android eclipse setup http POST and GET against web server

I need help to setup an application in android using eclipse.

I have not used eclipse for JAVA development before so I am a little green as to how this all comes together with android in the mix.

I have a script that I downloaded to test with my web server that has been setup to produce output when accessed (JSON named value pairs at this time).

I am using -

Eclipse IDE for Java Developers

Version: Helios Service Release 2

Build id: 20110218-0911

Android Development Toolkit

Version: 10.0.1.v201103111512-110841

The JAVA code so far -

package new.android.test;

import android.app.Activity;
import android.os.Bundle;
import java.io.ByteArrayInputStream;
import java.net.Socket;

import org.apache.http.ConnectionReuseStrategy;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.InputStreamEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.DefaultConnectionReuseStrategy;
import org.apache.http.impl.DefaultHttpClientConnection;
import org.apache.http.message.BasicHttpEntityEnclosingRequest;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.params.SyncBasicHttpParams;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpProcessor;
import org.apache.http.protocol.HttpRequestExecutor;
import org.apache.http.protocol.ImmutableHttpProcessor;
import org.apache.http.protocol.RequestConnControl;
import org.apache.http.protocol.RequestContent;
import org.apache.http.protocol.RequestExpectContinue;
import org.apache.http.protocol.RequestTargetHost;
import org.apache.http.protocol.RequestUserAgent;
import org.apache.http.util.EntityUtils;

/**
 * Elem开发者_JS百科ental example for executing a POST request.
 * <p>
 * Please note the purpose of this application is demonstrate the usage of HttpCore APIs.
 * It is NOT intended to demonstrate the most efficient way of building an HTTP client. 
 *
 *
 *
 */

public class search extends Activity {

    public static void main(String[] args) throws Exception {

        HttpParams params = new SyncBasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setContentCharset(params, "UTF-8");
        HttpProtocolParams.setUserAgent(params, "HttpComponents/1.1");
        HttpProtocolParams.setUseExpectContinue(params, true);

        HttpProcessor httpproc = new ImmutableHttpProcessor(new HttpRequestInterceptor[] {
                // Required protocol interceptors
                new RequestContent(),
                new RequestTargetHost(),
                // Recommended protocol interceptors
                new RequestConnControl(),
                new RequestUserAgent(),
                new RequestExpectContinue()});

        HttpRequestExecutor httpexecutor = new HttpRequestExecutor();

        HttpContext context = new BasicHttpContext(null);

        HttpHost host = new HttpHost("localhost", 80);

        DefaultHttpClientConnection conn = new DefaultHttpClientConnection();
        ConnectionReuseStrategy connStrategy = new DefaultConnectionReuseStrategy();

        context.setAttribute(ExecutionContext.HTTP_CONNECTION, conn);
        context.setAttribute(ExecutionContext.HTTP_TARGET_HOST, host);

        try {

            HttpEntity[] requestBodies = {
                    new StringEntity(
                            "This is the first test request", "UTF-8"),
                    new ByteArrayEntity(
                            "This is the second test request".getBytes("UTF-8")),
                    new InputStreamEntity(
                            new ByteArrayInputStream(
                                    "This is the third test request (will be chunked)"
                                    .getBytes("UTF-8")), -1)
            };

            for (int i = 0; i < requestBodies.length; i++) {
                if (!conn.isOpen()) {
                    Socket socket = new Socket(host.getHostName(), host.getPort());
                    conn.bind(socket, params);
                }
                BasicHttpEntityEnclosingRequest request = new BasicHttpEntityEnclosingRequest("POST", 
                        "/android.php");
                request.setEntity(requestBodies[i]);
                System.out.println(">> Request URI: " + request.getRequestLine().getUri());

                request.setParams(params);
                httpexecutor.preProcess(request, httpproc, context);
                HttpResponse response = httpexecutor.execute(request, conn, context);
                response.setParams(params);
                httpexecutor.postProcess(response, httpproc, context);

                System.out.println("<< Response: " + response.getStatusLine());
                System.out.println(EntityUtils.toString(response.getEntity()));
                System.out.println("==============");
                if (!connStrategy.keepAlive(response, context)) {
                    conn.close();
                } else {
                    System.out.println("Connection kept alive...");
                }
            }
        } finally {
            conn.close();
        }        
    }

}

Ok main question is why so many imports?

Also I am getting errors for these imports:

The import org.apache.http.params.SyncBasicHttpParams cannot be resolved  
The import org.apache.http.protocol.ImmutableHttpProcessor cannot be resolved  

I cannot see these classes in the android.jar.

Is there a more simple example of implementing a transaction against a web server to obtain a namevaluepair (JSON) for using in the android java application?

Those errors are because the classes you are referencing are not a part of the standard Android distribution: see http://developer.android.com/reference/org/apache/http/params/package-summary.html and http://developer.android.com/reference/org/apache/http/protocol/package-summary.html.

Android repackages a specific version of the Apache HTTP library. If you want to use those classes you'll need to include those jars.