Android网络开发之HttpClient

Apache提供HttpClient，它对java.net中的类做了封装和抽象，更适合在Android上开发应用。

HttpClient应用开发几个类：

1. ClientConnectionManager是客户端连接管理器的接口，

提供以下几个抽象方法：

closeIdleConnections, 关闭空闲的连接

releaseConnection, 释放一个连接

requestConnection, 请求一个新的连接

shutdown 关闭ClientConnectionManager并释放资源

2. DefaultHttpClient是一个默认的Http客户端，可以用来创建一个http连接。

HttpClient httpClient = new DefaultHttpClient();

3. HttpResponse是一个http连接响应

HttpResponse response = httpClient.execute(httpRequest);

if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK)

 

//  示例代码：HttpGet –> HttpClient –> HttpResponse

String url = “http://www.txrj.com/reg.jsp?name=jake”;

HttpGet request = new HttpGet(url);

HttpClient client = new DefaultHttpClient();

HttpResponse response = client.execute(request);

if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

  String data = EntityUtils.toString(response.getEntity());

}

 

// 示例代码：HttpPost –> HttpClient –> HttpResponse

Post方式情况下，需要使用NameValuePair来保存要传递的参数，具体可以使用BasicNameValuePair，然后通过add方法添加到NameValuePair中。

String url = “http://www.txrj.com/reg.jsp”;

HttpPost request = new HttpPost(url);

// 添加参数

List<NameValuePair> params = new ArrayList<NameValuePair>();

params.add(new BasicNameValuePair(“name”,"jake”));

// 设置字符集

HttpEntity entity = new UrlEncodedFormEntity(params, “gb2312”);

request.setEntity(entity);

HttpClient client = new DefaultHttpClient();

HttpResponse response = client.execute(request);

if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

  String data = EntityUtils.toString(response.getEntity());

}