回答5:

I use: locationManager.removeUpdates(locationListener); Its Working

    @Override
protected void onPause() {
    super.onPause();
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        // TODO: Consider calling
        //    ActivityCompat#requestPermissions
        // here to request the missing permissions, and then overriding
        //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
        //                                          int[] grantResults)
        // to handle the case where the user grants the permission. See the documentation
        // for ActivityCompat#requestPermissions for more details.
        return;
    }


    locationManager.removeUpdates(locationListener);
}