diff --git a/visionSamples/barcode-reader/app/src/main/java/com/google/android/gms/samples/vision/barcodereader/ui/camera/CameraSource.java b/visionSamples/barcode-reader/app/src/main/java/com/google/android/gms/samples/vision/barcodereader/ui/camera/CameraSource.java
index 430fd746..6381ea09 100644
--- a/visionSamples/barcode-reader/app/src/main/java/com/google/android/gms/samples/vision/barcodereader/ui/camera/CameraSource.java
+++ b/visionSamples/barcode-reader/app/src/main/java/com/google/android/gms/samples/vision/barcodereader/ui/camera/CameraSource.java
@@ -44,6 +44,7 @@
 import java.lang.annotation.RetentionPolicy;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -909,6 +910,12 @@ private static List<SizePair> generateValidPreviewSizeList(Camera camera) {
                 parameters.getSupportedPreviewSizes();
         List<android.hardware.Camera.Size> supportedPictureSizes =
                 parameters.getSupportedPictureSizes();
+
+        int lastIndex = supportedPictureSizes.size() - 1;
+        if (supportedPictureSizes.get(0).height < supportedPictureSizes.get(lastIndex).height) {
+            Collections.reverse(supportedPictureSizes);
+        }
+
         List<SizePair> validPreviewSizes = new ArrayList<>();
         for (android.hardware.Camera.Size previewSize : supportedPreviewSizes) {
             float previewAspectRatio = (float) previewSize.width / (float) previewSize.height;