Question

我正在尝试获取android位置，我有这段代码但位置永远不会返回。我搜索了堆栈溢出。

我发现了这个错误：https://code.google.com/p/android/issues/detail?id=57707 但到目前为止还没有修复，或者我找不到。这是代码。任何帮助将不胜感激

    Criteria criteria = new Criteria();
    criteria.setCostAllowed(true);
    criteria.setAccuracy(Criteria.ACCURACY_COARSE);
    final LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    String provider = lm.getBestProvider(criteria, true);
    Location l = lm.getLastKnownLocation(provider);
    final String date = fmtForPresenter.print(dt);
    if(l==null) {
        lm.requestLocationUpdates(provider, 100, 200,
                new android.location.LocationListener() {
                    @Override
                    public void onStatusChanged(String provider, int status,
                                                Bundle extras) {
                    }

                    @Override
                    public void onProviderEnabled(String provider) {
                        Log.e("PROVIDER", "PRO: " + provider);
                    }

                    @Override
                    public void onProviderDisabled(String provider) {
                        Log.e("PROVIDER", "PRO: " + provider);
                    }

                    @Override
                    public void onLocationChanged(final Location location) {

                        lat = location.getLatitude();
                        lng = location.getLongitude();
                        presenter.getFoot(userProfile.getToken(),"public",lat,lng,date);
                        if ((ContextCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_FINE_LOCATION) ==
                                PackageManager.PERMISSION_GRANTED &&
                                ContextCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.ACCESS_COARSE_LOCATION) ==
                                        PackageManager.PERMISSION_GRANTED)) {
                            lm.removeUpdates(this);
                        }
                    }
                });
    }
    else {
        lat = l.getLatitude();
        lng = l.getLongitude();
        presenter.getFoot(userProfile.getToken(),"public",lat,lng,date);
    }

编辑：

如果我重新启动手机位置再次工作，但我不认为这是一个解决方案，因为我不能告诉我的所有客户每次都有问题重启他们的手机

Answer 1

使用此类:(使用它：

FindGPSLocation gps;
                    gps = new FindGPSLocation(ClientsActivity.this);
                    if(gps.canGetLocation()){

                        latitude = String.valueOf(gps.getLatitude());
                        longitude = String.valueOf(gps.getLongitude());

                    }
                    else
                    {

                        gps.showSettingsAlert();
                    }

）

public class FindGPSLocation 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 FindGPSLocation(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(FindGPSLocation.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;
}

}

Answer 2

尝试使用强制代码获取位置...并确保在设备中启用了位置服务

locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 400, 1000, this);  @Override
public void onLocationChanged(Location location) {
    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
    CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng, 8);
    mMap.animateCamera(cameraUpdate);
    locationManager.removeUpdates(this);
}

@Override
public void onStatusChanged(String s, int i, Bundle bundle) {

}

@Override
public void onProviderEnabled(String s) {

}

@Override
public void onProviderDisabled(String s) {

}

Android位置更新未返回

2 个答案: