Public Key Pinning Run

MainActivity.java

private void sendRequest() {
    requestQueue = Volley.newRequestQueue(this, new HurlStack(null, pinnedSSLSocketFactory()));
    StringRequest request = new StringRequest(Request.Method.GET, SECURE_URL, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            Toast.makeText(MainActivity.this, "Response: " + response, Toast.LENGTH_SHORT).show();
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Toast.makeText(MainActivity.this, "Failed!", Toast.LENGTH_SHORT).show();
            Log.e(TAG, "Request failed: " + error.toString());
        }
    });
    requestQueue.add(request);
}

private SSLSocketFactory pinnedSSLSocketFactory() {
    try {
        return new TLSSocketFactory(PUBLIC_KEY);
    } catch (KeyManagementException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
    return null;
}