サンプル

Example.java

try {
  　URL url = new URL("http://www.example.com/");
    URLConnection uc = url.openConnection();
    uc.setDoOutput(true);
    uc.setRequestProperty("Content-type", "application/json");
    OutputStream os = uc.getOutputStream();

    PrintStream ps = new PrintStream(os);
    ps.print("post message");
    ps.close();

    InputStream is = uc.getInputStream();
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));

    StringBuffer sb = new StringBuffer();
    String s;
    while ((s = reader.readLine()) != null) {
        sb.append(s);
    }
    if (resLis != null)
        resLis.onResponse(sb.toString());
    reader.close();

} catch (IOException e) {
    if (errLis != null)
        errLis.onError(0);
}