diff --git a/api/Android.bp b/api/Android.bp
index 2bc74ad..5704131 100644
--- a/api/Android.bp
+++ b/api/Android.bp
@@ -46,4 +46,9 @@
         "//apex_available:platform",
         "com.android.devicelock",
     ],
+    target: {
+        windows: {
+            enabled: true,
+        },
+    },
 }
diff --git a/contrib/grpc_metrics/Android.bp b/contrib/grpc_metrics/Android.bp
index 7184c1f..4dc3749 100644
--- a/contrib/grpc_metrics/Android.bp
+++ b/contrib/grpc_metrics/Android.bp
@@ -41,4 +41,9 @@
         "//apex_available:platform",
         "com.android.devicelock",
     ],
+    target: {
+        windows: {
+            enabled: true,
+        },
+    },
 }
diff --git a/contrib/http_util/Android.bp b/contrib/http_util/Android.bp
new file mode 100644
index 0000000..a753984
--- /dev/null
+++ b/contrib/http_util/Android.bp
@@ -0,0 +1,41 @@
+// Copyright (C) 2020 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 {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "external_opencensus-java_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["external_opencensus-java_license"],
+}
+
+java_library {
+    name: "opencensus-java-contrib-http-util",
+    host_supported: true,
+    srcs: [
+        "src/main/java/**/*.java",
+    ],
+    libs: [
+        "opencensus-java-api",
+        "guava",
+    ],
+    target: {
+        windows: {
+            enabled: true,
+        },
+    },
+}