howdy, Sean!

how can I help you today?

Hello

if (getSupportFragmentManager().findFragmentByTag(MODEL) == null) {getSupportFragmentManager().beginTransaction().add(new ModelFragment(), MODEL).commit();

Ooopss...sorry

um, do you have a question?

Yes, I do. if (getSupportFragmentManager().findFragmentByTag(MODEL) == null) {getSupportFragmentManager().beginTransaction().add(new ModelFragment(), MODEL).commit();

Oopss...

Ok, when do we use fragment by tag and when do we use fragment by id?

well, to some extent, that is up to you

if you put the fragment into a container with an ID, you can use findFragmentById()

if you put the fragment into the manager with a tag, you can use findFragmentByTag()

in this case, this is a model fragment -- one with no UI -- and so therefore it has no ID

hence, I use a tag

(BTW, jwandroid33 -- I will be with you shortly!)

ok

Sean: let me take a question from jwandroid33, and I will come back to you in a bit if you have more questions

jwandroid33: do you have a question?

Ok

Yes a quick one

I wanted to ask you about page 1175 of the 4.4 book

The statement related to Android not supporting streaming MP3 in RTSP

OK

The question is:

Does that mean streaming a/v like MPEG4 video or something is supported but MP3 streams aren't? I was seeking clarity on that. Sorry if I am a bit confused

I seem to recall that RTSP supports MPEG-4

Ok

So you can stream MP4 but not MP3 audio using RTSP

well, that's complicated

RTSP is a specification

:-)

the specification does not cover streaming MP3 -- it only covers certain audio and video codecs and containers

got it

Android's implementation of streaming media playback always used to stick pretty close to the specifications

hence, Android could not stream MP3 over RTSP

because RTSP did not support streaming MP3

I see

however, various makers of RTSP servers and clients have worked out an agreement for how to stream RTSP over MP3, going beyond the specification

early on, Android did not support those

and I have no idea whether it supports this beyond-the-spec MP3 support now

That answers my question

Thanks again Mark.

sure, happy to help

(and, frankly, I am surprised that what I wrote actually helped, but, I am not going to complain...)

Sean: do you have another question?

No question.. thanks for the help.

Helped a lot because it cleared things up in my mind!

OK

jwandroid33: do you have another question?

I am good for now. If I don't talk to you before next year have a safe and happy holiday

you too!

if either of you come up with another question, before anyone else arrives, just chime in

ok

any final questions?

No I am good. Happy holiday again!

you too!

that wraps today's chat

the next office hours chat will be Thursday at 4pm Eastern