// should be a singleton
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("http://publicobject.com/helloworld.txt")
.build();
HttpUrl.Builder urlBuilder = HttpUrl.parse("https://ajax.googleapis.com/ajax/services/search/images").newBuilder();
urlBuilder.addQueryParameter("v", "1.0");
urlBuilder.addQueryParameter("q", "android");
urlBuilder.addQueryParameter("rsz", "8");
String url = urlBuilder.build().toString();
Request request = new Request.Builder()
.url(url)
.build();
Request request = new Request.Builder()
.header("Authorization", "token abcd")
.url("https://api.github.com/users/codepath")
.build();