Advanced BlackBerry Development by Chris King

By Chris King

BlackBerry units and purposes are promoting through the thousands. As a BlackBerry developer, you would like a complicated ability set to effectively take advantage of the main compelling positive factors of the platform. This e-book may help you boost that ability set and educate you ways to create the main refined BlackBerry courses attainable. With complicated BlackBerry improvement, you are going to examine you the way to exploit BlackBerry media features, together with the digicam and video playback. The booklet additionally exhibits you the way to ship and obtain textual content and multimedia messages, use strong cryptography libraries, and fix with the user's own and company contacts and calendar.

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However, if you hope to run on many different devices, you will need to be prepared to handle situations where the device doesn’t support an operation. Chapter 10 provides much more detail on strategies to solve this problem. Fortunately, though, there is a clean way to determine at runtime whether the user’s device can succeed. MMAPI defines a standard set of system properties, including the mediarelated properties shown in Table 2-2. getProperty() with a given property name, you can determine what the device supports.

Spend as much time as you like on these or other improvements. Once you feel comfortable with making and testing changes, you are ready to move on. Excelsior You have crossed the first threshold for writing advanced BlackBerry apps. Although the treatment in this chapter has been brief, you have learned the essentials for writing useful BlackBerry apps. You now have a functioning environment that allows you to write, test, and deploy your application on the simulator and on BlackBerry devices. You have learned the differences between MIDlets, BlackBerry CLDC applications, and library modules, and when to use each.

Depending on the type of capture you’re doing, you’ll have access to different Control objects, each with its own mechanism for accessing the correct data. If you are taking a snapshot, you can call a synchronous method on VideoControl that will return you the bytes for that shot. If you are capturing audio, you can obtain a RecordControl object and provide it with a file name or output stream that should be used to store the data. Generally speaking, once you have finished your recording, you should get the data and then close the Player as soon as possible.

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