问题
I set up a preferenceScreen to edit the settings in my application. I would like to insert an EditTextPreference that contains a Title like "set your name" and a summary containing the name entered.
Is that possible? thank you in advance!
回答1:
Sure, here is a short example:
EditTextPreference etp = (EditTextPreference) findPreference("the_pref_key");
etp.setSummary("New summary");
This requires that you display your preferences either from a PreferenceActivity or from a PreferenceFragment, since findPreference() is a method of these classes. You most likely do that already.
To change the summary every time the user changes the actual preference, use a OnPreferenceChangeListener and check if the relevant key changed in the callback. After it has changed, just edit the summary like above.
来源：https://stackoverflow.com/questions/7658858/is-possible-to-change-the-summary-of-edittextpreference-dynamically-in-android