android - GPS doesn't update -

good evening everyone,

i'm doing application values of different sensors accelerometer, proximity sensor, compass , gps, values i'm going use robotics project. yet, have problem gps doesn't update when change location without closing activity. indeed, if stop application , restart @ place, coords correct, that's problem of updating. please notice location being recalculated when screen change orientation (landscape -> portrait). work without touching anything, hehe.

so here code :

package com.pindus.sensors;  import android.app.activity; import android.content.context; import android.hardware.sensor; import android.hardware.sensorevent; import android.hardware.sensoreventlistener; import android.hardware.sensormanager; import android.location.location; import android.location.locationlistener; import android.location.locationmanager; import android.os.bundle; import android.widget.textview;  public class sensors extends activity implements sensoreventlistener{  sensormanager sm; locationmanager lm; locationlistener ls; @override public void oncreate(bundle savedinstancestate)  {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main);      sm = (sensormanager) getsystemservice(sensor_service);     lm = (locationmanager)getsystemservice(context.location_service);      boolean accelsupported = sm.registerlistener(this, sm.getdefaultsensor(sensor.type_accelerometer),sensormanager.sensor_delay_fastest);      if(!accelsupported)     {         sm.unregisterlistener(this, sm.getdefaultsensor(sensor.type_accelerometer));         ((textview)findviewbyid(r.id.acc)).settext("accéléromètre non disponible");     }      boolean compasssupported = sm.registerlistener(this, sm.getdefaultsensor(sensor.type_orientation),sensormanager.sensor_delay_fastest);      if(!compasssupported)     {         sm.unregisterlistener(this, sm.getdefaultsensor(sensor.type_orientation));         ((textview)findviewbyid(r.id.compass)).settext("boussole non disponible");     }      boolean proxysupported = sm.registerlistener(this, sm.getdefaultsensor(sensor.type_proximity),sensormanager.sensor_delay_fastest);      if(!proxysupported)     {         sm.unregisterlistener(this, sm.getdefaultsensor(sensor.type_proximity));         ((textview)findviewbyid(r.id.proxy)).settext("capteur de proximité non disponible");     }      ls = new mylocationlistener();       lm.requestlocationupdates( locationmanager.network_provider, 0, 0, ls);  }  @override public void onstop() {     super.onstop();     lm.removeupdates(ls);     sm.unregisterlistener(this); }  @override public void onpause() {     super.onstop();     lm.removeupdates(ls);     sm.unregisterlistener(this); }    @override public void onaccuracychanged(sensor sensor, int accuracy)  {     // todo auto-generated method stub  }  @override public void onsensorchanged(sensorevent event)  {     switch(event.sensor.gettype())     {         case sensor.type_accelerometer:             onaccelchanged(event);         break;          case sensor.type_orientation:             oncompasschanged(event);         break;          case sensor.type_proximity:             onproxychanged(event);         break;       }  }  public void onaccelchanged(sensorevent event) {     float ax,ay,az;      ax = event.values[0];     ay = event.values[1];     az = event.values[2];      ((textview)findviewbyid(r.id.axex)).settext("axe x : " + ax);     ((textview)findviewbyid(r.id.axey)).settext("axe y : " + ay);     ((textview)findviewbyid(r.id.axez)).settext("axe z : " + az);  }  public void oncompasschanged(sensorevent event) {     float azimuth,pitch,roll;      azimuth = event.values[0];     pitch = event.values[1];     roll = event.values[2];      ((textview)findviewbyid(r.id.azimuth)).settext("azimuth : " + azimuth);     ((textview)findviewbyid(r.id.pitch)).settext("pitch : " + pitch);     ((textview)findviewbyid(r.id.roll)).settext("roll : " + roll); }  public void onproxychanged(sensorevent event) {     float x;      x = event.values[0];      ((textview)findviewbyid(r.id.prox)).settext("proximité : " + x);  }  public class mylocationlistener implements locationlistener  {      @override     public void onlocationchanged(location location) {         double longitude, lattitude;          longitude = location.getlongitude();         lattitude = location.getlatitude();          ((textview)findviewbyid(r.id.longi)).settext("longitude : " + longitude);         ((textview)findviewbyid(r.id.latti)).settext("lattitude : " + lattitude);           lm.requestlocationupdates( locationmanager.network_provider, 0, 0, ls);       }      @override     public void onproviderdisabled(string provider) {          ((textview)findviewbyid(r.id.warngps)).settext("gps desactivé");      }      @override     public void onproviderenabled(string provider) {         ((textview)findviewbyid(r.id.warngps)).settext("gps activé");      }      @override     public void onstatuschanged(string provider, int status, bundle extras) {         // todo auto-generated method stub      }  } 

}

has idea problem ?

thank , have nice day/evening/night.

replace below line

lm.requestlocationupdates(locationmanager.gps_provider, 1000l, 1.0f, ls);