'Add an event to Notification swap left/right”翻译为中文是'在通知中添加事件并交换左/右侧”，这个问题的解决方法是使用代码示例来实现在通知中添加事件，并实现左右侧交换的功能。示例代码如下：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    String channelId = "my_channel_id";
    CharSequence channelName = "My Channel";
    int importance = NotificationManager.IMPORTANCE_DEFAULT;
    NotificationChannel channel = new NotificationChannel(channelId, channelName, importance);
    NotificationManager notificationManager = getSystemService(NotificationManager.class);
    notificationManager.createNotificationChannel(channel);
}

Intent intent = new Intent(this, MyActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);

NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "my_channel_id")
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("My notification")
        .setContentText("Hello World!")
        .setContentIntent(pendingIntent)
        .setStyle(new NotificationCompat.BigTextStyle()
                .bigText("Much longer text that cannot fit one line..."))
        .setPriority(NotificationCompat.PRIORITY_DEFAULT)
        .setAutoCancel(true);

Notification notification = builder.build();

notification.contentView.setViewVisibility(R.id.icon, View.VISIBLE);
notification.contentView.setViewVisibility(R.id.button_swap, View.VISIBLE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
    notification.bigContentView.setViewVisibility(R.id.button_swap, View.VISIBLE);
}

notification.contentView.setOnClickPendingIntent(R.id.button_swap, getPendingSelfIntent(this, SWAP_BUTTON));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
    notification.bigContentView.setOnClickPendingIntent(R.id.button_swap, getPendingSelfIntent(this, SWAP_BUTTON));
}

NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(notificationId, notification);

其中最后几行是实现左右侧交换功能的代码，可以根据实际需要进行修改。