Android Question How to create a Full-Screen Notification in B4A for Android 9?

[madrigal115]

Hello,
I am trying to show a full-screen notification in B4A when a new order arrives. I want it to open an Activity called Request.




Here is my code snippet:

Dim n As NB6
Dim cs As CSBuilder
Dim bmpSign As Bitmap = LoadBitmapResize(File.DirAssets, "sign.png", 24dip, 24dip, False)
Dim title As Object = cs.Initialize.Color(Colors.Red).Append("Caution:").PopAll
Dim Content As Object = cs.Initialize.Append("This app may drain your battery!").PopAll
Dim largeIcon As Bitmap = LoadBitmapResize(File.DirAssets, "Small Cartoon.png", 256dip, 256dip, True)
n.Initialize("default", Application.LabelName, "DEFAULT").AutoCancel(True).SmallIcon(bmpSign)
n.LargeIcon(largeIcon)
' Here I want to open Request Activity
' n.FullScreenIntent = ???
Return n.Build(title, Content, "tag", Me)

 

[Erel]

1.

Private Sub FullScreen_Notification
    Dim n As NB6
    n.Initialize("full_screen", Application.LabelName, "HIGH").SmallIcon(smiley)
    n.SetFullScreen(Main)
    n.Build("Title", "Content", "tag1", Main).Notify(4)
End Sub

2. Extract NB6.bas from the b4xlib and add to your project.
3. Add to that class:

Public Sub SetFullScreen(Activity As Object) As NB6
    If IsBuilder = False Then Return Me
    Dim in As Intent = CreateIntent(Activity, False)
    in.Flags = Bit.Or(268435456, 131072) 'FLAG_ACTIVITY_NEW_TASK and FLAG_ACTIVITY_REORDER_TO_FRONT
    Dim PendingIntent As Object = PendingIntentStatic.RunMethod("getActivity", Array(ctxt, Rnd(0, 0x7fffffff), in, GetPendingIntentFlag))
    NotificationBuilder.RunMethod("setFullScreenIntent", Array(PendingIntent, True))
    Return Me
End Sub

4. Add to the manifest editor:

AddPermission(Manifest.permission.USE_FULL_SCREEN_INTENT)

It is not exactly clear when it actually shows a full screen intent:

https://developer.android.com/reference/android/app/Notification.Builder#setFullScreenIntent(android.app.PendingIntent,%20boolean)

Try to lock the device before showing the notification.