B4A Library XMPP/JABBER - Best protocol to IM for B4A

NJDude · Mar 21, 2015

That's nice, however your example is hard to follow, you should explain better what to do.

Alberto Iglesias · Mar 21, 2015

It´s easy:

1) Create your account in any Jabber server: In my test case I create in thir URL https://jabber.chaotic.de:5282/register/new
2) Connect with server
3) Login with your account created
4) Imagine you chat with somebody, the use the CreateChat method passing another person UserID ( In my case I created 2 accounts to tests)
5) Now is like you have a IM program with chat window open, then you can send and receive messages

Have a lot of servers use this protocol, like Google Talk, etc.

coslad · Mar 21, 2015

Alberto can explain us why to use xmpp in place of mqtt ?

itgirl · Mar 21, 2015

Long waited one , i have to play around with this one , thank you

Alberto Iglesias · Mar 21, 2015

Hello Coslad, Mqtt and xmpp are different concepts. One is not change for another.

MQTT is for generic use, can be used for IM too, but XMPP is more specific and matured for IM.

For example, I use MQTT for a project to future cars connected and with this project I never used XMPP.

For create Chat Groups, IM programs, I recommend XMPP.

coslad · Mar 21, 2015

Thanks Alberto , now it is a little bit more clear .
I tried your sample code but .....:

When i send the "createchat" command :
objXmpp.CreateChat(pippo@jabber.chaotic.de)
The server doesn't give me back nothing , so i don't know if the other user is on line or not .
At this point if i send a message , and , the other users are not online the message is lost.
The Event objXmpp_DeliveryComplete if fired but the message is lost.
am i wrong ?

Alberto Iglesias · Mar 21, 2015

No... It´s right!

When you Create a Chat, then in background just "open" a session then you chat... So, this event do not show nothing.

After create a Chat, try to send a message, it´s a method callback you in a DeliveryComplete

coslad · Mar 21, 2015

ok i'll try.

now , if for example i would like to implement this function i a my app, is there a server which accept registration request direct from my application .
i explain better : like every im apps the user register his account from app inside and not from a web page.
Another question , it seems that xmpp doesn't supports multi user chat, right ?

Alberto Iglesias · Mar 21, 2015

Look another library, now for B4J, and one example with video, to make more simple to understand.

https://www.b4x.com/android/forum/threads/xmpp-jabber-best-protocol-to-im-for-b4j.52105

Alberto Iglesias · Mar 21, 2015

Hey Coslad,

Each server have your own API to create accounts, depends of those API, and not the library.

You can createchat with one or more users, but the login is for one user, it´s the same like a IM program, like ICQ, Messenger, Google talk, etc

coslad · Mar 22, 2015

Hi Alberto i'm tryng your library but i found some troubles :

1) The getroster comand return the error :

java.lang.NullPointerException at java.lang.String.concat(String.java:678)

even if the client is connected and a chat is active .

2) I have User1 and User2 , User1 is the android app and User2 is the Xpmm web client.
User1(app) is connected and logged in the server
User2(web) is connected and logged too,

User2(web) sees that User1(app) is online
User2(web) send a message , the message is not delivered ,only when User1(app) set a "CreateChat" and send message to User2 (web) the message is delivered ,only after this the User2(web) can send message to User1(app)

3)User1(app) is connected , User2(web) is not connected

User1(app) createChat and send a message , it returns the event "Delivered"but delivered to who ? (User2 is not connected)

Alberto Iglesias · Mar 22, 2015

Hi Coslad,

For the 1st question I will try in here, maybe don´t having any users in chat, you get this null, I don´t know, I will check this.

For the 2nd, I think is problem the server because in my tests with server "jabber.chaotic.de" I don´t see this behavior.

Try with my tests accounts in both sides, please:

Server: jabber.chaotic.de

User1: visualnet@jabber.chaotic.de
Pwd: MyJabber2015

User2: visualfriend@jabber.chaotic.de
Pwd: MyJabber2015

coslad · Mar 22, 2015

Ok i have made a try.

1)User1 (App) , User2 (WEB)

User1 > connect > Login --Nothing else
User2(web) >Login > in the list is listed visulalfriend so i sended a message from the web to phone , but nothing happen

After:

User1(app) "createchat" and sent a message to visualnet (message is delivered)
User2(Web) > send message to visualfriend and the message is delivered

Now i have closed the web browser and have tryed to send a message from User1(app ) to User2(web offline) , the application says : objxmpp_deliverycomplete , but the user2 is offline

PS: The "Getroaster" with this two user works fine!
Maybe is there a sort of autorization before i can add a user to my list ?

coslad · Mar 22, 2015

Alberto with this two user the GetRoaster crash

App:

pippo
pippo

Web :

pluto
pluto

can you try ?

Alberto Iglesias · Mar 23, 2015

do you have in the same server? jabber.chaotic.de?

Can you send to me the server/user/pass to try in here? and debug of course....

coslad · Mar 23, 2015

The server is jabber.chaotic.de

as written in the post above :

User 1: pippo
Pass1: pippo

User2: pluto
Pass2: pluto

as web client i use https://jwchat.org/
If you set the user1(pippo) as user into your sample app and the user2 not in the app but in the web , clicking to getroaser the app crash.

obviously i set the user2 (pluto@jabber.chaotic.de) in the command "createchat"

Alberto Iglesias · Mar 23, 2015

OK. I do some tests right now

Alberto Iglesias · Mar 23, 2015

Hey Coslad,

In the asmack library I found when get the name, and is null, catch a exception..

Now I put a catch in a new version of library, try now with version 1.0.1 (I put in the first post)

public Collection<RosterEntry> getRosterEntries() {
Collection<RosterEntry> entries = roster.getEntries();
for (RosterEntry entry : entries) {
Log.d("SmackXMPP", "RosterEntry " + entry);
Log.d("SmackXMPP","User: " + entry.getUser());
Log.d("SmackXMPP","Name: " + entry.getName());
Log.d("SmackXMPP","Status: " + entry.getStatus());
Log.d("SmackXMPP","Type: " + entry.getType());
Presence entryPresence = roster.getPresence(entry.getUser());
Log.d("SmackXMPP", "Presence Status: " + entryPresence.getStatus());
Log.d("SmackXMPP", "Presence Type: "+ entryPresence.getType());
Presence.Type type = entryPresence.getType();
if (type == Presence.Type.available)
Log.d("SmackXMPP", "Presence AVIALABLE");
Log.d("SmackXMPP", "Presence : "+ entryPresence);
}

return entries;

}

coslad · Mar 23, 2015

Ok Alberto now it works !, but ....................

Why Name is = Null ?

If i use your username and password the name is .visualfriend@jabber.chaotic.de , but if i use pluto@jabber.chaotic.de as user , the name is null !
And, remain the problem that if pluto(web app) sees pippo (app) online and send a message , the message is not delivered untill pippo(app) send the createchat.
Furthermore, the web app immediately realizes if a user changes state from offline to online, while in the library there 'an event

anyway, good job!

B4A Library XMPP/JABBER - Best protocol to IM for B4A

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