相关疑难解决方法(0)

我想在Android应用程序中找到我当前位置的纬度和经度.当我用手机稳定时,我只需要它.

我的代码是:

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);
    }

在模拟器上运行后,我总是找到"找不到位置".为什么会这样？

我需要获取设备当前的地理位置.

场景:如果我在US...:

my device location should be US

与案件相同,当我在 UK:

my device location should be UK

我需要示例代码来查找此地理位置.(location determined by Network Location Provider)

我写了以下代码,返回我当前的位置地址.但是只有手动打开我的Wifi才能获得这些值.但我想打开Gps并从GPS获取我的地址,而不是从Wifi.有人请告诉我这段代码中要修改的是什么.以下是用于查找当前地址的代码.提前致谢.

public String myloc()
{ 
    criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_FINE);
    criteria.setAltitudeRequired(false);
    criteria.setBearingRequired(false);
    criteria.setCostAllowed(true);
    criteria.setPowerRequirement(Criteria.POWER_LOW);

    locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    String provider = locationManager.getBestProvider(criteria, true);

    // Update the GUI with the last known 
    Location location = locationManager.getLastKnownLocation(provider);

    if(location!=null)
    {
        double lat = location.getLatitude();
        double lng = location.getLongitude();
        latLongString = "Lat:" + lat + "\nLong:" + lng;

        Geocoder gc = new Geocoder(this, Locale.getDefault());
        try
        {
            List<Address> addresses = gc.getFromLocation(lat, lng, 1);
            StringBuilder sb = new StringBuilder();
            if (addresses.size() > 0) 
            {
              Address address = …