我们可以在没有互联网而只有 GPS 的情况下获得纬度和经度吗？

Posted 2023-02-23

【中文标题】我们可以在没有互联网而只有 GPS 的情况下获得纬度和经度吗？

【英文标题】：Can we get latitude and longitude without internet and only GPS?

【发布时间】：2016-11-17 07:19:49

【问题描述】：

我有一个小问题

我们可以离线从安卓应用中捕获纬度和经度吗？例如，在没有互联网连接的情况下，只使用 GPS？

谢谢

【参考方案1】：

是的。使用 GPS_PROVIDER，并使用 LocationManager，而不是 Play Services 位置 api

【参考方案2】：

是的，您始终可以通过 GPS 获取位置，因为要使用 GPS，您不需要互联网连接。

【参考方案3】：

您可以使用此示例。只需启动并使用 getLatitude() 和 getLongitude() 获取位置

import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;
import android.widget.Toast;

import com.pakban.mobile.warmish.Activityes.MapsActivity;

public class GPSTracker extends Service implements LocationListener 

    private final Context mContext;

    // flag for GPS status
    boolean isGPSEnabled = false;

    // flag for network status
    boolean isNetworkEnabled = false;

    // flag for GPS status
    boolean canGetLocation = false;

    Location location; // location
    double latitude; // latitude
    double longitude; // longitude

    // The minimum distance to change Updates in meters
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

    // The minimum time between updates in milliseconds
    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

    // Declaring a Location Manager
    protected LocationManager locationManager;

    public GPSTracker(Context context) 
        this.mContext = context;
        getLocation();
    

    public Location getLocation() 
        try 
            locationManager = (LocationManager) mContext
                    .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);
                        if (location != null) 
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
                        
                    
                
                // 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);
                            if (location != null) 
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            
                        
                    
                
            

         catch (Exception e) 
            e.printStackTrace();
        

        return location;
    

    /**
     * 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
        return latitude;
    

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

        // return longitude
        return longitude;
    

    /**
     * Function to check GPS/wifi enabled
     * @return boolean
     * */
    public boolean canGetLocation() 
        return this.canGetLocation;
    

    /**
     * Function to show settings alert dialog
     * On pressing Settings button will lauch Settings Options
     * */
    public void showSettingsAlert()
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);

        // Setting Dialog Title
        alertDialog.setTitle("GPS is settings");

        // Setting Dialog Message
        alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");

        // On pressing Settings button
        alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() 
            public void onClick(DialogInterface dialog,int which) 
                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                mContext.startActivity(intent);
            
        );

        // on pressing cancel button
        alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() 
            public void onClick(DialogInterface dialog, int which) 
                dialog.cancel();
            
        );

        // Showing Alert Message
        alertDialog.show();
    

    @Override
    public void onLocationChanged(Location location) 
       // this method will execute if you location changed. use it //for update 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;
    

你应该这样写：

GPSTracker gPSTracker =new GPSTracker(context);

然后你可以得到这样的位置：

if (gPSTracker.canGetLocation()) 
          Log.d("your lat",""+ gPSTracker.getLatitude());
          Log.d("your lang",""+ gPSTracker.getLongitude());

您必须在清单中添加此权限：

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />