如何在默认导航一个 Geopoint 中设置用户当前位置？

Posted 2023-02-23

【中文标题】如何在默认导航一个 Geopoint 中设置用户当前位置？

【英文标题】：How to set user current location in default navigation one Geopoint?

【发布时间】：2012-08-23 14:40:59

【问题描述】：

我想在我的一个地理点中设置我的当前位置是默认位置。如果我想获取从我当前位置到另一个位置的方向路径，我想在我的一个位置显示默认当前位置。

这是查找用户当前位置的代码：

public class WhereIActivity extends MapActivity

    @Override
    public void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_where_i);

 MapView myMapView=(MapView)findViewById(R.id.myMapView);

        mapController=myMapView.getController();


       myMapView.displayZoomControls(false);

       mapController.setZoom(17);


       myMapView.setStreetView(true);
       myMapView.setTraffic(true);

LocationManager locationManager; 
        String context = Context.LOCATION_SERVICE; 
        locationManager = (LocationManager)getSystemService(context); 

        Criteria crta = new Criteria(); 
        crta.setAccuracy(Criteria.ACCURACY_FINE); 
        crta.setAltitudeRequired(false); 
        crta.setBearingRequired(false); 
        crta.setCostAllowed(true); 
        crta.setPowerRequirement(Criteria.POWER_LOW); 
        String provider = locationManager.getBestProvider(crta, true); 

     // String provider = LocationManager.GPS_PROVIDER; 
        Location location = locationManager.getLastKnownLocation(provider); 
        updateWithNewLocation(location); 

        locationManager.requestLocationUpdates(provider, 2000, 10, locationListener); 
         

 private final LocationListener locationListener = new LocationListener() 
     

    @Override 
    public void onLocationChanged(Location location)  
    updateWithNewLocation(location); 
     

    @Override 
    public void onProviderDisabled(String provider)  
    updateWithNewLocation(null); 
     

    @Override 
    public void onProviderEnabled(String provider)  
     

    @Override 
    public void onStatusChanged(String provider, int status, Bundle extras)  
     

    ; 

private void updateWithNewLocation(Location location)  
        String latLong;
        TextView myLocation; 
        myLocation = (TextView) findViewById(R.id.myLocation); 

        String addressString = "no address found"; 

        if(location!=null)  



            positionOverlay.setLocation(location);


            Double geoLat=location.getLatitude()*1E6;
            Double geoLng=location.getLongitude()*1E6;
            GeoPoint point=new GeoPoint(geoLat.intValue(),geoLng.intValue());

            mapController.animateTo(point);

        double lat = location.getLatitude(); 
        double lon = location.getLongitude(); 
        latLong = "Lat:" + lat + "\nLong:" + lon; 

double lattitude = location.getLatitude(); 
        double longitude = location.getLongitude(); 

        Geocoder gc = new Geocoder(this,Locale.getDefault()); 
        try  
        List<Address> addresses= gc.getFromLocation(lattitude, longitude, 1); 
        StringBuilder sb = new StringBuilder(); 
        if(addresses.size()>0)  
        Address address=addresses.get(0);
        for(int i=0;i<address.getMaxAddressLineIndex();i++)
            sb.append(address.getAddressLine(i)).append("\n");
        sb.append(address.getLocality()).append("\n"); 
        sb.append(address.getPostalCode()).append("\n"); 
    sb.append(address.getCountryName()); 
     
        addressString = sb.toString(); 
         
        catch (Exception e)  
         
         else  
        latLong = " NO Location Found "; 
         

        myLocation.setText("Your Current Position is :\n"+ latLong + "\n"+  addressString ); 
    

@Override
    protected boolean isRouteDisplayed() 
        // TODO Auto-generated method stub
        return false;
    
    

如何在方向路径中设置此用户当前位置默认值：

Intent intent = new Intent(android.content.Intent.ACTION_VIEW,
                Uri.parse("http://maps.google.com/maps/?daddr=my+street+address"));
                intent.setClassName("com.google.android.apps.maps", "com.google.android.maps.MapsActivity");
                startActivity(intent);

【参考方案1】：

请仔细阅读此链接。此代码在我的应用程序中成功运行

http://ckpatel.blog.com/category/android-gps/

此代码用于绘制路径，我认为获取位置代码是正确的，但请在移动设备中检查。谢谢