How to invoke a method in a session bean from an Android client?

I want to know whether it is possible to creat开发者_Go百科e an Android application to communicate with a session bean and invoke a method. if so can anybody explain how? or else can i invoke that method in the EJB with a JSP/servelet and call the JSP/Servelet with Android clients.. examples are highly appreciate

Thanks !!!

It is possible to communicate with Servelet in Android using HttpClient, HttpPost and HttpGet classes in android..

It is in theory relatively simple. Servlets can be configured by web.xml or @WebServlet annotation to get executed on a certain request URL. On a HTTP GET request the doGet() method will be executed. On a HTTP POST request, the doPost() method will be executed. The business logic which the servlet executes can depend/rely on the presence of HTTP request parameters and/or the request URI pathinfo.

All you need to do is to fire a HTTP request with the right URL and/or the right request parameters and/or the right pathinfo to let the servlet execute the desired job.

The basic Java API offers the java.net.URL and java.net.URLConnection for this. A simple HTTP GET request can be executed as follows:

InputStream response = new URL("http://example.com/servleturl?foo=bar&bar=foo").openStream();
// ...

Firing HTTP POST requests is a bit more complex. It can be done with java.net.URLConnection as outlined in this mini-tutorial, but Android also ships with Apache HttpComponents Client which allows firing and handling HTTP requests with less lines of code and more self-explaining code.

On http://androidsnippets.org you can find a lot of examples with HttpClient.