diff --git a/aidl/gui/android/view/LayerMetadataKey.aidl b/aidl/gui/android/view/LayerMetadataKey.aidl
new file mode 100644
index 0000000..7026ca8
--- /dev/null
+++ b/aidl/gui/android/view/LayerMetadataKey.aidl
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+/** @hide */
+@Backing(type="int")
+enum LayerMetadataKey {
+    METADATA_OWNER_UID = 1,
+    METADATA_WINDOW_TYPE = 2,
+    METADATA_TASK_ID = 3,
+    METADATA_MOUSE_CURSOR = 4,
+}
diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 1ae148c..5959340 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -40,6 +40,7 @@
     defaults: ["libgui_bufferqueue-defaults"],
 
     srcs: [
+        ":framework_native_aidl",
         ":libgui_bufferqueue_sources",
 
         "BitTube.cpp",
@@ -106,6 +107,10 @@
         "libdvr_headers",
         "libpdx_headers",
     ],
+
+    aidl: {
+        export_aidl_headers: true,
+    }
 }
 
 // Used by media codec services exclusively as a static lib for
diff --git a/libs/gui/LayerMetadata.cpp b/libs/gui/LayerMetadata.cpp
index 04d2871..b3eb994 100644
--- a/libs/gui/LayerMetadata.cpp
+++ b/libs/gui/LayerMetadata.cpp
@@ -18,6 +18,8 @@
 #include <binder/Parcel.h>
 #include <gui/LayerMetadata.h>
 
+#include "android/view/LayerMetadataKey.h"
+
 using android::base::StringPrintf;
 
 namespace android {
@@ -113,12 +115,12 @@
 
 std::string LayerMetadata::itemToString(uint32_t key, const char* separator) const {
     if (!has(key)) return std::string();
-    switch (key) {
-        case METADATA_OWNER_UID:
+    switch (static_cast<view::LayerMetadataKey>(key)) {
+        case view::LayerMetadataKey::METADATA_OWNER_UID:
             return StringPrintf("ownerUID%s%d", separator, getInt32(key, 0));
-        case METADATA_WINDOW_TYPE:
+        case view::LayerMetadataKey::METADATA_WINDOW_TYPE:
             return StringPrintf("windowType%s%d", separator, getInt32(key, 0));
-        case METADATA_TASK_ID:
+        case view::LayerMetadataKey::METADATA_TASK_ID:
             return StringPrintf("taskId%s%d", separator, getInt32(key, 0));
         default:
             return StringPrintf("%d%s%dbytes", key, separator,