Android Question How to Set Wallpapers for Home Screen, Lock Screen, or Both Separately?

[Javaneh]

Hi everyone,
I have some questions and issues related to setting images as wallpapers :

1. How can I set an image specifically for the home screen, the lock screen, or both? I couldn’t find separate code examples for each of these.
2. How can I detect if setting the wallpaper was successful? Something similar to the "Wait For" command. For example, I’d like to show a toast message upon success or failure.
3. I used the following code shared by @Erel on the forum.
   
   
       Dim wallpaper As JavaObject
       Dim context As JavaObject
       context.InitializeContext
       wallpaper = wallpaper.InitializeStatic("android.app.WallpaperManager").RunMethod("getInstance", Array(context))
       wallpaper.RunMethod("setBitmap", Array(bim))
   
   This code simultaneously sets the wallpaper for both the home screen and the lock screen. However, the problem is that when I use this code to set the wallpaper, it takes a few seconds, and then the activity (or the entire app) reloads or refreshes. (In my future projects, I plan to use B4XPages .) I'm not sure why this happens. Additionally,
   I’m using RecyclerView and the SMM library for this task.

Thank you!

 

[Erel]

You can use this code to select the target(s):

Private Sub SetWallpaper(bmp As B4XBitmap, LockScreen As Boolean, HomeScreen As Boolean)
    Dim wallpaper As JavaObject
    Dim context As JavaObject
    context.InitializeContext
    wallpaper = wallpaper.InitializeStatic("android.app.WallpaperManager").RunMethod("getInstance", Array(context))
    Dim flags As Int = 0
    If LockScreen Then flags = Bit.Or(flags, 2)
    If HomeScreen Then flags = Bit.Or(flags, 1)
    wallpaper.RunMethod("setBitmap", Array(bmp, Null, True, flags))
End Sub

The intent that was broadcasted when the wallpaper changes, in older versions of Android, is no longer available. I guess that if no exception is raised then you can assume that it was successful.

And you cannot prevent the activity from being recreated. This is a special case that is also true with B4XPages.