android.preference.MultiSelectListPreference#setSummary ( )源码实例Demo

private void updateReminderDaysSummary(MultiSelectListPreference daysPreference,
                                       Set<String> savedValues) {
    if (savedValues == null || savedValues.size() == 0) {
        daysPreference.setSummary(getActivity().getResources().getString(
                R.string.no_days_selected));
        return;
    }
    List<String> daysEntries = Arrays.asList(getActivity().getResources()
            .getStringArray(R.array.reminder_days_titles));
    List<String> daysEntriesValues = Arrays.asList(getActivity().getResources()
            .getStringArray(R.array.reminder_days_values));
    String summary = "";
    for (int i = 0; i < daysEntriesValues.size(); i++) {
        if (savedValues.contains(daysEntriesValues.get(i))) {
            if (!TextUtils.isEmpty(summary)) {
                summary += ", ";
            }
            summary += daysEntries.get(i);
        }
    }
    daysPreference.setSummary(summary);
}
 

private void loadGroup() {
    // Consider adding more features here, such as those in Track and TrackPreferenceFragment
    name = (EditTextPreference) findPreference("name");
    name.setText(group.getName());
    name.setSummary(group.getName());

    description = (EditTextPreference) findPreference("description");
    description.setText(group.getDescription());
    description.setSummary(group.getDescription());

    mTracksPref = (MultiSelectListPreference) findPreference("tracks");
    mTracksPref.setValues(getTrackIdsForGroupAsSet(group.getId()));

    mTracksPref.setEntries(getAllTrackNamesAsCharSeq());
    mTracksPref.setEntryValues(getAllTrackIdsAsCharSeq());
    mTracksPref.setSummary(getTrackNamesForSummary());

}
 

/**
 * Helper Class to setup the default Unit Type preference list in code
 */
private void setUpUnitTypePrefs() {
   PreferenceScreen screen = getPreferenceScreen();
   MultiSelectListPreference listPref = new MultiSelectListPreference(super.getActivity());
   listPref.setOrder(0);
   listPref.setDialogTitle(R.string.unit_select_title);
   listPref.setKey(UNIT_TYPE_PREF_KEY);
   listPref.setSummary(R.string.unit_select_summary);
   listPref.setTitle(R.string.unit_select_title);
   listPref.setEntries(getUnitTypeNameArray(getResources()));

   String[] keyArray = getUnitTypeKeyArray(getResources());
   listPref.setEntryValues(keyArray);

   final Set<String> result = new HashSet<>();
   Collections.addAll(result, keyArray);

   listPref.setDefaultValue(result);

   screen.addPreference(listPref);
}
 

private void setSummaries() {
    final String wifiOnly = preferences.getString(PBConstants.PREF_WIFI_ONLY,
            getResources().getString(R.string.only_wifi_default)); // default
    final ListPreference wifiPreference = (ListPreference) findPreference(PBConstants.PREF_WIFI_ONLY);
    wifiPreference.setSummary(wifiOnly);

    final String recentUploadOnly = preferences.getString(PBConstants.PREF_RECENT_UPLOAD_ONLY,
            getResources().getString(R.string.only_recent_upload_default)); // default
    final ListPreference recentUploadPreference = (ListPreference) findPreference(PBConstants.PREF_RECENT_UPLOAD_ONLY);
    recentUploadPreference.setSummary(recentUploadOnly);

    final String serverUrl = preferences.getString(PBServerPreferenceFragment.PREF_SERVER_URL, null);
    if (serverUrl != null) {
        final String serverName = preferences.getString(PBConstants.PREF_SERVER, null);
        if (serverName != null) {
            final PBServerListPreference serverPreference = (PBServerListPreference) findPreference(PBConstants.PREF_SERVER);
            serverPreference.setSummary(serverName + " @ " + serverUrl);

            // bonus: left icon of the server
            final int serverNamesId = getResources().getIdentifier("pref_server_names", "array", getActivity().getPackageName());
            final String[] serverNames = getResources().getStringArray(serverNamesId);
            final int serverPosition = Arrays.asList(serverNames).indexOf(serverName);
            final int serverIconsId = getResources().getIdentifier("pref_server_icons", "array", getActivity().getPackageName());
            final String[] serverIcons = getResources().getStringArray(serverIconsId);
            final String serverIcon = serverIcons[serverPosition];
            final String[] parts = serverIcon.split("\\.");
            final String drawableName = parts[parts.length - 1];
            final int id = getResources().getIdentifier(drawableName, "drawable", getActivity().getPackageName());
            if (id != 0) {
                serverPreference.setIcon(id);
            }
        }
    }

    String bucketSummary = "";
    final Set<String> selectedBuckets = preferences.getStringSet(PBConstants.PREF_PICTURE_FOLDER_LIST, null);
    if (selectedBuckets != null && bucketNames != null) {
        final ArrayList<String> selectedBucketNames = new ArrayList<>();
        for (String entry : selectedBuckets) {
            String oneName = bucketNames.get(entry);
            if (oneName != null) {
                oneName = oneName.substring(0, oneName.lastIndexOf('(') - 1);
                selectedBucketNames.add(oneName);
            }
        }
        bucketSummary = TextUtils.join(", ", selectedBucketNames);
    }
    final MultiSelectListPreference bucketListPreference = (MultiSelectListPreference) findPreference(PBConstants.PREF_PICTURE_FOLDER_LIST);
    bucketListPreference.setSummary(bucketSummary);
}
 

private void updateSummary(MultiSelectListPreference pref) {
    pref.setSummary(Arrays.toString(pref.getValues().toArray()));
}