• Android开发之Http通信HttpClient接口


    转自:http://blog.csdn.net/redoffice/article/details/7555632

    HttpClient接口

           Apache提供了HttpClient接口,其对java.net中的类做了封装和抽象。更适合我们在Android上开发联网应用。要使用HttpClient还需要了解一些类:

    1.       ClientConnectionManager接口

    此接口是客户端连接浏览器的接口,提供如下的抽象方法:

     

    Public Methods

    abstract void

    closeExpiredConnections() //关闭所有无效超时的连接

    Closes all expired connections in the pool.

    abstract void

    closeIdleConnections(long idletime, TimeUnit tunit) //关闭空闲的连接

    Closes idle connections in the pool.

    abstract SchemeRegistry

    getSchemeRegistry() //得到一个SchemeRegistry

    Obtains the scheme registry used by this manager.

    abstract void

    releaseConnection(ManagedClientConnection conn, long validDuration, TimeUnit timeUnit)

    Releases a connection for use by others.//释放一个连接

    abstract ClientConnectionRequest

    requestConnection(HttpRoute route, Object state)// 请求一个新的连接

    Returns a new ClientConnectionRequest, from which a ManagedClientConnection can be obtained or the request can be aborted.

    abstract void

    shutdown() //关闭管理器并释放资源

    Shuts down this connection manager and releases allocated resources.

     

     

    2.       DefaultHttpClient

    DefaultHttpClient是默认的一个Http客户端,可以使用它创建一个Http连接。

    This class replaces HttpClient in HttpClient 3

    创建一个DefaultHttpColient的代码如下:

    HttpClient httpclient = new DefaultHttpClient();

     

    3.       HttpResponse

    HttpResponse是一个Http连接响应,当执行一个Http连接后,就会返回一个HttpResponse,可以通过HttpResponse获得一些响应信息。例如,请求一个HTTP连接并获得该请求是否成功的代码:

    HttpClient httpclient = new DefaultHttpClient();

    HttpResponse httpResponse = httpclient.execute(httpRequest);

    if(httpResponse.getStatusLine().getStatusCode()==HttpStatus.sc_OK){

            //连接成功

    }

     

    后继将附上GET以及POST方式的代码。代码基本上跟HttpURLConnection的代码类似。



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  • 原文地址:https://www.cnblogs.com/walccott/p/4957578.html
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