Examples of javax.microedition.lcdui.CommandListener

javax.microedition.lcdui.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 CommandListener (typically by using a nested class or an inner class) and will then provide the instance to the addCommand method on a Displayable 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 CommandListener method does not return or the return is not delayed, the system may be blocked. So, there is the following note to application developers:
- the CommandListener method should return immediately.
@see javax.microedition.lcdui.Displayable#setCommandListener @since MIDP 1.0

                ResourceConstants.SR_SUSPEND_ALERT_MSG, null);


            AlertTimer.start();




            CommandListener ignoring = new CommandListener() {
                public void commandAction(Command c, Displayable d) {}
            };


            suspendAlert = new SystemAlert(getDisp(token), title,
                message, null, AlertType.WARNING);

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        choice.append(Resources.get(Resources.SINGLE_ENTRY), null);
    }


    protected void setData(String option) {
        if (parentScreen instanceof CommandListener) {
            CommandListener commandListener = (CommandListener)parentScreen;
            String title = getTitle();
            if (option.equals(Resources.get(Resources.ALL_RECURRENCES))) {
                if (title.equals(Resources.get(Resources.EDIT_RECURRENCE))) {
                    commandListener.commandAction(Commands.getEditAllCommand(), this);
                }
                else if (title.equals(Resources.get(Resources.DELETE_RECURRENCE))) {
                    commandListener.commandAction(Commands.getDeleteAllCommand(), this);
                }
            }
            else if (option.equals(Resources.get(Resources.SINGLE_ENTRY))) {
                if (title.equals(Resources.get(Resources.EDIT_RECURRENCE))) {
                    commandListener.commandAction(Commands.getEditSingleCommand(), this);
                }
                else if (title.equals(Resources.get(Resources.DELETE_RECURRENCE))) {
                    commandListener.commandAction(Commands.getDeleteSingleCommand(), this);
                }
            }
        }
    }

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                                                                            getCallWithChoice(),
                                                                            getPauseCharTextField(),
                                                                            getGVNumberTextField() });
            changeSettingsMenu.addCommand(getSaveSettingsCmd());
            changeSettingsMenu.addCommand(getBackCmd());
            changeSettingsMenu.setCommandListener(new CommandListener() {


                public void commandAction(Command command, Displayable displayable) {
                    if(command == saveSettingsCmd)
                    {
                        try {

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    public static Form getChangeSettingsMenu() {
        if (changeSettingsMenu == null) {
            changeSettingsMenu = new Form("Change Settings", new Item[] { getUsernameTextField(), getPasswordTextField(), getCallFromTextField(), getIntervalTextField() });//GEN-BEGIN:|233-getter|1|233-postInit
            changeSettingsMenu.addCommand(getSaveSettingsCmd());
            changeSettingsMenu.addCommand(getBackCmd());
            changeSettingsMenu.setCommandListener(new CommandListener() {


                public void commandAction(Command command, Displayable displayable) {
                    if(command == saveSettingsCmd)
                    {
                        try {

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    // private stuff
    
    private void doDismiss() {
        CommandListener commandListener = getCommandListener();
        if (commandListener == null) {
            switchToNextDisplayable(); // @deprecated - works only if 
                                       // appropriate setters were called and no command listener 
                                       // was assigned to this component
        } else {
            commandListener.commandAction(DISMISS_COMMAND,this);
        }
    }

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    }
    
    // private stuff    
    // private stuff
    private void doAction() {
        CommandListener cl = getCommandListener();
        if (cl != null) {
            if ((task != null) && task.hasFailed()) {
                cl.commandAction(FAILURE_COMMAND,this);
            } else {
                // task didn't failed - success !!!
                cl.commandAction(SUCCESS_COMMAND,this);
            }
        } else {
            // old behavior - now deprecated
            if ((task != null) && task.hasFailed() && (failureDisplayble != null))  {
                switchToDisplayable(getDisplay(), failureAlert, failureDisplayble);

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