By Chris King
BlackBerry units and purposes are promoting by way of the thousands. As a BlackBerry developer, you wish a complicated ability set to effectively make the most the main compelling positive factors of the platform. This booklet can assist you advance that ability set and educate you the way to create the main subtle BlackBerry courses attainable. With complex BlackBerry improvement, you are going to study you ways to exploit BlackBerry media services, together with the digicam and video playback. The publication additionally exhibits you the way to ship and obtain textual content and multimedia messages, use robust cryptography libraries, and fasten with the user's own and enterprise contacts and calendar.
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Additional resources for Advanced BlackBerry Development
The sample code below shows how to open a particular type of connection and clean it up once done. open(connectString); // Read from the connection here. info CHAPTER 1: Getting Started File Access File connections are not part of core Java ME, but are specified as part of JSR 75, which all modern BlackBerry devices offer. File connections allow you to read and write files within the BlackBerry device’s built-in storage or an SD (Secure Digital) card. This capability allows you to offer extra storage in your app, produce useful files for the user, or communicate with other apps on the phone.
PlayTone() that would generate a single note. The widespread adoption of compressed audio has rendered this method largely useless, and its presence in the API feels like an anachronism. The Life of a Player Player instances have a standard lifecycle. As handheld devices (even BlackBerry devices) have fewer resources available than desktop computers, the MMAPI strives to keep as light a footprint as possible. Therefore, resources will only be acquired as they are necessary. You can queue up multiple media operations without worrying too much about memory usage, and MMAPI will automatically provide them with appropriate access as needed.
Standard controls for menu actions and other commonly used elements. Once your app starts the event dispatcher, it will behave similarly to a MIDlet: it will be notified when important events occur and can take actions in response. info 17 18 CHAPTER 1: Getting Started CLDC UI Screen objects form the building blocks for CLDC applications. lcdui package. A Screen typically contains one or more displayable items, and also performs specialized logic related to those items. If you were writing a calendar app, you might use one screen to show the entire calendar view, another screen for creating new appointments, and a third screen to view previously entered appointments.