Implementation of full screen intent

[echolumaque]

Is your feature request related to a problem? Please describe.

• I got a MAUI application where it is all about a reminders for taking medicines. Now I believe this kind of stuffs is time sensitive and notification on a status bar is not enough. First idea comes to my mind is that, start an activity when a notification from your library is received. I then browsed Android documentation and found this: https://developer.android.com/guide/components/activities/background-starts. I then asked ChatGPT to further elaborate this and a piece of code caught my attention:
  

Describe the solution you'd like

• Implement .SetFullScreenIntent() when building a notification

Describe alternatives you've considered

• Tried starting an activity from the background, nothing happens. I tried using broadcast receiver to achieve it.
• Another example is the use of foreground service, unfortunately it doesn't work.

Additional context

• I found this StackOverflow thread and it's quite promising: https://stackoverflow.com/questions/65888143/what-exactly-is-full-screen-intent-in-android

[echolumaque]

@thudugala, I managed to make this work by using native notifications. However, I would like to rely fully on your library as there's some functionality I needed. How can I send an example to further assist you?

Thanks!

[thudugala]

@echolumaque you can do a PR with your change?

[echolumaque]

@echolumaque you can do a PR with your change?

I'm not that well versed with the your library's code and it would definitely took me a long time to understand it. Perhaps a blank project would work?

[thudugala]

Sure just attach a sample project here 🙂

[echolumaque]

@thudugala, you can clone this project and let me know if you have any questions: https://github.com/echolumaque/FullScreenIntentNotification

Relevant files:

https://github.com/echolumaque/FullScreenIntentNotification/tree/master/Platforms/Android/Services/AlarmServices
https://github.com/echolumaque/FullScreenIntentNotification/blob/master/Platforms/Android/MainActivity.cs

On MainActivity, you can see these code:

protected override void OnCreate(Bundle? savedInstanceState)
{
        base.OnCreate(savedInstanceState);
        SetShowWhenLocked(true);
        SetTurnScreenOn(true);
}

I believe it is necessary to wake the device and actually show the activity. More context here: https://stackoverflow.com/a/69314329/13061894. Also, I believe ShowForAllUsers must be set to true in the Activity attribute.

These permissions are also required:

<uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT" />
<uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />

Attached video is how it works: https://github.com/thudugala/Plugin.LocalNotification/assets/61021721/27defa1f-2845-4e77-a878-41f883ccbdad

To replicate:

• Add a notification
• Minimize the app in the background
• Turn off the screen

[thudugala]

@echolumaque try version 11.0.1-preview01

Make sure to set LaunchApp

 var request = new NotificationRequest
 {
     NotificationId = notificationId,
     Title = title,
     Android =
     {
        LaunchApp = new AndroidLaunch(),
     }
}

[echolumaque]

@thudugala, I've tried your instructions and unfortunately, it only just sent the notification on the status bar 😢. Tested both in simulator (Pixel 3a XL - Android 12), and physical device (Samsung Galaxy A71 - Android 12).

Here's my notification create code:

[ConfigureAwait(false)]
public async Task ScheduleNotification(string description, DateTime notifiyTime)
{
    var randomIndex = Random.Shared.Next(14);
    var notificationIcon = new AndroidIcon { ResourceName = "notif_icon" };
    var notificationRequest = new NotificationRequest
    {
        Android = new AndroidOptions
        {
            ChannelId = "com.group10.healthmate",
            IconLargeName = notificationIcon,
            IconSmallName = notificationIcon,
            IsGroupSummary = true,
            LaunchApp = new AndroidLaunch(),
            Priority = AndroidPriority.Max,
            VibrationPattern = [200, 300, 200, 300, 200, 300],
            VisibilityType = AndroidVisibilityType.Public
        },
        CategoryType = NotificationCategoryType.Alarm,
        Description = description,
        Group = "com.group10.healthmate",
        //Image = new NotificationImage
        //{
        //    FilePath
        //},
        NotificationId = Guid.NewGuid().GetHashCode(),
        Schedule = new NotificationRequestSchedule
        {
            Android = new AndroidScheduleOptions
            {
                AlarmType = AndroidAlarmType.RtcWakeup,
            },
            NotifyTime = notifiyTime,
            RepeatType = NotificationRepeat.No
        },
        Subtitle = notificationSubtitles[randomIndex],
        Title = notificationTitles[randomIndex]
    };

    await _notificationService.Show(notificationRequest);
}

Please let me know if there's help that I can do. Thanks again.

[thudugala]

@echolumaque hey can attach the full project sample?

[echolumaque]

@thudugala , hello sorry for the late reply. The project is still the same (https://github.com/echolumaque/FullScreenIntentNotification). I just pushed the changes so you can try it out. Please take a pull and let me know if how can I be of help.

Thanks again!

[pkozak2]

@echolumaque Check my last commit: https://github.com/pkozak2/FullScreenIntentNotification