在未显示地图的Android中获得纬度和经度

Question

是否有一种无需显示地图即可获取信息的方法？我想在工作中与其他活动取得位置上的协调。tnx很多。

Answer 1

使用以下代码。它对我有用。

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;

public class GPSTracker extends Service implements LocationListener{

    private Context context;
    boolean isGPSEnabled = false;
    boolean isNetworkEnabled = false;
    boolean canGetLocation = false;

    Location location;
    double latitude,longitude;

    LocationManager locationManager;
    AlertDialogManager am = new AlertDialogManager();
    public GPSTracker(Context context){
        this.context = context;
        getLocation();
    }
    private Location getLocation() {
        // TODO Auto-generated method stub
        try{
            locationManager = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);

            isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

            isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);


            if (!isGPSEnabled && !isNetworkEnabled){

            } else {
                this.canGetLocation = true;

                if (isNetworkEnabled){

                    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 60000, 3, this);

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

                if (isGPSEnabled){
                    if (location == null){
                        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 60000, 3, this);
                        if (locationManager != null){
                            location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                            if (location != null){
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }
                } else {
                    showAlertDialog();
                }
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        return location;
    }
    public void showSettingsAlert(){
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(GPSTracker.this);

        // 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?");

        // Setting Icon to Dialog
        //alertDialog.setIcon(R.drawable.delete);

        // 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);
                startActivity(intent);
                dialog.cancel();
            }
        });

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

        // Showing Alert Message
        alertDialog.show();
    }

    public void showAlertDialog(){
        am.showAlertDialog(GPSTracker.this, "GPS Setting", "Gps is not enabled. Do you want to enabled it ?", false);
    }
    public double getLatitude(){
        if (location != null){
            latitude = location.getLatitude();
        }

        return latitude;
    }

    public double getLongitude(){
        if (location != null){
            longitude = location.getLongitude();
        }

        return longitude;
    }

    public boolean canGetLocation(){
        return this.canGetLocation;
    }
    @Override
    public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub
        if (location != null){
            this.location = location;
        }
    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }

}

并且在如下的MainActivity调用函数中。

GPSTracker gps = new GPSTracker (this);
double latitude = gps.getLatitude();
double longitude= gps.getLongitude();

Answer 2

通过使用LocationManager，您可以获取lat和lang：

LocationManager

对

LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
double longitude = location.getLongitude();
double latitude = location.getLatitude();

的调用不会被阻止-这意味着如果当前没有位置可用，它将返回getLastKnownLocation()-因此，您可能想看看将null传递给LocationListener，因此将为您提供位置的异步更新。

LocationListener

如果您想使用GPS，则需要给您的应用程序requestLocationUpdates() method。

requestLocationUpdates()

您可能还想在GPS不可用时添加

private final LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {
        longitude = location.getLongitude();
        latitude = location.getLatitude();
    }
}

lm.requestLocationUpdates(LocationManager.GPS, 2000, 10, locationListener);

，并用ACCESS_FINE_LOCATION permission选择您的位置提供者。

Answer 3

使用此代码能够获取纬度和经度值，并使确保在使用应用程序之前，您已获得清单的访问权限

ACCESS_FINE_LOCATION

Answer 4

如果您想在没有互联网的情况下使用此方法，请使用此选项>>

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