Maintaining session in android ( application stay authenticated on the server side)

Question

I am building a login application in android in which i am hitting a url(with username and password) upto that part it works fine but after that whenever I am hitting a url(

Answer 1

I wrote a post about it a while back on coderwall It uses the HttpRequestInterceptor and HttpResponseInterceptor classes which are perfect for that kind of scenario.

Here is an example:

public class HTTPClients {

private static DefaultHttpClient _defaultClient;
private static String session_id;
private static HTTPClients _me;
private HTTPClients() {

}
public static DefaultHttpClient getDefaultHttpClient(){
    if ( _defaultClient == null ) {
        _defaultClient = new DefaultHttpClient();
        _me = new HTTPClients();
        _defaultClient.addResponseInterceptor(_me.new SessionKeeper());
        _defaultClient.addRequestInterceptor(_me.new SessionAdder());
    }
    return _defaultClient;
}

private class SessionAdder implements HttpRequestInterceptor {

    @Override
    public void process(HttpRequest request, HttpContext context)
            throws HttpException, IOException {
        if ( session_id != null ) {
            request.setHeader("Cookie", session_id);
        }
    }

}

private class SessionKeeper implements HttpResponseInterceptor {

    @Override
    public void process(HttpResponse response, HttpContext context)
            throws HttpException, IOException {
        Header[] headers = response.getHeaders("Set-Cookie");
        if ( headers != null && headers.length == 1 ){
            session_id = headers[0].getValue();
        }
    }

}

}