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現在の位置を継続的に取得し、Android で mapview にオーバーレイアイテムを移動する必要がありますか? 現在の場所を取得するために別のクラスを使用し、そのメソッドを実装する必要がある現在の場所を取得するために次のコードを使用しましたが、アクティビティの上で現在の場所を継続的に取得することはできません。

**CurentLocation.java**
import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;

public class CurrentLocation {
    Timer timer1;
    LocationManager lm;
    LocationResult locationResult;
    boolean gps_enabled=false;
    boolean network_enabled=false;

    public boolean getLocation(Context context, LocationResult result)
    {
        //I use LocationResult callback class to pass location value from MyLocation to user code.
        locationResult=result;
        if(lm==null)
            lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

        //exceptions will be thrown if provider is not permitted.
        try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
        try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}

        //don't start listeners if no provider is enabled
        if(!gps_enabled && !network_enabled)
            return false;

        if(gps_enabled)
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
        if(network_enabled)
            lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
        timer1=new Timer();
        timer1.schedule(new GetLastLocation(), 20000);
        return true;
    }

    LocationListener locationListenerGps = new LocationListener() {
        public void onLocationChanged(Location location) {
            timer1.cancel();
            locationResult.gotLocation(location);
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerNetwork);
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    LocationListener locationListenerNetwork = new LocationListener() {
        public void onLocationChanged(Location location) {
            timer1.cancel();
            locationResult.gotLocation(location);
            lm.removeUpdates(this);
            lm.removeUpdates(locationListenerGps);
        }
        public void onProviderDisabled(String provider) {}
        public void onProviderEnabled(String provider) {}
        public void onStatusChanged(String provider, int status, Bundle extras) {}
    };

    class GetLastLocation extends TimerTask {
        @Override
        public void run() {
             lm.removeUpdates(locationListenerGps);
             lm.removeUpdates(locationListenerNetwork);

             Location net_loc=null, gps_loc=null;
             if(gps_enabled)
                 gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
             if(network_enabled)
                 net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

             //if there are both values use the latest one
             if(gps_loc!=null && net_loc!=null){
                 if(gps_loc.getTime()>net_loc.getTime())
                     locationResult.gotLocation(gps_loc);
                 else
                     locationResult.gotLocation(net_loc);
                 return;
             }

             if(gps_loc!=null){
                 locationResult.gotLocation(gps_loc);
                 return;
             }
             if(net_loc!=null){
                 locationResult.gotLocation(net_loc);
                 return;
             }
             locationResult.gotLocation(null);
        }
    }

    public static abstract class LocationResult{
        public abstract void gotLocation(Location location);
    }
}

主なアクティビティ.java

public class ManinActivity extends MapActivity {

    double currentLatitude=666.563961600000000000;
    double currentLongitude=66666.334281799999980000;
    MapView mapView; 
    MapController mc;
    GeoPoint p;

        public void onCreate(Bundle savedInstanceState)
        {

            //===========Call Current location==
            CurrentLocation myLocation = new CurrentLocation();
            myLocation.getLocation(this, locationResult);
                }

    LocationResult locationResult = new LocationResult(){
                @Override
                public void gotLocation(Location location){
                    if(location!=null)
                    {
                    currentLatitude=location.getLatitude();
                    currentLongitude=location.getLongitude() ;

                    }
                }
            };

}

助けてください

4

1 に答える 1

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これらの行を削除します LocationListener

  lm.removeUpdates(this);
  lm.removeUpdates(locationListenerGps);

アップデート

また、タイマーを停止したくない場合は、この行も削除します LocationListener

 timer1.cancel();

もっとアップデート

GetLastLocation クラスでこれらの行を削除する必要もあります

 lm.removeUpdates(locationListenerGps);
 lm.removeUpdates(locationListenerNetwork);
于 2012-12-04T08:28:08.717 に答える