Http PATCH example using HttpUrlConnection?

Question

Does anyone have a working PATCH request example using HttpUrlConnection on android? I'm trying something like:

HttpURLConnection conn = (HttpURLConnection) (new URL(myUrl).openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("PATCH");
conn.setRequestProperty("Content-Type", "application/json");
conn.setRequestProperty("Accept", "application/json");

OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(" {\"name\": \"john\" }");
wr.flush();

Thanks