question about asynchronous http

I just want to check if I understood well the way asynchronous Http request work on Android. Suppose I make such a request and set a ResponseHan开发者_如何学运维dler<String> responseHandler to handle the response. By doing this is it possible to have the UI thread blocked waiting for the response ? The implication being that the code in the function:

public String handleResponse(HttpResponse response)

is also executed on the UI thread or is there silently spawned a thread that waits for the response and calls the handleResponse(HttpResponse response) function when the response arrives ?

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By doing this is it possible to have the UI thread blocked waiting for the response ?

Calling execute() with or without a ResponseHandler will block that thread until the HTTP request has been processed. If you call execute() on the main application thread, you will block the UI. This is not a good thing -- use AsyncTask to execute() on a separate thread, then use your onPostExecute() implementation to update your UI with the results of the request.