diff --git a/Application/src/main/java/com/xypower/mppreview/Camera2RawFragment.java b/Application/src/main/java/com/xypower/mppreview/Camera2RawFragment.java
index 4cc51db..315d7d8 100644
--- a/Application/src/main/java/com/xypower/mppreview/Camera2RawFragment.java
+++ b/Application/src/main/java/com/xypower/mppreview/Camera2RawFragment.java
@@ -1006,6 +1006,15 @@ public class Camera2RawFragment extends Fragment
         }
     }
 
+    private Size getLargestResolution(StreamConfigurationMap map, int format) {
+        Size[] resolutions = map.getHighResolutionOutputSizes(format);
+        if (resolutions == null || resolutions.length == 0) {
+            resolutions = map.getOutputSizes(format);
+        }
+        Size largestJpeg = Collections.max(Arrays.asList(resolutions), new CompareSizesByArea());
+        return largestJpeg;
+    }
+
     /**
      * Configure the necessary {@link android.graphics.Matrix} transformation to `mTextureView`,
      * and start/restart the preview capture session if necessary.