Question

我有一个三星Galaxy Tab A.我已经实现android.location.LocationListener并且onLocationChanged(Location location)被调用，它给了我正确的经度和纬度，但是，

问题是： location.getTime()给了我错误的时间，它返回的时间接近300000密耳左右。它应该是1471243684497。

我不知道该怎么做。

GPSTracker课程：

import java.io.IOException;
import java.util.List;
import java.util.Locale;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;

public class GPSTracker extends Service implements LocationListener
{
    //flag for GPS Status
    boolean isGPSEnabled = false;

    //flag for network status
    //boolean isNetworkEnabled = false;

    boolean canGetLocation = false;

    Location location;
    double latitude;
    double longitude;

    //The minimum distance to change updates in metters
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; //10 metters

    //The minimum time beetwen updates in milliseconds
    private static final long MIN_TIME_BW_UPDATES = 1000 * 10; // 1 minute

    //Declaring a Location Manager
    protected LocationManager locationManager;

    /*public GPSTracker(Context context) 
    {
        this.mContext = context;
        getLocation();
    }*/

    public Location getLocation(Context ctx)
    {
        try
        {
            locationManager = (LocationManager) ctx.getSystemService(LOCATION_SERVICE);

            //getting GPS status
            isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

            //getting network status
            //isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

            if (!isGPSEnabled /*&& !isNetworkEnabled*/)
            {
                // no network provider is enabled
            }
            else
            {
                this.canGetLocation = true;

                //First get location from Network Provider
               /* if (isNetworkEnabled)
                {
                    locationManager.requestLocationUpdates(
                            LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES,
                            MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                    Log.d("Network", "Network");

                    if (locationManager != null)
                    {
                        location = 
                                locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                        updateGPSCoordinates();
                    }
                }*/

                //if GPS Enabled get lat/long using GPS Services
                if (isGPSEnabled)
                {
                    if (location == null)
                    {
                        locationManager.requestLocationUpdates(
                                LocationManager.GPS_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);

                        Log.d("GPS Enabled", "GPS Enabled");

                        if (locationManager != null)
                        {
                            location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                            updateGPSCoordinates();
                        }
                    }
                }
            }
        }
        catch (Exception e)
        {
            //e.printStackTrace();
            Log.e("Error : Location", "Impossible to connect to LocationManager", e);
        }

        return location;
    }

    public void updateGPSCoordinates()
    {
        if (location != null)
        {
            latitude = location.getLatitude();
            longitude = location.getLongitude();
        }
    }

    /**
     * Stop using GPS listener
     * Calling this function will stop using GPS in your app
     */

    public void stopUsingGPS()
    {
        if (locationManager != null)
        {
            locationManager.removeUpdates(GPSTracker.this);
        }
    }

    /**
     * Function to get latitude
     */
    public double getLatitude()
    {
        if (location != null)
        {
            latitude = location.getLatitude();
        }

        return latitude;
    }

    /**
     * Function to get longitude
     */
    public double getLongitude()
    {
        if (location != null)
        {
            longitude = location.getLongitude();
        }

        return longitude;
    }

    /**
     * Function to check GPS/wifi enabled
     */
    public boolean canGetLocation()
    {
        if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)/*&&
                !locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)*/){
            this.canGetLocation = false;
        } else {
            this.canGetLocation = true;
        }
        return this.canGetLocation;
    }

    /**
     * Get list of address by latitude and longitude
     * @return null or List<Address>
     */
    public List<Address> getGeocoderAddress(Context context)
    {
        if (location != null)
        {
            Geocoder geocoder = new Geocoder(context, Locale.ENGLISH);
            try 
            {
                List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
                return addresses;
            } 
            catch (IOException e) 
            {
                //e.printStackTrace();
                Log.e("Error : Geocoder", "Impossible to connect to Geocoder", e);
            }
        }

        return null;
    }

    /**
     * Try to get AddressLine
     * @return null or addressLine
     */
    public String getAddressLine(Context context)
    {
        List<Address> addresses = getGeocoderAddress(context);
        if (addresses != null && addresses.size() > 0)
        {
            Address address = addresses.get(0);
            String addressLine = address.getAddressLine(0);

            return addressLine;
        }
        else
        {
            return null;
        }
    }

    /**
     * Try to get Locality
     * @return null or locality
     */
    public String getLocality(Context context)
    {
        List<Address> addresses = getGeocoderAddress(context);
        if (addresses != null && addresses.size() > 0)
        {
            Address address = addresses.get(0);
            String locality = address.getLocality();

            return locality;
        }
        else
        {
            return null;
        }
    }

    /**
     * Try to get Postal Code
     * @return null or postalCode
     */
    public String getPostalCode(Context context)
    {
        List<Address> addresses = getGeocoderAddress(context);
        if (addresses != null && addresses.size() > 0)
        {
            Address address = addresses.get(0);
            String postalCode = address.getPostalCode();

            return postalCode;
        }
        else
        {
            return null;
        }
    }

    /**
     * Try to get CountryName
     * @return null or postalCode
     */
    public String getCountryName(Context context)
    {
        List<Address> addresses = getGeocoderAddress(context);
        if (addresses != null && addresses.size() > 0)
        {
            Address address = addresses.get(0);
            String countryName = address.getCountryName();

            return countryName;
        }
        else
        {
            return null;
        }
    }

    @Override
    public void onLocationChanged(Location location) 
    {   
    }

    @Override
    public void onProviderDisabled(String provider) 
    {   
    }

    @Override
    public void onProviderEnabled(String provider) 
    {   
    }


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

    }

    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }
}

我自己的类扩展了GPSTracker类：

public class NewMainService extends GPSTracker {


    @Override
    public void onLocationChanged(Location location) {
        long time = location.getTime();
        Log.i("TAG", "onLocationChanged time: "+time); //prints wrong timestamp
        super.onLocationChanged(location);
    }
}

修改：

其他设备上的一切正常。

我用谷歌搜索了它，这是某些设备中的一个错误。位置监听器在一段时间后停止接收更改。

它给我的时间就像设备的正常运行时间，它是几个小时，它不是约会对象。

Answer 1

您可以使用NMEA位置监听器，只能从中获取时间。即使您更改了设备的时区或日期和时间，它也始终为真，并且处于UTC时间，这将始终为您提供当前的实际日期和时间。

Limitaions：

- 如果GPS或位置关闭，您将无法获得NMEA。       （您可以检查位置是否已打开）

-if位置已开启但用户仅通过“设置”将其准确度更改为网络，您将无法获得NMEA。       （您可以查看是否locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)）

Android onLocationChanged location.getTime（）返回错误的时间

1 个答案: