Eclipse RCP - 如何以编程方式从PreferenceStore检索RadioGroupFieldEditor存储的首选项？

Question

I have a preferences page, where some radio buttons are controlled by a RadioGroupFieldEditor .

setPreferenceStore(Activator.getDefault().getPreferenceStore());
....

addField(new RadioGroupFieldEditor("CHOICE",
    "An example of a multiple-choice preference", 1,
    new String[][] { { "&Choice 1", "choice1" },
            { "C&hoice 2", "choice2" } }, getFieldEditorParent()));

Question:
How can I retrieve the data (stored by the fieldEditor) from the PreferenceStore programmatically? How does the storage structure look like?

Answer 1

The RadioGroupFieldEditor is going to store a single string for you. It will be the string associated with the radio button in the group that was selected, and it will be keyed off of the name you gave to the group itself.

In other words, given your example, calling:

Activator.getDefault().getPreferenceStore().getString("CHOICE");

...will return either "choice1" or "choice2", depending on which radio button was selected on your preference page when the preferences were saved.