GPS Android - get positioning only once

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我寻月下人不归
我寻月下人不归 2020-12-01 06:03

Is there a way to access the GPS once instead of having a looper that constantly checks for location updates?

In my scenario all I\'m interested in is finding the cu

2条回答
  •  遥遥无期
    2020-12-01 07:02

    First check if the last know location is recent. If not, I believe you must to set up onLocationChanged listener, but once you get your first valid location you can always stop the stream of updates.

    Addition

    public class Example extends Activity implements LocationListener {
        LocationManager mLocationManager;
    
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
    
            mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    
            Location location = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            if(location != null && location.getTime() > Calendar.getInstance().getTimeInMillis() - 2 * 60 * 1000) {
                // Do something with the recent location fix
                //  otherwise wait for the update below
            }
            else {
                mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
            }
        }
    
        public void onLocationChanged(Location location) {
            if (location != null) {
                Log.v("Location Changed", location.getLatitude() + " and " + location.getLongitude());
                mLocationManager.removeUpdates(this);
            }
        }
    
        // Required functions    
        public void onProviderDisabled(String arg0) {}
        public void onProviderEnabled(String arg0) {}
        public void onStatusChanged(String arg0, int arg1, Bundle arg2) {}
    }
    

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