What is HttpURLConnection in android?

HttpURLConnection uses the GET method by default. It will use POST if setDoOutput(true) has been called. Other HTTP methods ( OPTIONS , HEAD , PUT , DELETE and TRACE ) can be used with setRequestMethod(String) .

Which method is used to close HTTP url connection?

disconnect()
The disconnect() is the method of HttpURLConnection class. This method is used to disconnect the server.

What is async task in Android?

An asynchronous task is defined by a computation that runs on a background thread and whose result is published on the UI thread. An asynchronous task is defined by 3 generic types, called Params , Progress and Result , and 4 steps, called onPreExecute , doInBackground , onProgressUpdate and onPostExecute .

What is setRequestMethod head?

setRequestMethod( “HEAD” ); When processing a HEAD request, the server returns a response without the body content. Only the header fields are returned. Hence the method name “HEAD”.

What are the 3 generic types of AsyncTask?

An asynchronous task is defined by 3 generic types, called Params , Progress and Result , and 4 steps, called onPreExecute , doInBackground , onProgressUpdate and onPostExecute .

What is Httphead?

The HTTP HEAD method requests the headers that would be returned if the HEAD request’s URL was instead requested with the HTTP GET method. For example, if a URL might produce a large download, a HEAD request could read its Content-Length header to check the filesize without actually downloading the file.

What is socket and ServerSocket in Java?

Here, two classes are being used: Socket and ServerSocket. The Socket class is used to communicate client and server. Through this class, we can read and write message. The ServerSocket class is used at server-side. The accept() method of ServerSocket class blocks the console until the client is connected.

What is HostnameVerifier in Java?

public interface HostnameVerifier. This class is the base interface for hostname verification. During handshaking, if the URL’s hostname and the server’s identification hostname mismatch, the verification mechanism can call back to implementers of this interface to determine if this connection should be allowed.