Use compat adaptive icons for themed icon packs

docs/docs/developer-guide/integrations/icon-packs.md

@@ -243,10 +243,9 @@ icons.
 
 Themed icons can be provided in any of the following ways:
 
-- If the icon is an adaptive icon, the device runs at least Android 13 and the drawable has
+- If the icon is an adaptive icon, and the drawable has
   a `<monochrome>` layer, this icon will be used as the themed icon.
-- If the icon is an adaptive icon, and it does not have a `<monochrome>` layer or the device runs on
-  Android 12 or lower, the foreground layer will be used.
+- If the icon is an adaptive icon, and it does not have a `<monochrome>` layer, the foreground layer will be used.
 - If the icon is not an adaptive icon, the entire icon will be used.
 
 In any case, the icon will be tinted using the theme color and the background will be set to a solid

services/icons/src/main/java/de/mm20/launcher2/icons/IconPackManager.kt

@@ -19,6 +19,8 @@ import androidx.core.content.res.ResourcesCompat
 import androidx.core.graphics.drawable.toBitmap
 import androidx.room.withTransaction
 import de.mm20.launcher2.database.AppDatabase
+import de.mm20.launcher2.icons.compat.AdaptiveIconDrawableCompat
+import de.mm20.launcher2.icons.compat.toLauncherIcon
 import de.mm20.launcher2.icons.loaders.AppFilterIconPackInstaller
 import de.mm20.launcher2.icons.loaders.GrayscaleMapIconPackInstaller
 import de.mm20.launcher2.ktx.isAtLeastApiLevel
@@ -247,6 +249,11 @@ class IconPackManager(
         val resId =
             resources.getIdentifier(icon.drawable, "drawable", icon.iconPack).takeIf { it != 0 }
                 ?: return null
+
+        val adaptiveIconCompat = AdaptiveIconDrawableCompat.from(resources, resId)
+        if (adaptiveIconCompat != null) {
+            return adaptiveIconCompat.toLauncherIcon(themed = allowThemed && icon.themed)
+        }
         val drawable = try {
             ResourcesCompat.getDrawable(resources, resId, context.theme) ?: return null
         } catch (e: Resources.NotFoundException) {
@@ -342,9 +349,18 @@ class IconPackManager(
         resources: Resources,
         allowThemed: Boolean,
     ): LauncherIcon? {
-        var drawable = try {
+        val drawableId = try {
             resources.getIdentifier(icon.drawable, "drawable", icon.iconPack).takeIf { it != 0 }
-                ?.let { ResourcesCompat.getDrawable(resources, it, null) }
+                ?: return null
+        } catch (e: Resources.NotFoundException) {
+            return null
+        }
+        val adaptiveIconCompat = AdaptiveIconDrawableCompat.from(resources, drawableId)
+        if (adaptiveIconCompat != null) {
+            return adaptiveIconCompat.toLauncherIcon(icon.themed && allowThemed, icon.config)
+        }
+        val drawable = try {
+            ResourcesCompat.getDrawable(resources, drawableId, null)
         } catch (e: Resources.NotFoundException) {
             null
         } ?: return null