plugin.xml

<?xml version='1.0' encoding='utf-8'?>
<plugin id="plugin.google.maps.experimental" version="0.1" xmlns="http://apache.org/cordova/ns/plugins/1.0" xmlns:android="http://schemas.android.com/apk/res/android">
    <name>phonegap-googlemaps-plugin-marker_cluster</name>
    <js-module name="markercluster" src="www/marker-cluster.js">
        <clobbers target="plugin.experimental" />
    </js-module>

    <license>Apache 2.0</license>
    
    
    <!-- android -->
    <platform name="android">

        <config-file target="res/xml/config.xml" parent="/*">
            <feature name="MarkerCluster">
                <param name="android-package" value="plugin.google.maps.experimental.MarkerCluster" />
            </feature>
        </config-file>
    
        <!-- plugin src files -->
        <source-file src="src/android/plugin/google/maps/PluginMarkerCluster.java" target-dir="src/plugin/google/maps" />
        <source-file src="src/android/plugin/google/maps/experimental/MarkerCluster.java" target-dir="src/plugin/google/maps/experimental" />
        <source-file src="src/android/plugin/google/maps/experimental/Cluster.java" target-dir="src/plugin/google/maps/experimental" />
        <source-file src="src/android/plugin/google/maps/experimental/AsyncCluster.java" target-dir="src/plugin/google/maps/experimental" />
        <source-file src="src/android/plugin/google/maps/experimental/MarkerClusterUtil.java" target-dir="src/plugin/google/maps/experimental" />
        <source-file src="src/android/plugin/google/maps/experimental/MarkerJsonData.java" target-dir="src/plugin/google/maps/experimental" />
    </platform>
    
</plugin>