sprockets/src/main/java/net/sf/sprockets/app/ui/SprocketsPreferenceFragment.java
protected void setSummary(Preference pref) {
        SharedPreferences prefs = getPreferenceManager().getSharedPreferences();
        if (pref instanceof RingtonePreference) {
            String val = prefs.getString(pref.getKey(), null);
            if (!TextUtils.isEmpty(val)) {
                Ringtone tone = RingtoneManager.getRingtone(a, Uri.parse(val));
                if (tone != null) {
                    pref.setSummary(tone.getTitle(a));
                }
            } else {
                pref.setSummary(R.string.none);
            }
        } else if (pref instanceof MultiSelectListPreference) {
            Set<String> vals = prefs.getStringSet(pref.getKey(), null);
            if (vals != null) {
                if (!vals.isEmpty()) {
                    MultiSelectListPreference multi = (MultiSelectListPreference) pref;
                    ArrayIntList indexList = new ArrayIntList(vals.size());
                    for (String val : vals) { // find selected entry indexes
                        int i = multi.findIndexOfValue(val);
                        if (i >= 0) {
                            indexList.add(i);
                        }
                    }
                    int[] indexes = indexList.toArray();
                    Arrays.sort(indexes); // to display in same order as dialog
                    pref.setSummary(TextUtils.join(getString(R.string.delimiter),
                            Elements.slice(multi.getEntries(), indexes)));
                } else {
                    pref.setSummary(R.string.none);
                }
            }
        } else if (pref instanceof EditTextPreference) {
            pref.setSummary(prefs.getString(pref.getKey(), null));
        } else if (pref.getClass().equals(Preference.class)) {
            String val = prefs.getString(pref.getKey(), null);
            if (!TextUtils.isEmpty(val)) { // don't clear existing summary
                pref.setSummary(val);
            }
        }
    }
protected void setSummary(Preference pref) {
        SharedPreferences prefs = getPreferenceManager().getSharedPreferences();
        if (pref instanceof RingtonePreference) {
            String val = prefs.getString(pref.getKey(), null);
            if (!TextUtils.isEmpty(val)) {
                Ringtone tone = RingtoneManager.getRingtone(a, Uri.parse(val));
                if (tone != null) {
                    pref.setSummary(tone.getTitle(a));
                }
            } else {
                pref.setSummary(R.string.none);
            }
        } else if (pref instanceof MultiSelectListPreference) {
            Set<String> vals = prefs.getStringSet(pref.getKey(), null);
            if (vals != null) {
                if (!vals.isEmpty()) {
                    MultiSelectListPreference multi = (MultiSelectListPreference) pref;
                    ArrayIntList indexList = new ArrayIntList(vals.size());
                    for (String val : vals) { // find selected entry indexes
                        int i = multi.findIndexOfValue(val);
                        if (i >= 0) {
                            indexList.add(i);
                        }
                    }
                    int[] indexes = indexList.toArray();
                    Arrays.sort(indexes); // to display in same order as dialog
                    pref.setSummary(TextUtils.join(getString(R.string.delimiter),
                            Elements.slice(multi.getEntries(), indexes)));
                } else {
                    pref.setSummary(R.string.none);
                }
            }
        } else if (pref instanceof EditTextPreference) {
            pref.setSummary(prefs.getString(pref.getKey(), null));
        } else if (pref.getClass().equals(Preference.class)) {
            String val = prefs.getString(pref.getKey(), null);
            if (!TextUtils.isEmpty(val)) { // don't clear existing summary
                pref.setSummary(val);
            }
        }
    }
Set the preference's value(s) as its summary.