private void generateInboxStyleNotification()

in Notifications/Wearable/src/main/java/com/example/android/wearable/wear/wearnotifications/StandaloneMainActivity.java [506:604]
48 lines of code
3 McCabe index (conditional complexity)

    private void generateInboxStyleNotification() {

        Log.d(TAG, "generateInboxStyleNotification()");


        // Main steps for building a INBOX_STYLE notification:
        //      0. Get your data
        //      1. Create/Retrieve Notification Channel for O and beyond devices (26+)
        //      2. Build the INBOX_STYLE
        //      3. Set up main Intent for notification
        //      4. Build and issue the notification

        // 0. Get your data (everything unique per Notification).
        MockDatabase.InboxStyleEmailAppData inboxStyleEmailAppData =
                MockDatabase.getInboxStyleData();

        // 1. Create/Retrieve Notification Channel for O and beyond devices (26+).
        String notificationChannelId =
                NotificationUtil.createNotificationChannel(this, inboxStyleEmailAppData);

        // 2. Build the INBOX_STYLE
        InboxStyle inboxStyle = new NotificationCompat.InboxStyle()
                // This title is slightly different than regular title, since I know INBOX_STYLE is
                // available.
                .setBigContentTitle(inboxStyleEmailAppData.getBigContentTitle())
                .setSummaryText(inboxStyleEmailAppData.getSummaryText());

        // Add each summary line of the new emails, you can add up to 5.
        for (String summary : inboxStyleEmailAppData.getIndividualEmailSummary()) {
            inboxStyle.addLine(summary);
        }

        // 3. Set up main Intent for notification.
        Intent mainIntent = new Intent(this, InboxMainActivity.class);

        PendingIntent mainPendingIntent =
                PendingIntent.getActivity(
                        this,
                        0,
                        mainIntent,
                        PendingIntent.FLAG_UPDATE_CURRENT
                );

        // 4. Build and issue the notification.

        // Because we want this to be a new notification (not updating a previous notification), we
        // create a new Builder. However, we don't need to update this notification later, so we
        // will not need to set a global builder for access to the notification later.

        // Notification Channel Id is ignored for Android pre O (26).
        NotificationCompat.Builder notificationCompatBuilder =
                new NotificationCompat.Builder(
                        getApplicationContext(), notificationChannelId);

        GlobalNotificationBuilder.setNotificationCompatBuilderInstance(notificationCompatBuilder);

        notificationCompatBuilder
                // INBOX_STYLE sets title and content.
                .setStyle(inboxStyle)
                .setContentTitle(inboxStyleEmailAppData.getContentTitle())
                .setContentText(inboxStyleEmailAppData.getContentText())
                .setSmallIcon(R.drawable.ic_launcher)
                .setLargeIcon(BitmapFactory.decodeResource(
                        getResources(),
                        R.drawable.ic_person_black_48dp))
                .setContentIntent(mainPendingIntent)
                .setDefaults(NotificationCompat.DEFAULT_ALL)
                // Set primary color (important for Wear 2.0 Notifications).
                .setColor(ContextCompat.getColor(getApplicationContext(), R.color.colorPrimary))

                // Sets large number at the right-hand side of the notification for Wear 1.+.
                .setSubText(Integer.toString(inboxStyleEmailAppData.getNumberOfNewEmails()))

                .setCategory(Notification.CATEGORY_EMAIL)

                // Sets priority for 25 and below. For 26 and above, 'priority' is deprecated for
                // 'importance' which is set in the NotificationChannel. The integers representing
                // 'priority' are different from 'importance', so make sure you don't mix them.
                .setPriority(inboxStyleEmailAppData.getPriority())

                // Sets lock-screen visibility for 25 and below. For 26 and above, lock screen
                // visibility is set in the NotificationChannel.
                .setVisibility(inboxStyleEmailAppData.getChannelLockscreenVisibility())
                // Notifies system that the main launch intent is an Activity.
                .extend(new NotificationCompat.WearableExtender()
                        .setHintContentIntentLaunchesActivity(true));

        // If the phone is in "Do not disturb mode, the user will still be notified if
        // the sender(s) is starred as a favorite.
        for (String name : inboxStyleEmailAppData.getParticipants()) {
            notificationCompatBuilder.addPerson(name);
        }

        Notification notification = notificationCompatBuilder.build();
        mNotificationManagerCompat.notify(NOTIFICATION_ID, notification);

        // Close app to demonstrate notification in steam.
        finish();
    }