Notification whose content is partially redacted on API 21 secure lockscreens

gistfile1.java

private Notification buildNotification() {
    NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
            .setCategory(NotificationCompat.CATEGORY_EVENT)
            .setVisibility(NotificationCompat.VISIBILITY_PRIVATE) // default
            .setContentTitle(title)
            .setContentText(shortText)
            .setStyle(new NotificationCompat.BigTextStyle().bigText(fullText))
            .setSmallIcon(R.drawable.ic_stat_notification)
            .setColor(context.getResources().getColor(R.color.my_color))
            .setContentIntent(intent);
    // show all the above in public contexts
    builder.setPublicVersion(builder.build());
    // only show actions when unlocked
    builder.addAction(R.drawable.ic_action, context.getString(R.string.action), actionIntent);
    return builder.build();
}