android http post 전송

build.gradle

compile 'com.squareup.okhttp3:okhttp:3.2.0'

private void sendRegistrationToServer(String token) {

    OkHttpClient client = new OkHttpClient();
    RequestBody body = new FormBody.Builder()
            .add("Token", token)
            .build();

    //request
    Request request = new Request.Builder()
            .url("http://서버주소/")
            .post(body)
            .build();

    try {
        client.newCall(request).execute();
    } catch (IOException e) {
        e.printStackTrace();
    }
}