Android Http 网络操作相关类

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在android Http协议一般作为客户端和服务器端的常用网络数据操作，那Http相关联的类有哪些呢？

首先创建一个HttpClient 需要用到一下几个类：

HttpParams

HttpClientParams
ConnManagerParams

HttpConnectionParams

HttpProtocolParams

SchemeRegistry

示例代码如下：

public class CustomerHttpClient{    private static final String CHARSET = HTTP.UTF_8;    private static HttpClient customerHttpClient;    private CustomerHttpClient()    {    }    public static synchronized HttpClient getHttpClient()    {        if (null == customerHttpClient)        {            HttpParams params = new BasicHttpParams();            /* 设置一些基本参数 */            HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);            HttpProtocolParams.setContentCharset(params, CHARSET);            HttpProtocolParams.setUseExpectContinue(params, true);            HttpProtocolParams                    .setUserAgent(                            params,                            "Mozilla/5.0(Linux;U;Android 2.2.1;en-us;Nexus One Build.FRG83) "                                    + "AppleWebKit/553.1(KHTML,like Gecko) Version/4.0 Mobile Safari/533.1");            /* 超时设置 */            /* 从连接池中取连接的超时时间 */            ConnManagerParams.setTimeout(params, 1000);            /* 连接超时 */            HttpConnectionParams.setConnectionTimeout(params, 2000);            /* 请求超时 */            HttpConnectionParams.setSoTimeout(params, 4000);            /* 设置我们的HttpClient支持HTTP和HTTPS两种模式 */            SchemeRegistry schReg = new SchemeRegistry();            schReg.register(new Scheme("http", PlainSocketFactory                    .getSocketFactory(), 80));            schReg.register(new Scheme("https", SSLSocketFactory                    .getSocketFactory(), 443));            /* 使用线程安全的连接管理来创建HttpClient */            ClientConnectionManager conMgr = new ThreadSafeClientConnManager(                    params, schReg);            customerHttpClient = new DefaultHttpClient(conMgr, params);        }        return customerHttpClient;    }}

示例2：

void doHttpGet(String userAgent, Context context, String uri)    {        AndroidHttpClient client = null;        client = AndroidHttpClient.newInstance(userAgent, context);        HttpParams params = client.getParams();        HttpConnectionParams.setConnectionTimeout(params, 30000);        HttpConnectionParams.setSoTimeout(params, 60000);        HttpClientParams.setRedirecting(params, true);        HttpClientParams.setAuthenticating(params, false);        HttpResponse response;        HttpGet request = new HttpGet(uri);        try        {            response = client.execute(request);        } catch (IllegalArgumentException ex)        {        } catch (IOException ex)        {        }    }

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