diff --git a/js/ui/cordova/plugins/cordova-plugin-file/src/android/build-extras.gradle b/js/ui/cordova/plugins/cordova-plugin-file/src/android/build-extras.gradle
new file mode 100644
index 0000000..a0a7844
--- /dev/null
+++ b/js/ui/cordova/plugins/cordova-plugin-file/src/android/build-extras.gradle
@@ -0,0 +1,47 @@
+/*
+       Licensed to the Apache Software Foundation (ASF) under one
+       or more contributor license agreements.  See the NOTICE file
+       distributed with this work for additional information
+       regarding copyright ownership.  The ASF licenses this file
+       to you 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.
+ */
+ext.postBuildExtras = {
+    def inAssetsDir = file("assets")
+    def outAssetsDir = inAssetsDir
+    def outFile = new File(outAssetsDir, "cdvasset.manifest")
+
+    def newTask = task("cdvCreateAssetManifest") << {
+        def contents = new HashMap()
+        def sizes = new HashMap()
+        contents[""] = inAssetsDir.list()
+        def tree = fileTree(dir: inAssetsDir)
+        tree.visit { fileDetails ->
+            if (fileDetails.isDirectory()) {
+                contents[fileDetails.relativePath.toString()] = fileDetails.file.list()
+            } else {
+                sizes[fileDetails.relativePath.toString()] = fileDetails.file.length()
+            }
+        }
+
+        outAssetsDir.mkdirs()
+        outFile.withObjectOutputStream { oos ->
+            oos.writeObject(contents)
+            oos.writeObject(sizes)
+        }
+    }
+    newTask.inputs.dir inAssetsDir
+    newTask.outputs.file outFile
+    def preBuildTask = tasks["preBuild"]
+    preBuildTask.dependsOn(newTask)
+}