我无法获得GPS位置

时间:2014-04-18 22:36:58

标签: java android gps geolocation location

1.以下代码为我提供网络位置但不提供GPS位置
 2.当我禁用我的WIFI时,它会给出网络位置  3.当我禁用我的网络时,它仅显示上一个已知位置  4.首先,我需要检查网络是否可用  5.如果网络可用从网络获取位置
 6.否则我需要获得GPS的位置

public class GetandGiveLocation extends Service implements LocationListener {

    private final Context mContext;

    boolean isGPSEnabled = false;

    boolean isNetworkEnabled = false;

    boolean canGetLocation = false;

    Location location;
    double latitude;
    double longitude;
    String bestProvider;

    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 0;

    private static final long MIN_TIME_BW_UPDATES = 0;

    protected LocationManager locationManager;

    public GetandGiveLocation(Context context) {
        this.mContext = context;
        getLocation();
    }

    public Location getLocation() {
        try {

            locationManager = (LocationManager) mContext
                    .getSystemService(LOCATION_SERVICE);

            isGPSEnabled = locationManager
                    .isProviderEnabled(LocationManager.GPS_PROVIDER);

            isNetworkEnabled = locationManager
                    .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

            if (!isGPSEnabled && !isNetworkEnabled) {
                showSettingsAlert();
            } else {
                this.canGetLocation = true;

                if (isNetworkEnabled) {

                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                    if (locationManager != null) {
                        location = locationManager
                                .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }
                    }
                }
                if (isGPSEnabled) {

                    locationManager.requestLocationUpdates(
                            LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                    if (locationManager != null) {
                        location = locationManager
                                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                        if (location != null) {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        }

                    }

                }

            }

        } catch (Exception e) {
            e.printStackTrace();
        }

        return location;
    }

    public boolean canGetLocation() {
        return this.canGetLocation;
    }

    @Override
    public void onLocationChanged(Location location) {

        latitude = location.getLatitude();
        longitude = location.getLongitude();
        GoogleMapViewer gmv = new GoogleMapViewer();
        SendToWebsite stw = new SendToWebsite();
        stw.execute(latitude, longitude);

    }

}

1 个答案:

答案 0 :(得分:0)

我的猜测是你可能想要改变

if (isNetworkEnabled) {
    ...
}
if (isGPSEnabled) {
    ...
}

if (isNetworkEnabled) {
    ...
}
else if (isGPSEnabled) {
    ...
}

否则它(我假设)如果两者都可用,则在转向GPS之前不会尝试WiFi。

选择GPS时,预热可能需要一些时间。在此期间,getLastKnownLocation可能是陈旧的,甚至是null。

我已经使用GPS实现了一些代码,用于确定GPS是否以及何时准备好提供有效数据(已经获得第一次修复)。您可以在此处找到代码:Location servise GPS Force closed

代码只关心GPS,但也必须修改以处理网络定位。我记得,我在上面的链接中提到的原始代码也有网络定位,所以不应该再次添加。

希望这有帮助 - 快乐编码