Interface CommandListener

public interface CommandListener

This interface is used by applications which need to receive high-level events from the implementation. An application will provide an implementation of a Listener (typically by using a nested class or an inner class) and will then provide an instance of it on a Screen in order to receive high-level events on that screen.

The specification does not require the platform to create several threads for the event delivery. Thus, if a Listener method does not return or the return is not delayed, the system may be blocked. So, there is the following note to application developers:

See Also:

Method Summary
 void commandAction(Command c, Displayable d)
          Indicates that a command event has occurred on Displayable d.

Method Detail


void commandAction(Command c,
                   Displayable d)
Indicates that a command event has occurred on Displayable d.

Note for application developer: the method should return immediately.

c - a Command object identifying the command. This is either one of the applications have been added to Displayable with addCommand(Command) or is the implicit SELECT_COMMAND of List.
d - the Displayable on which this event has occurred

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