HttpClientProvider Source from Pro Android 4

HttpClientProvider.java

import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.params.ConnManagerParams;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.protocol.HTTP;

/**
 * Source from Pro Android 4
 * 
 * @author e.shishkin
 *
 */
public class HttpClientProvider {

	private static HttpClient mHttpClient;

	/** A private Constructor prevents instantiation */
	private HttpClientProvider() {}

	/**
	 * Getter method returns the one and only HttpClient object for the singleton, 
	 * creating it the first time as necessary.
	 * @return HttpClient
	 */
	public static synchronized HttpClient getHttpClient() {
		if (mHttpClient == null) {
			HttpParams params = new BasicHttpParams();
			HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
			HttpProtocolParams.setContentCharset(params, HTTP.DEFAULT_CONTENT_CHARSET);
			HttpProtocolParams.setUseExpectContinue(params, true);
			HttpProtocolParams.setUserAgent(params,
					"Mozilla/5.0 (Linux; U; Android 2.2.1; en-us; generic) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1");
			
			ConnManagerParams.setTimeout(params, 1000);
			// Set the timeout in milliseconds until a connection is established.
			HttpConnectionParams.setConnectionTimeout(params, 5000);
			// Set the default socket timeout (SO_TIMEOUT) in milliseconds which is the timeout for waiting for data.
			HttpConnectionParams.setSoTimeout(params, 20000);
			
			SchemeRegistry schReg = new SchemeRegistry();
			schReg.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
			schReg.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));
			ClientConnectionManager conMgr = new ThreadSafeClientConnManager(params, schReg);
			mHttpClient = new DefaultHttpClient(conMgr, params);
		}
		return mHttpClient;
	}

	public Object clone() throws CloneNotSupportedException {
		throw new CloneNotSupportedException();
	}

}