Sun Microsystems J2ME manual Using MediaControlSkin, Media Capture, Well-Behaved MIDlets

8.2Using MediaControlSkin

The J2ME Wireless Toolkit comes with an emulator skin, MediaControlSkin, that is focused on multimedia playback and control. The skin includes buttons with symbols representing play, stop, volume up and volume down, and other commands. To see the usefulness of MediaControlSkin, try it out with the mmademo demonstration application.

8.3Media Capture

The J2ME Wireless Toolkit emulator supports audio and video capture. Audio capture is supported by using the capture capabilities of the system upon which the emulator runs.

Video capture is supported by simulating a camera input.

See the mmademo example application for details and source code that demonstrates how to capture audio and video.

8.4Well-Behaved MIDlets

MIDlets have a life cycle that is defined in the MIDP specification. MIDlets can be paused by events such as incoming phone calls. A well-behaved MIDlet releases important device resources when it is paused and reallocates or restarts those resources when the MIDlet is resumed. In the MMAPI arena, any Players that are rendering content should be stopped when a MIDlet is paused.

The J2ME Wireless Toolkit will print a message to the console if you pause a MIDlet and it does not stop its running Players. You can test this feature yourself using the PausingVideoTest MIDlet in the mmademo demonstration application. See Appendix for details.

The warning message is printed once only for each running emulator.

66 J2ME Wireless Toolkit User’s Guide • October 2004