How to programable send multi-attachment in an email

by Mike Wei » Wed, 29 Apr 2009 16:03:24 GMT

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 How to programable send multi-attachment in an email

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1. Sign data with application Key

Hi All,

I would like to authenticate piece of data coming  from signed android
Is there OS Function which would sign / provide hash of arbitrary data
with relation to key  I used to sign application?



2. Trouble understanding launching intents


I have an hypothetical app that has two activities: A (List), B
(Details). A can be launched and can itself launch B. I also have a
widget that can also launch B via the use of an PendingIntent.
Activity B looks at the Intent's extras ie1 and ie2 when created and
shows different data then.

The behavior I would like to see is A launches B. When I press HOME
and then go to a widget that itself launches B then the existing B
should be replaced by the new B with different extras (ie1 and ie2).
The new B should replace the existing B.

Also what I am seeing is when I go back HOME after seeing B that was
launched with ie1="x" and then launch B from the widget again with
ie1="y" I still get to see the old B with ie1="x".

It doesn't really matter what configuration/approach I am using now as
I am willing to completely change it. But for illustration purposes
I'd like to share a couple of things that I use or used.

I put all extras additionally into the data uri as parameters, because
it seems that the extras alone are not taken into account when
comparing Intents.

I thought from reading the documentation that launching with
category=Intent.CATEGORY_LAUNCHER and
flags=Intent.FLAG_ACTIVITY_CLEAR_TOP should do what I expected, but it

In the declaration of A and B I set clearTaskOnLaunch="true".

Anything special to take into account when launching those intents
from a PendingActivity associated with a remote view?

I found it interesting that when launching out of this context the
flags always contained Intent.FLAG_ACTIVITY_NEW_TASK (0x1), even
though *I* didn't set it. Instead I set CLEAR_TOP (0x04).

Another thing that I would like to know is how could I
configure/program it that a launch of B from the widget completely
clears the task's stack, basically like clearTaskOnLaunch, but when
firing an intent.

With all of this what I really like to avoid is that Gmail-like
BACK-{*filter*}, where I sometimes have to press BACK five to eight times to
reach the home screen. This seems to be the same problem. Opening
Gmail from the launcher, from shortcuts and from the new-mail
notification does that.

Any ideas?


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