Get Certificate pinning sha with Square OKHTTP 3

gistfile1.txt

        // Make sure this does not run on the main thread.
        String hostname = "yourdomain.com";
        CertificatePinner certificatePinner = new CertificatePinner.Builder()
                .add(hostname, "sha256/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=")
                .build();
        OkHttpClient client = new OkHttpClient.Builder()
                .certificatePinner(certificatePinner)
                .build();

        Request request = new Request.Builder()
                .url("https://" + hostname)
                .build();
        try {
            client.newCall(request).execute();
        } catch (IOException e) {
            e.printStackTrace();
            // Inspect the error details for the correct sha
        }