The following code disables SSL certificate checking for any new instances of HttpsUrlConnection wrapped to be used in NativeScript.

Ignore certificate for HttpURLConnection in Android.java

/**
* Disables the SSL certificate checking for new instances of {@link HttpsURLConnection} This has been created to
* aid testing on a local box, not for use on production.
*
* Save this file in App_Resources/Android/src/main/java/DevHack.java
* 
* Make sure you do a ns clean and rebuild your project
*
* You can call this method in Javascript with com.hack.DevHack.disableSSLCertificateChecking();
*/

package com.hack;

import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

public class DevHack
{
    public static void disableSSLCertificateChecking() {
        TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }

            @Override
            public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
                // Not implemented
            }

            @Override
            public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
                // Not implemented
            }
        } };

        try {
            SSLContext sc = SSLContext.getInstance("TLS");

            sc.init(null, trustAllCerts, new java.security.SecureRandom());

            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        } catch (KeyManagementException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }
}