Intents como EnvelopesYouTube↗  IA↗(long shot)
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I like to think of intense as envelopes each one includes who or in this case
I like to think of intents as envelopes, each one who includes who,
which component you want to deliver to
or in this case, which component you want it delivered to.
and there's room for a small amount of data to be delivered packaged as extras
And there's room for a small amount of data to be delivered, packaged as extras.
primitive tuples that will be available
Primitive tuples that will be available to the application component
to the application component that ultimately receives and opens this intent so an explicit intent explicitly specifies the name of the recipient as
that ultimately receives and opens this intent. An explicit intent explicitly specifies the name of the recipient,
you can see on this envelope implicit
as you can see on this envelope.
intents are rather more interesting here
Implicit intents are a lot more interesting.
we don't specify the name of the class
Here, we don't specify the name of the class.
we don't even know what it is so how do
We don't even know what it is.
we indicate which activity to launch
So, how do we indicate which activity to launch?
well you know those stories you
You know those stories you sometimes hear about letters
sometimes hear about letters with vague addresses like these that somehow still
with fake addresses like these that somehow still find
find their way to the intended recipient
their way to the recipient?
well the intent resolution system on Android works the same way finding an
Well the intent resolution system on Android works the same way,
activity capable forming the action you
finding an activity capable of performing the action
specify on the Associated data so rather
you specify on the associated data.
than specifying the name of a class you
So, rather than specifying the name of a class, you indicate
indicate an action you'd like an
an action you'd like an activity to perform,
activity to perform and on what data that action should be performed like
and on what data that action should be performed.
this where we want to address an
Like this, where we want to address an activity
activity that's capable of viewing a website and because intents can cross
that's capable of viewing a website. And because intents can cross
through application boundaries the
through application boundaries, the activity that started
activity that started may not be part of your app so you can include
may not be part of your app. So, you can include functionality
functionality like this browsing websites or making phone calls or
like this, browsing websites or making phone calls
choosing a contact from your address
or choosing a contact from your address book,
book or from within your app without you
all from within your app, without you having to implement
having to implement any of it yourself
any of it yourself.
you don't even need to know about the
You don't even need to know about the app
app that will ultimately service your request you can find details of some of
that will ultimately service your request. You can find details
the intent supported by native apps in
of some of the intents supported by native apps
common intents page of the Android developer site
in Common Intents page of the Android developer site.
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