android - 如何在 ASMACK 中解析 CustomIQ

Question

我正在为我的应用程序使用 ASMACK 库。我从我的服务器收到了以下 IQ。

<iq id='bind_2' type='result'><bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'><jid username='xx' fullname='yy'>xx@aa.bb.cc.dd/Resource</jid></bind></iq>

为了解析这个 IQ，我在设置 XmppConnection 配置时添加了 IQProvider，使用 ProviderManager 类作为

ProviderManager.getInstance().addIQProvider("bind",
                        "urn:ietf:params:xml:ns:xmpp-bind",
                        new CustomIQProvider());

我的CustomIQProvider类是

public class CustomIQProvider implements IQProvider {
    public static final String NAME_SPACE = "urn:ietf:params:xml:ns:xmpp-bind";

    @Override
    public IQ parseIQ(XmlPullParser parser) throws Exception {

        Log.i("My_TAG", "inside LivBindIQ");
        CustomIQ bindIQ = new CustomIQ();
        if (parser.getEventType() != XmlPullParser.START_TAG) {
            throw new IllegalStateException(
                    "Parser not in proper position, or bad XML.");
        }
        boolean done = false;

        while (!done) {
            int eventType = parser.next();
            if ((eventType == XmlPullParser.START_TAG)
                    && ("entry".equals(parser.getName()))) {
                eventType = parser.next();
                String name = parser.nextText();
                eventType = parser.next();
                String value = parser.nextText();
            }
            else if (eventType == XmlPullParser.END_TAG) {
                done = true;
            }
        }

        return bindIQ;

    }

}

我的 CustomIQ 类是，

public class CustomIQ extends IQ {

    @Override
    public String getChildElementXML() {
        // TODO Auto-generated method stub
        return null;
    }

    }

现在我很困惑，CustomIQProvider 类是如何执行的。我没有从 CustomIQProvider 类中获得任何日志。我的步骤是否正确，否则我需要执行任何步骤来调用我的 CustomIQProvider 类

Answer 1

也许已经有供应商注册了这个命名空间？也许您需要在 IQProvider 上对 XML 进行完整和正确的解析，并且您的 CustomIQ 需要实现 xml 的正确输出。您正在检查一个标签，显然它不存在，因此该解析器将永远无法工作。假设这是你要解析的标签

<jid username='xx' fullname='yy'>xx@aa.bb.cc.dd/Resource</jid>

我没有测试过，但这应该可以，你的 parseIQ 方法应该是这样的

public IQ parseIQ(XmlPullParser parser) throws Exception {
  CustomIQ bindIQ = new CustomIQ();
  while (!done) {
    int eventType = parser.next();
    if (eventType == XmlPullParser.START_TAG) {
        if (parser.getName().equals("jid")) {
            String username = parser.getAttributeValue("", "username");
            String fullname = parser.getAttributeValue("", "fullname");
            String jidValue = parser.nextText();

            bindIQ.setUsername(username);
            bindIQ.setFullname(fullname);
            bindIQ.setFullJid(jidValue);
        }
    }
    else if (eventType == XmlPullParser.END_TAG) {
        if (parser.getName().equals("jid")) {
            done = true;
        }
    }
  }
  return bindIQ;
}

还有您的 CustomIQ 类:

public class CustomIQ extends IQ {

  private String username;
  private String fullName;
  private String fullJid;

  public CustomIQ() {

  }

  public void setUsername(String username) {
      this.username = username;
  }

  public void setFullname(String fullName) {
      this.fullName = fullName;
  }

  public void setFullJid(String fullJid) {
      this.fullJid = fullJid;
  }

  public String getUsername() {
      return this.username;
  }

  public String getFullname() {
      return this.fullName;
  }

  public String getFullJid() {
      return this.fullJid;
  }

  @Override
  public String getChildElementXML() {
      StringBuilder builder = new StringBuilder("<bind xmlns=\"urn:ietf:params:xml:ns:xmpp-bind\"><jid username=\"");
      builder.append(username).append("\"");
      builder.append(" fullname=\"");
      builder.append(fullName).append("\"");
      builder.append(">");
      builder.append(fullJid);
      builder.append("</jid>");
      builder.append("</bind>");
      return builder.toString();
  }

}