How to implement paypal payment getway in android phonegap?

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Android

PayPal

PhoneGap

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I am implementing paypal to my phonegap,but i am not able to run this paypal one.I have followed the following steps to implement.

1.I have implemented three js paypal-mobile-js-helper.js ,cdv-plugin-paypal-mobile-sdk.js and paypal.js in paypal.html after cordova.js

2.Used com.paypal.cordova.mobilesdk plugin in config.xml .I am not sure about it and how to use this plugin

3.In paypal.html i have used this in body section

<button id="buyNowBtn"> Buy Now !</button>
              <button id="buyInFutureBtn"> Pay in Future !</button>
              <button id="profileSharingBtn"> Profile Sharing !</button>

after click upon the button ,nothing is happening. Where i am doing wrong,please suggest me.Thank you