March 2002
Intermediate to advanced
480 pages
18h 40m
English
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Name
Alert
Synopsis
Alert is a subclass of Screen that
behaves somewhat like a dialog. There are several standard
Alert styles that can be used; the style is specified using
an AlertType object which may be supplied when the
Alert is constructed or using the
setType() method.
An Alert has a title, a message, and an image. These
attributes may be set at construction time or using the
setTitle(), setString() and
setImage() methods. An Alert with no
image may be created by calling setImage()
with argument null. The way in which the
Alert is rendered is platform-dependent. A device is not
required to display an image and, even if it does, need not display the
image suggested by the application. However, if the platform
displays an image at all, changing the AlertType
results in a different image being drawn on the Alert.
An image explicitly supplied at construction time or using
setImage() would override the default one associated with
the AlertType.
An Alert will usually be displayed for a fixed length of
time, after which it will be removed from the display and the screen previously
on view will be restored. The display time may be specified using the
setTimeout() method, which requires an argument in milliseconds.
The special value Alert.FOREVER may be used to create an
Alert that remains visible until the user explicitly
dismisses it using a control (usually a button) provided by the platform for
that purpose. The default time for which an Alert will be displayed (if no explicit ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.