获取整个应用程序中的最新位置
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我需要在整个应用中更新位置。我正在尝试通过在我的所有活动中添加以下代码来做到这一点。我的问题是，我不能确定用户将在一项活动中停留足够长的时间来获取更新。如何在给定的时间（例如30分钟）使一些应用程序侦听器获得更新的位置？
private LocationManager mLocationManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// My activity stuff
}
private Location getBestLocation(LocationManager locationManager) {
Location location_gps = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
Location location_network = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
// If both are available, get the most recent
if(location_gps!=null && location_network !=null) {
return (location_gps.getTime() > location_network.getTime())?location_gps:location_network;
}
else if(location_gps==null && location_network ==null){
return null;
}
else
return (location_gps==null)?location_network:location_gps;
}
@Override
protected void onResume() {
super.onResume();
// Request location updates at startup
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, LOCATION_UPDATE_MIN_TIME, LOCATION_UPDATE_MIN_DIST, this);
mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, LOCATION_UPDATE_MIN_TIME, LOCATION_UPDATE_MIN_DIST, this);
getBestLocation(mLocationManager)
}
@Override
protected void onPause() {
super.onPause();
// Remove the locationlistener updates when Activity is paused
mLocationManager.removeUpdates(this);
}
@Override
public void onLocationChanged(Location location) {
GlobalVars.lat = (Double) (location.getLatitude());
GlobalVars.lng = (Double) (location.getLongitude());
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// Nothing here
}
@Override
public void onProviderEnabled(String provider) {
Location location = getBestLocation(mLocationManager);
// Initialize the location fields
if (location != null) {
GlobalVars.lat = (Double) (location.getLatitude());
GlobalVars.lng = (Double) (location.getLongitude());
}
}
@Override
public void onProviderDisabled(String provider) {
}
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2 个回复
河饶办斜施
public class LocationService extends Service implements LocationListener { LocationManager locationManager; @Override public IBinder onBind(Intent intent) { return null; } @Override public void onCreate() { locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); Location loc = getBestLocation(locationManager); GlobalVars.lat = (Double) (loc.getLatitude()); GlobalVars.lng = (Double) (loc.getLongitude()); } public void onLocationChanged(Location loc) { GlobalVars.lat = (Double) (loc.getLatitude()); GlobalVars.lng = (Double) (loc.getLongitude()); } public static Location getBestLocation(LocationManager locationManager) { Location location_gps = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); Location location_network = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); // If both are available, get the most recent if(location_gps!=null && location_network !=null) { return (location_gps.getTime() > location_network.getTime())?location_gps:location_network; } else if(location_gps==null && location_network ==null){ return null; } else return (location_gps==null)?location_network:location_gps; } public void onProviderEnabled(String s){} public void onProviderDisabled(String s){} public void onStatusChanged(String s, int i, Bundle b){} @Override public void onDestroy() { locationManager.removeUpdates(this); } }济畦刨