plugin.xml

<?xml version='1.0' encoding='utf-8'?>
<plugin xmlns:android="http://schemas.android.com/apk/res/android" id="cordova-plugin-my-first-plugin" version="0.0.1"
        xmlns="http://apache.org/cordova/ns/plugins/1.0">
    <name>myFirstPlugin</name>
    <js-module name="myFirstPlugin" src="www/myFirstPlugin.js">
        <clobbers target="cordova.plugins.myFirstPlugin"/>
    </js-module>
    <platform name="ios">
        <config-file parent="/*" target="config.xml">
            <feature name="myFirstPlugin">
                <param name="ios-package" value="myFirstPlugin"/>
            </feature>
        </config-file>
        <source-file src="src/ios/myFirstPlugin.m"/>
    </platform>
    <platform name="android">
        <config-file parent="/*" target="res/xml/config.xml">
            <feature name="myFirstPlugin">
                <param name="android-package" value="cordova-plugin-my-first-plugin.myFirstPlugin"/>
            </feature>
        </config-file>
        <config-file parent="/*" target="AndroidManifest.xml"></config-file>
        <source-file src="src/android/myFirstPlugin.java"
                     target-dir="src/cordova-plugin-my-first-plugin/myFirstPlugin"/>
    </platform>
</plugin>