A wallpaper manager for API33+ built to allow wallpaper retrieval by allowlisted third-party apps.
Enable third-party access in the app, then in your own app implement the following contentResolver:
contentResolver.query( /* uri = */ Uri.parse("content://io.karn.prism.WallpaperContentProvider/wallpapers"), /* projection = */ arrayOf(BaseColumns._ID, "type", "uri"), /* selection = */ null, /* selectionArgs = */ null, /* sortOrder = */ null )?.use { cursor -> try { while (cursor.moveToNext()) { val id = cursor.getLong(cursor.getColumnIndexOrThrow(BaseColumns._ID)) val type = cursor.getString(cursor.getColumnIndexOrThrow("type")) val uri = cursor.getStringOrNull(cursor.getColumnIndexOrThrow("uri")) Log.w("WallpaperContentResolver", "Resolved wallpaper: $id, $type, $uri") } } catch (e: Exception) { Log.e("TAG", "Error loading wallpapers", e) } }- The contentResolver can be used to subscribe to changes but it is not always accurate due to variations in OEM implementations of the Settings.Secure.THEME_CUSTOMIZATION_OVERLAY_PACKAGES setting. Applications can subscribe to the deprecated but still functioning Intent.ACTION_WALLPAPER_CHANGED broadcasts and combine it with the ContentResolver above.