使用XMPP用户位置 [英] using XMPP for user location

问题描述

我想创建为Android，让我得到一个用户的地理位置的应用程序。这必须作出一个客户端 - 服务器应用和我使用的Openfire服务器端。
用于获取用户的位置，我将不得不使用XEP-0080，对不对？而SmackAPI也？
我完全新的XMPP和啪，因此，如果任何人都可以让我这个几个指针或者例子或任何类型的文档，我会非常感激。

I want to create an application for Android that enables me to get the geolocation of a user. This has to be made as a client-server app and for the server side I'm using OpenFire. For getting the user's location I would have to use XEP-0080, right? And SmackAPI also? I'm completely new to XMPP and Smack, so if anyone could get me a few pointers or maybe examples or any kind of documentation about this I'd be very grateful.

感谢您事先的任何帮助。

Thanks in advance for any help.

推荐答案

这是Android的项目中，我目前正在出版一用户的位置使用aSmack和放他们的XMPP名册的朋友需要定期; XEP-0080。

An Android project I’m currently working on required periodically publishing a user’s location to their XMPP roster friends using aSmack & XEP-0080.

原来麻烦比我所希望的，所以我记录我的解决方案在这里：的http://www.dbotha.com/2014/11/02/xep-0080-user-location-on-android-using-pep-with-smack/

It turned out trickier than I would have liked so I documented my solution here: http://www.dbotha.com/2014/11/02/xep-0080-user-location-on-android-using-pep-with-smack/

有关完整性我在这里介绍的重要组成部分。在简洁的利益来自XEP-0080规范的唯一XML子元素，我将介绍的是那些与经度和纬度。

For completeness I'll cover the important parts here. In the interest of brevity the only XML child elements from the XEP-0080 specification that I’ll cover are those relating to latitude and longitude.

一个PEPItem保存用户位置，并将其转换成相应的XML：

A PEPItem to hold the user location and transform it into the appropriate XML:

public class UserLocation extends PEPItem {

    public static final String NODE =
        "http://jabber.org/protocol/geoloc";

    public final double latitude, longitude;

    public UserLocation(double latitude, double longitude) {
        this(StringUtils.randomString(16), latitude, longitude);
    }

    public UserLocation(double latitude, double longitude,
            String id) {
        super(id);
        this.latitude = latitude;
        this.longitude = longitude;
    }

    @Override
    java.lang.String getNode() {
        return NODE;
    }

    // return an XML element approximately inline
    // with the XEP-0080 spec
    @Override
    java.lang.String getItemDetailsXML() {
        return String.format(
            "<geoloc xmlns='%s'><lat>%f</lat>" +
            "<lon>%f</lon></geoloc>",
            NODE, latitude, longitude);
    }
}

一个样板大多以PEPEvent举行UserLocation PEPItem：

A mostly boilerplate PEPEvent to hold the UserLocation PEPItem:

public class UserLocationEvent extends PEPEvent {

    private final UserLocation location;

    public UserLocationEvent(UserLocation location) {
        this.location = location;
    }

    public UserLocation getLocation() {
        return location;
    }

    @Override
    public String getNamespace() {
        return "http://jabber.org/protocol/pubsub#event";
    }

    @Override
    public String toXML() {
        return String.format("<event xmlns=" +
            "'http://jabber.org/protocol/pubsub#event' >" +
            "<items node='%s' >%s</items></event>",
            UserLocation.NODE, location.toXML());
    }
}

自定义PacketExtensionProvider解析出UserLocationEvent的从传入的数据包，其中present。

A custom PacketExtensionProvider to parse out the UserLocationEvent's from incoming packets where present.

public class UserLocationProvider
        implements PacketExtensionProvider {

    // This method will get called whenever aSmack discovers a
    // packet extension containing a publish element with the
    // attribute node='http://jabber.org/protocol/geoloc'
    @Override
    public PacketExtension parseExtension(XmlPullParser parser)
            throws Exception {

        boolean stop = false;
        String id = null;
        double latitude = 0;
        double longitude = 0;
        String openTag = null;

        while (!stop) {
            int eventType = parser.next();

            switch (eventType) {
                case XmlPullParser.START_TAG:
                    openTag = parser.getName();
                    if ("item".equals(openTag)) {
                        id = parser.getAttributeValue("", "id");
                    }

                    break;

                case XmlPullParser.TEXT:
                    if ("lat".equals(openTag)) {
                        try {
                            latitude = Double.parseDouble(
                                parser.getText());
                        } catch (NumberFormatException ex) {
                            /* ignore */
                        }
                    } else if ("lon".equals(openTag)) {
                        try {
                            longitude = Double.parseDouble(
                                parser.getText());
                        } catch (NumberFormatException ex) {
                            /* ignore */
                        }
                    }

                    break;

                case XmlPullParser.END_TAG:
                    // Stop parsing when we hit </item>
                    stop = "item".equals(parser.getName());
                    openTag = null;
                    break;
            }
        }

        return new UserLocationEvent(
            new UserLocation(id, latitude, longitude));
    }
}

现在绑到一起：

XMPPTCPConnection connection = new XMPPTCPConnection();

ServiceDiscoveryManager sdm = ServiceDiscoveryManager
    .getInstanceFor(connection);
sdm.addFeature("http://jabber.org/protocol/geoloc");
sdm.addFeature("http://jabber.org/protocol/geoloc+notify");

EntityCapsManager capsManager = EntityCapsManager
    .getInstanceFor(connection);
capsManager.enableEntityCaps();

PEPProvider pepProvider = new PEPProvider();
pepProvider.registerPEPParserExtension(
    "http://jabber.org/protocol/geoloc",
    new UserLocationProvider());
ProviderManager.addExtensionProvider("event",
    "http://jabber.org/protocol/pubsub#event", pepProvider);
PEPManager pepManager = new PEPManager(connection);
pepManager.addPEPListener(PEP_LISTENER);

connection.connect();
connection.login(username, password);

最后传入LocationEvent的一个监听器：

And finally a listener for incoming LocationEvent's:

PEPListener PEP_LISTENER = new PEPListener() {
    @Override
    public void eventReceived(String from, PEPEvent event) {
        if (event instanceof UserLocationEvent) {
            // do something interesting
        }
    }
};

这篇关于使用XMPP用户位置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！