> Doesn't anyone know how to do this?

If by "this", you mean:

"I would like my app to pop up in the list of options for opening
certain file types in the various file manager, email, and web browser
apps."

Then you need to implement one or more activities, with intent filters
that contain:

-- the actions you support on the content (e.g., ACTION_VIEW, ACTION_EDIT)
-- the MIME type you support
-- the android.intent.category.ALTERNATIVE and/or the
android.intent.category.SELECTED_ALTERNATIVE as appropriate

That should enable the other applications to find you by introspection
(e.g., addIntentOptions() for menus). This assumes, of course, that the
applications in question use this facility versus something else.

> and none of the API Demos address this topic either

http://developer.android.com/guide/samples/NotePad/AndroidManifest.html

> From the single unbelievably curt
> reply I received, I get the impression that everyone thinks this is a
> stupid question.

How does one curt reply indicate that everyone thinks this is a stupid
question?

IMHO, it's more a case that very few developers are doing what you want to
do. Heck, I had to hunt and hunt and hunt a week or two ago just to find
*anything* that supported this feature.

> Is this task so incredibly easy that
> even asking the question, much less asking that it be answered, is
> considered inappropriate use of the forum?  Is that why the question
> is being ignored?

There is a lot of traffic on these lists. There are only so many people
who answer questions. There are even fewer people in position to answer
questions on dusty corners of the API such as this one. Personally, I am
teaching an Android class this week, and so am not keeping up on many
threads.

Do not assume that any given post is guaranteed to get answers,
particularly in the six-and-a-half hours (Apr 16, 4:26 pm to Apr 16, 10:55
pm) between when you asked your question your last followup.

In other words, chill out, dude.

> Besides the javadoccs, the articles in the dev guide, and the API
> Demos code, what other resource is there?

A zillion blog posts, anddev.org, JavaRanch's Android board,
AndroidSnippets.org, a half-dozen books, some knols, ...

> It's time to ask a question and have someone answer it.

You only waited 6.5 hours for an answer. If you want guaranteed feedback
in that short of a timeframe, hire a consultant.

Otherwise, give any query 24-48 hours, then if needed repost with a
*bump*. Or, try posting in other forums (e.g., anddev.org, JavaRanch),
etc.

-- 
Mark Murphy (a Commons Guy)
http://commonsware.com
_The Busy Coder's Guide to Android Development_ Version 2.0 Available!



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