Heads up Notification not working as expected

Question

I have Implemented heads up notification for my app. Code is like this:

private  String CHANNEL_ID = "message_notifications";
NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID,"message_notifications", NotificationManager.IMPORTANCE_HIGH);


@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);


    String notification_title = remoteMessage.getNotification().getTitle();
    String notification_message = remoteMessage.getNotification().getBody();

    String click_action = remoteMessage.getNotification().getClickAction();


    String user_id = remoteMessage.getData().get("user_id");
    String user_name = remoteMessage.getData().get("user_name");
    String GROUP_KEY_CHIT_CHAT = "com.android.example.Chit_Chat";


    NotificationCompat.Builder mBuilder =
            new NotificationCompat.Builder(this, CHANNEL_ID)
                    .setSmallIcon(R.drawable.chitchat_icon)
                    .setContentTitle(notification_title)
                    .setAutoCancel(true)
                    .setPriority(NotificationCompat.PRIORITY_MAX)
                    .setGroup(GROUP_KEY_CHIT_CHAT)
                    .setDefaults(Notification.DEFAULT_ALL)
                    .setVisibility(NotificationCompat.VISIBILITY_PRIVATE)
                    .setContentText(notification_message);


    if (Build.VERSION.SDK_INT >= 21) mBuilder.setVibrate(new long[0]);
    Intent resultIntent = new Intent(click_action);
    resultIntent.putExtra("user_id", user_id);
    resultIntent.putExtra("user_name",user_name);

    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
    stackBuilder.addNextIntentWithParentStack(resultIntent);
    stackBuilder.addParentStack(MainActivity.class);

    PendingIntent resultPendingIntent =
            stackBuilder.getPendingIntent(
                    0,
                    PendingIntent.FLAG_UPDATE_CURRENT
            );

    mBuilder.setContentIntent(resultPendingIntent);


    int mNotificationId = (int) System.currentTimeMillis();

    NotificationManager mNotificationManager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        mChannel.setShowBadge(true);
        mChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
        mNotificationManager.createNotificationChannel(mChannel);
        mBuilder.setChannelId(CHANNEL_ID);
    }

    mNotificationManager.notify(mNotificationId,mBuilder.build());
}

Problem is It only works correctly when I do the settings for the notification as popup and sound else it appears like simple notification. Whatsapp and other applications are by default settuped to use them. I want to do the same. I want to programmatically set the settings for my app to use heads up notification by default without going into the setting to enable it. Can anybody help me how to do that?

I need to set it to sound and popup it doesn't set by default

Answer 1

Set the importance level of notification channel to IMPORTANCE_HIGH to appears as a heads-up notification.

Set notification as ongoing using setOngoing method if you want the notification dismissed only while performing an action. Ongoing notifications cannot be dismissed by the user, so your application or service must take care of canceling them.

If you want to show the notification in Do Not Disturb mode as well you can set category to CATEGORY_ALARM

If you want an intent to launch instead of posting the notification to the status bar for demanding the user's immediate attention use setFullScreenIntent

Sample code block

        Intent launch = new Intent(context, TargetActivity.class);
        launch.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION);
        PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0,
                launch, PendingIntent.FLAG_UPDATE_CURRENT);
        createNotificationChannel(mContext, NOTIFICATION_CHANNEL_ID, NotificationManager.IMPORTANCE_HIGH,
                R.string.notification_channel_name, R.string.notification_channel_description);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(mContext, NOTIFICATION_CHANNEL_ID);
        builder.setContentTitle("Title");
        builder.setContentText("Content Text");
        builder.setStyle(new NotificationCompat.BigTextStyle()
                .bigText("Big Content Text"));
        builder.setSmallIcon(R.drawable.status_icon);
        builder.setFullScreenIntent(pendingIntent, true);
        builder.setOngoing(true);
        builder.setAutoCancel(true);
        builder.setCategory(NotificationCompat.CATEGORY_ALARM);
        builder.addAction(0, "Action Text", pendingIntent);
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(mContext);
        notificationManager.notify(COMPLETE_NOTIFICATION_ID, builder.build());

   /**
     * create Notification channel
     * @param context
     * @param channelId
     * @param channelName
     * @param channelDescription
     */
    @RequiresApi(api = Build.VERSION_CODES.O)
    public static void createNotificationChannel(Context context, String channelId, int importance, int channelName, int channelDescription) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            CharSequence name = context.getString(channelName);
            String description = context.getString(channelDescription);
            NotificationChannel channel = new NotificationChannel(channelId, name, importance);
            channel.setDescription(description);
            NotificationManager notificationManager = context.getSystemService(NotificationManager.class);
            notificationManager.createNotificationChannel(channel);
        }

    }