IssueTracker

Version: "androidx.preference:preference:1.1.0-alpha02"

When using a SummaryProvider with MultiSelectListPreference to display a summary of the currently selected items, SummaryProvider#provideSummary() is not called so the summary is not updated to represent the newly selected items. This is because notifyChanged() is not called from within setValues().

Comparison of code from ListPreference and MultiSelectListPreference

--- ListPreference ---
    public void setValue(String value) {
        // Always persist/notify the first time.
        final boolean changed = !TextUtils.equals(mValue, value);
        if (changed || !mValueSet) {
            mValue = value;
            mValueSet = true;
            persistString(value);
            if (changed) {
                notifyChanged();
            }
        }
    }
--- --- ---

--- MultiSelectListPreference ---
    public void setValues(Set<String> values) {
        mValues.clear();
        mValues.addAll(values);

        persistStringSet(values);
    }
--- --- ---

Current workaround: subclass MultiSelectListPreference and override:
        @Override
        public void setValues(Set<String> values) {
            super.setValues(values);
            notifyChanged();
        }