diff --git a/common/device/com/android/net/module/util/Struct.java b/common/device/com/android/net/module/util/Struct.java
index 6d8d301..07a7e7a 100644
--- a/common/device/com/android/net/module/util/Struct.java
+++ b/common/device/com/android/net/module/util/Struct.java
@@ -602,4 +602,9 @@
         writeToByteBufferInternal(buffer, fieldInfos);
         return output;
     }
+
+    /** Convert the parsed Struct subclass object to byte array with native order. */
+    public final byte[] writeToBytes() {
+        return writeToBytes(ByteOrder.nativeOrder());
+    }
 }
diff --git a/common/tests/unit/src/com/android/net/module/util/StructTest.java b/common/tests/unit/src/com/android/net/module/util/StructTest.java
index 47b34b9..d5e27fb 100644
--- a/common/tests/unit/src/com/android/net/module/util/StructTest.java
+++ b/common/tests/unit/src/com/android/net/module/util/StructTest.java
@@ -697,4 +697,23 @@
         assertThrows(IllegalArgumentException.class,
                 () -> Struct.parse(BadMacAddressType.class, toByteBuffer("ffffffffffff")));
     }
+
+    @Test
+    public void testStructToByteArray() {
+        final SignedDataMessage littleEndianMsg = doParsingMessageTest(SIGNED_DATA,
+                SignedDataMessage.class, ByteOrder.LITTLE_ENDIAN);
+        assertArrayEquals(toByteBuffer(SIGNED_DATA).array(),
+                littleEndianMsg.writeToBytes(ByteOrder.LITTLE_ENDIAN));
+
+        final SignedDataMessage bigEndianMsg = doParsingMessageTest(SIGNED_DATA,
+                SignedDataMessage.class, ByteOrder.BIG_ENDIAN);
+        assertArrayEquals(toByteBuffer(SIGNED_DATA).array(),
+                bigEndianMsg.writeToBytes(ByteOrder.BIG_ENDIAN));
+
+        final SignedDataMessage nativeOrderMsg = ByteOrder.nativeOrder().equals(
+                ByteOrder.LITTLE_ENDIAN) ? littleEndianMsg : bigEndianMsg;
+        assertArrayEquals(toByteBuffer(SIGNED_DATA).array(),
+                nativeOrderMsg.writeToBytes());
+
+    }
 }