From d9296441ea6e9940e3dcd23b31219b56ee5256aa Mon Sep 17 00:00:00 2001
From: Yacine Rezgui <yrezgui@google.com>
Date: Wed, 4 Sep 2024 16:19:30 +0200
Subject: [PATCH] Fix failing Ultra HDR sample on emulator

---
 .../graphics/ultrahdr/opengl/UltraHDRWithOpenGL.kt         | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/samples/graphics/ultrahdr/src/main/java/com/example/platform/graphics/ultrahdr/opengl/UltraHDRWithOpenGL.kt b/samples/graphics/ultrahdr/src/main/java/com/example/platform/graphics/ultrahdr/opengl/UltraHDRWithOpenGL.kt
index 212bf6fb..becc8c74 100644
--- a/samples/graphics/ultrahdr/src/main/java/com/example/platform/graphics/ultrahdr/opengl/UltraHDRWithOpenGL.kt
+++ b/samples/graphics/ultrahdr/src/main/java/com/example/platform/graphics/ultrahdr/opengl/UltraHDRWithOpenGL.kt
@@ -182,8 +182,11 @@ class UltraHDRWithOpenGL : Fragment(),
     }
 
     override fun onAttach(context: Context) {
-        requireActivity().display
-            ?.registerHdrSdrRatioChangedListener(Runnable::run, updateHdrSdrRatio)
+        requireActivity().display?.let { display ->
+            if (display.isHdrSdrRatioAvailable) {
+                display.registerHdrSdrRatioChangedListener(Runnable::run, updateHdrSdrRatio)
+            }
+        }
         super.onAttach(context)
     }