Question

我正在尝试获取android的经度和纬度，这是我的代码：

    LocationManager locationManager = (LocationManager)
            this_activity.getSystemService(Context.LOCATION_SERVICE);

    LocationListener locationListener = new MyLocationListener();
    locationManager.requestLocationUpdates(
            LocationManager.GPS_PROVIDER, 5000, 10, locationListener);




 public class MyLocationListener implements LocationListener {

    @Override
    public void onLocationChanged(Location loc) {
        longitude = Double.toString(loc.getLongitude());
        latitude = Double.toString(loc.getLatitude());
    }

    @Override
    public void onProviderDisabled(String provider) {}

    @Override
    public void onProviderEnabled(String provider) {}

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

Manifest Permissions：

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

我经常得到经度和纬度的0.0s

Answer 1

除了@AshishPedhadiya提到你只听GPS提供商的权限。

LocationListener locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(
        LocationManager.GPS_PROVIDER, 5000, 10, locationListener);

GPS不能在里面工作。因此，当您测试应用程序时，它几乎总是会返回（0,0）位置。您可能也想收听NETWORK_PROVIDER，如果没有GPS位置，它会估计来自手机信号塔和WiFi点的位置。

locationManager.requestLocationUpdates(
        LocationManager.NETWORK_PROVIDER, 5000, 10, locationListener);

此外，要获得快速地理位置，请查看Application.getLastKnownLocation()方法。

Answer 2

我用过GPSTracker：

/**
 * Created by hassen on 9/20/14.
 */
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;
                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) {
// TODO Auto-generated method stub
    }
    @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;
    }
}

在主要活动中：

    GPSTracker gps = new GPSTracker(this_activity);
    if(gps.canGetLocation()){
        latitude = Double.toString(gps.getLatitude());
        longitude = Double.toString(gps.getLongitude());
        // \n is for new line
    }else{
        // can't get location
        // GPS or Network is not enabled
        // Ask user to enable GPS/network in settings
        gps.showSettingsAlert();
    }

Answer 3

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
add this permission to your manifest file

Answer 4

<!-- Needed only if your app targets Android 5.0 (API level 21) or higher. -->
<uses-feature android:name="android.hardware.location.gps" />

您需要在Android开发人员门户网站

中提到的5.0以上版本的清单文件中添加权限请求

Source

Android获取经度和纬度始终返回0.0

4 个答案: