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BlackBerry device user input and navigation

BlackBerry® devices include a keyboard, a trackwheel or trackball, and an Escape key, for input and navigation. The Escape key provides an easy way for BlackBerry device users to go back to the previous screen or remove a menu or dialog box from the screen.

A BlackBerry® Java Application for BlackBerry devices should use the following input and navigation model as closely as possible.

  • Clicking the trackwheel or trackball typically invokes a menu.
  • Pressing the Escape key changes the display to the previous screen or closes the application from the main screen.

By default, the BlackBerry screen objects provide this functionality without customization; however, you must add menu items and additional UI and navigation logic.

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