找到当前位置的纬度和经度 [英] find current location latitude and longitude

问题描述

我有一个问题。我想找到我的纬度当前位置的经度和Android应用程序中。我只需要它的时候我很稳定，我的电话。

我的code是：

  LocationManager locationManager;
    locationManager =（LocationManager）getSystemService
    （Context.LOCATION_SERVICE）;
    位置位置= locationManager.getLastKnownLocation
    （LocationManager.GPS_PROVIDER）;


    locationManager.requestLocationUpdates（
             LocationManager.GPS_PROVIDER，0,0，（LocationListener的）这一点）;
    updateWithNewLocation（位置）;
    }

    私人无效updateWithNewLocation（位置定位）{
    TextView的myLocationText =（TextView中）findViewById（R.id.myLocationText）;

    字符串latLongString;

    如果（位置！= NULL）{
    双纬度= location.getLatitude（）;
    双LNG = location.getLongitude（）;
    latLongString =纬度：+纬度+\ nLong：+ LNG;
    } 其他 {
    latLongString =找不到位置;
    }

    myLocationText.setText（您现在的位置是：\ N+
    latLongString）;
    }
 

在模拟器中运行它之后，我总能找到找不到位置。为什么会这样？

解决方案

 公共类GPSMAP延伸活动{

    GeoPoint对象的GeoPoint;

    @覆盖
    公共无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        LocationManager locManager;
        的setContentView（R.layout.main）;
        locManager =（LocationManager）getSystemService（Context.LOCATION_SERVICE）;
        locManager.requestLocationUpdates（LocationManager.GPS_PROVIDER，1000L，
            500.0f，LocationListener的）;
        位置位置= locManager
                .getLastKnownLocation（LocationManager.GPS_PROVIDER）;
        如果（位置！= NULL）{
            双纬度= location.getLatitude（）;
            双经度= location.getLongitude（）;
        }
    }

    私人无效updateWithNewLocation（位置定位）{
        TextView的myLocationText =（TextView中）findViewById（R.id.text）;
        字符串latLongString =;
        如果（位置！= NULL）{
            双纬度= location.getLatitude（）;
            双LNG = location.getLongitude（）;
            latLongString =纬度：+纬度+\ nLong：+ LNG;
        } 其他 {
            latLongString =找不到位置;
        }
        myLocationText.setText（您现在的位置是：\ N+ latLongString）;
    }

    私人最终LocationListener的LocationListener的=新LocationListener的（）{

        公共无效onLocationChanged（位置定位）{
            updateWithNewLocation（位置）;
        }

        公共无效onProviderDisabled（字符串提供商）{
            updateWithNewLocation（空）;
        }

        公共无效onProviderEnabled（字符串提供商）{}

        公共无效onStatusChanged（字符串商，INT地位，捆绑演员）{}
    };
}
 

如果你会使用这个code，你会得到答案。

I have a problem. I want to find latitude and longitude of my current location in an android application. I just need it when I am stable with my phone.

My code is:

LocationManager locationManager;
    locationManager = (LocationManager)getSystemService
    (Context.LOCATION_SERVICE);
    Location location = locationManager.getLastKnownLocation
    (LocationManager.GPS_PROVIDER);


    locationManager.requestLocationUpdates(                
             LocationManager.GPS_PROVIDER,0,0,(LocationListener) this);
    updateWithNewLocation(location);
    }

    private void updateWithNewLocation(Location location) {
    TextView myLocationText = (TextView)findViewById(R.id.myLocationText);

    String latLongString;

    if (location != null) {
    double lat = location.getLatitude();
    double lng = location.getLongitude();
    latLongString = "Lat:" + lat + "\nLong:" + lng;
    } else {
    latLongString = "No location found";
    }

    myLocationText.setText("Your Current Position is:\n" +
    latLongString);
    }

After running it on emulator i always find "no location found". Why this is so?

解决方案

public class GPSmap extends Activity {

    GeoPoint geoPoint;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LocationManager locManager;
        setContentView(R.layout.main);
        locManager =(LocationManager)getSystemService(Context.LOCATION_SERVICE);
        locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000L,
            500.0f, locationListener);
        Location location = locManager
                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
        if (location != null) {
            double latitude = location.getLatitude();
            double longitude = location.getLongitude();
        }
    }

    private void updateWithNewLocation(Location location) {
        TextView myLocationText = (TextView) findViewById(R.id.text);
        String latLongString = "";
        if (location != null) {
            double lat = location.getLatitude();
            double lng = location.getLongitude();
            latLongString = "Lat:" + lat + "\nLong:" + lng;
        } else {
            latLongString = "No location found";
        }
        myLocationText.setText("Your Current Position is:\n" + latLongString);
    }

    private final LocationListener locationListener = new LocationListener() {

        public void onLocationChanged(Location location) {
            updateWithNewLocation(location);
        }

        public void onProviderDisabled(String provider) {
            updateWithNewLocation(null);
        }

        public void onProviderEnabled(String provider) {}

        public void onStatusChanged(String provider,int status,Bundle extras){}
    };
}

If you will use this code, you will get answer.

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