location

问题 I am having this issue where my Android's location is always null, but it seems like it only happens when my app goes from the background to the foreground. Here is my code: Public.java: @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { String userId = AccessToken.getCurrentAccessToken().getUserId(); //Open DB and get freinds from db & posts. datasource = new FriendsDataSource(getContext()); datasource.open(); postsDataSource = new

问题 Have anyone gotten CLLocationManager to prompt for permission on tvos? I'm using the following code (that works on other platforms) to get a user's location and prompt for permissions. self.locationManager = [[CLLocationManager alloc] init]; self.locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers; self.locationManager.delegate = self; [self.locationManager requestWhenInUseAuthorization]; [self.locationManager requestLocation]; However, the authorization delegate is called

问题 I have a list of locations , following this pattern: [1] = {lat = -40.2452, longitude = -76.2489}, [2] = {lat = -40.2452, longitude = -76.2489}, [3] = {lat = -40.2452, longitude = -76.2489}, [4] = {lat = -40.2452, longitude = -76.2489} and a localition location = {lat = -40.2452, longitude = -76.2489} and I want to calculate Which of the locations this Within the distance. I found a formula that calculates the distance between two points. but if this list is big! is there any faster way? or

问题 Look, I'm using Google Maps JavaScript API v3. The user fills in an address and I show the streetview of that address. Everything's fine (a lot of locations work perfectly), till a enter a location like "Laken". It just displays grey, nothing else. I want to prevent the user from continuing to the next page with a grey image instead of a google maps streetview. When I fill in Laken, the getPanoramaByLocation() function returns status == "OK", because it has found something, but its not a

问题 <?xml version="1.0" encoding="utf-8"?> <manifest <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" /> <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/> <uses

问题 Hey guys, I have a question. If given a four dimensional array in FORTRAN, and told to find a location of a certain part of it (with a starting location of 200 and 4 bytes per integer). Is there a formula to find the location if is stored in row-major and column-major order. Basiically given array A(x:X, y:Y, z:Z, q:q) and told to find the location at A(a,b,c,d) what is the formula for finding the location 回答1: This comes up all the time when using C libraries with Fortran -- eg, calling MPI

问题 I am working on a project where I need to extract the locations in a given text file. I tried the Named Entity Recognition example given here. The code snippet of this is given below. But here it outputs all the three entities; names, locations, and organizations . Is there any solution to extract only the locations using python? import nltk def extract_entity_names(t): entity_names = [] if hasattr(t, 'label') and t.label: if t.label() == 'NE': entity_names.append(' '.join([child[0] for child

问题 Is there is a way to determine an iPhone's exact location (indoors, and to a distance of just a couple of feet) via use of radio/antenna's or some other infrastructure located around premises (i.e a hospital, shopping mall, school). Will appreciate any ideas/direction (technologies, research) as for how to overcome this limitation. 回答1: If you mean for an area you have control over (setting up a location network for a specific school/hospital) as opposed to generic location, you'd be able to

问题 I have an issue with a search function, it works correctly but is taking between 14-18 second to load and that is causing me great pain. This is the search function I am using: $sql="select *, ( 3959 * acos( cos( radians( $lat ) ) * cos( radians( `lat` ) ) * cos( radians( `lng` ) - radians( $lng ) ) + sin( radians( $lat ) ) * sin( radians( `lat` ) ) ) ) AS distance FROM postcodes, details WHERE `postcode`=postcodes.outcode HAVING " . implode(" AND ", $searches)." AND isactive='y' ORDER BY

问题 I am trying to abstain coordinates from the device, but the app crash. Anyone know what might have happened? I suppose the error happened when it asked for permission but the request was denied, maybe creating an if statement it works, but I couldn't find any information about that. output: fatal error: unexpectedly found nil while unwrapping an Optional value import UIKit import Foundation import CoreLocation class ViewController: UIViewController, CLLocationManagerDelegate { let