android - 在我的安卓手机中不使用互联网查找纬度和经度

Question

我想在我的 android 应用程序中获取纬度和经度。请为我的 android 应用程序提供一个代码，以便在不使用互联网的情况下获取纬度和经度。谢谢

Answer 1

你可以试试这个，它对我有用：

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) {
    }
 
    @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;
    }
 
}

以这种方式使用它：

gps = new GPSTracker(PromotionActivity.this);

// check if GPS enabled     
if(gps.canGetLocation()){
    double latitude = gps.getLatitude();
    double longitude = gps.getLongitude();
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
    gps.showSettingsAlert();    
}

Answer 2

好吧，您有 GPS 提供商和网络提供商。

没有互联网，您只能使用GPS 提供商

这是代码片段：

private final float MIN_DISTANCE = 6; // 6 meters

LocationManager locationManager = (LocationManager) 
                          m_context.getSystemService(Context.LOCATION_SERVICE);
locationManager.addGpsStatusListener(this);


LocationListener listener = this;   

    locationManager.requestLocationUpdates
           (LocationManager.GPS_PROVIDER, 0, MIN_DISTANCE, listener);

...

      public void onLocationChanged(Location location) {
    /* your code  */
}