问题
This might seem like a very trivial problem but I have spent quite some time on this without finding a viable solution.
Nokia devices have a central select button,which allows us to assign soft keys to it.
According to my requirement, I need to assign a specific command as the soft key. For instance it might be "Play" on one screen and "Select" on other. Note that I have a default select command already set using:
setDefaultCommand((Command) v.elementAt(v.size() - 1));
which is always the first command in the menu at the right and is invoked when central select button is pressed.
From what I read, the way commands are assigned to each soft key is very arbitrary and varies from device to device. Since I have a default command already set, my problem can be solved in two ways:
1.By setting a soft key to the central button using
Display.getInstance().setThirdSoftButton(true);
I tried this, but the way commands are assigned is very random. Also,there is a default command "Select" always added to the menu. Is there a way to customize this so that a very specific command is shown above the central button?
2.By just assigning a label so that the default command set as above is displayed in the central soft key.
回答1:
The 3rd softbutton mode has default implementations for many focusable components but not for labels. You can customize its label by invoking setSelectCommandText(String) on the component.
I suggest that rather than using a label for a center command just use a button and set it's UIID to Label if you want it to appear as a standard label.
来源：https://stackoverflow.com/questions/13227577/central-button-soft-key-lwuit