Android开发中的几种网络请求方式详解

android应用经常会和服务器端交互，这就需要手机客户端发送网络请求，下面介绍四种常用网络请求方式，我这边是通过android单元测试来完成这四种方法的，还不清楚android的单元测试的同学们请看android开发技巧总结中的android单元测试的步骤一文。

java.net包中的httpurlconnection类

get方式：

// get方式请求 
public static void requestbyget() throws exception { 
 string path = "//www.jb51.net/logins.jsp?id=helloworld&pwd=android"; 
 // 新建一个url对象 
 url url = new url(path); 
 // 打开一个httpurlconnection连接 
 httpurlconnection urlconn = (httpurlconnection) url.openconnection(); 
 // 设置连接超时时间 
 urlconn.setconnecttimeout(5 * 1000); 
 // 开始连接 
 urlconn.connect(); 
 // 判断请求是否成功 
 if (urlconn.getresponsecode() == http_200) { 
  // 获取返回的数据 
  byte[] data = readstream(urlconn.getinputstream()); 
  log.i(tag_get, "get方式请求成功，返回数据如下："); 
  log.i(tag_get, new string(data, "utf-8")); 
 } else { 
  log.i(tag_get, "get方式请求失败"); 
 } 
 // 关闭连接 
 urlconn.disconnect(); 
} 

post方式：

// post方式请求 
public static void requestbypost() throws throwable { 
 string path = "//www.jb51.net/logins.jsp"; 
 // 请求的参数转换为byte数组 
 string params = "id=" + urlencoder.encode("helloworld", "utf-8") 
   + "&pwd=" + urlencoder.encode("android", "utf-8"); 
 byte[] postdata = params.getbytes(); 
 // 新建一个url对象 
 url url = new url(path); 
 // 打开一个httpurlconnection连接 
 httpurlconnection urlconn = (httpurlconnection) url.openconnection(); 
 // 设置连接超时时间 
 urlconn.setconnecttimeout(5 * 1000); 
 // post请求必须设置允许输出 
 urlconn.setdooutput(true); 
 // post请求不能使用缓存 
 urlconn.setusecaches(false); 
 // 设置为post请求 
 urlconn.setrequestmethod("post"); 
 urlconn.setinstancefollowredirects(true); 
 // 配置请求content-type 
 urlconn.setrequestproperty("content-type", 
   "application/x-www-form-urlencode"); 
 // 开始连接 
 urlconn.connect(); 
 // 发送请求参数 
 dataoutputstream dos = new dataoutputstream(urlconn.getoutputstream()); 
 dos.write(postdata); 
 dos.flush(); 
 dos.close(); 
 // 判断请求是否成功 
 if (urlconn.getresponsecode() == http_200) { 
  // 获取返回的数据 
  byte[] data = readstream(urlconn.getinputstream()); 
  log.i(tag_post, "post请求方式成功，返回数据如下："); 
  log.i(tag_post, new string(data, "utf-8")); 
 } else { 
  log.i(tag_post, "post方式请求失败"); 
 } 
} 
 

org.apache.http包中的httpget和httppost类

get方式：

// httpget方式请求 
public static void requestbyhttpget() throws exception { 
 string path = "//www.jb51.net/logins.jsp?id=helloworld&pwd=android"; 
 // 新建httpget对象 
 httpget httpget = new httpget(path); 
 // 获取httpclient对象 
 httpclient httpclient = new defaulthttpclient(); 
 // 获取httpresponse实例 
 httpresponse httpresp = httpclient.execute(httpget); 
 // 判断是够请求成功 
 if (httpresp.getstatusline().getstatuscode() == http_200) { 
  // 获取返回的数据 
  string result = entityutils.tostring(httpresp.getentity(), "utf-8"); 
  log.i(tag_httpget, "httpget方式请求成功，返回数据如下："); 
  log.i(tag_httpget, result); 
 } else { 
  log.i(tag_httpget, "httpget方式请求失败"); 
 } 
} 

post方式：

// httppost方式请求 
public static void requestbyhttppost() throws exception { 
 string path = "//www.jb51.net/"; 
 // 新建httppost对象 
 httppost httppost = new httppost(path); 
 // post参数 
 list<namevaluepair> params = new arraylist<namevaluepair>(); 
 params.add(new basicnamevaluepair("id", "helloworld")); 
 params.add(new basicnamevaluepair("pwd", "android")); 
 // 设置字符集 
 httpentity entity = new urlencodedformentity(params, http.utf_8); 
 // 设置参数实体 
 httppost.setentity(entity); 
 // 获取httpclient对象 
 httpclient httpclient = new defaulthttpclient(); 
 // 获取httpresponse实例 
 httpresponse httpresp = httpclient.execute(httppost); 
 // 判断是够请求成功 
 if (httpresp.getstatusline().getstatuscode() == http_200) { 
  // 获取返回的数据 
  string result = entityutils.tostring(httpresp.getentity(), "utf-8"); 
  log.i(tag_httpget, "httppost方式请求成功，返回数据如下："); 
  log.i(tag_httpget, result); 
 } else { 
  log.i(tag_httpget, "httppost方式请求失败"); 
 } 
} 

以上是一些部分代码，测试的时候在测试类中运行对应的测试方法即可。完整代码点这里下载:

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