public void postData(View view) {
        // Create a new HttpClient and Post Header
        HttpClient client = new DefaultHttpClient();
        HttpPost post = new HttpPost("www.google.com");

        List<NameValuePair> pairs = new ArrayList<NameValuePair>();
        pairs.add(new BasicNameValuePair("key1", "value1"));
        pairs.add(new BasicNameValuePair("key2", "value2"));
        try {
            post.setEntity(new UrlEncodedFormEntity(pairs));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        TextView Txt2 = (TextView)findViewById(R.id.textView4);
        Txt2.setText("Проверка вывода текста");
    }

http://www.mysite.ru/index.php?var1=125&var2='Вася'