October 2011
Beginner to intermediate
400 pages
9h 55m
English
Content preview from Beginning Flash®, Flex®, and AIR® Development for Mobile Devices
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6
Debugging Applications
WHAT YOU WILL LEARN IN THIS CHAPTER:
- Setting breakpoints in source code and using the Breakpoints panel
- Using the Flash Debug Perspective in Flash Builder
- Utilizing the Variables panel
- Global error handling
- Handling uncaught errors
- Using Try...Catch statements
- Stepping through source code
In this chapter you'll take a closer look at using Flash Builder to debug applications using the Flash Debug Perspective.
Flash Builder offers debugging capabilities that allow you to find bugs within your application. The Debug panel allows you to stop and start the mobile application to find problems, or to examine or substitute values for variables.
This chapter covers example code that intentionally introduces a bug from the outset. You then go through a series of tools and techniques to identify and fix the issue using the Debug Perspective in Flash Builder.
SETTING BREAKPOINTS
In this section you create the Debugging App project in Flash Builder and take a look at setting breakpoints for specific lines in source code.
Setting Breakpoints
The following steps will guide you through using the Flash Debug Perspective. First take a look at utilizing breakpoints in the Source view.
- In Flash Builder create a new Flex Mobile project and call it Debugging App (Figure 6-1).
FIGURE 6-1: New Flex Mobile Project panel for the Debugging App in Flash Builder
- In DebuggingAppHome.mxml ...
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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.