Android请求java端通用类

android请求java端通用类

httpclient的使用步骤

3.1 创建httpclient对象

httpclient httpclient = new defaulthttpclient();

3.2 创建httpget(或httppost)对象

httpget httpget = new httpget("https://www.baidu.com");

httppost httppost = new httppost("https://www.baidu.com");

3.3 添加参数(可选)

setparams(httpparams params)//httpget和httppost共有

setentity(httpentity entity)//httppost独有

list params = new arraylist();

params.add(new basicnamevaluepair("age", "20"));

params.add(new basicnamevaluepair("like", "aa"));

params.add(new basicnamevaluepair("like", "bb"));

params.add(new basicnamevaluepair("like", "cc"));

params.add(new basicnamevaluepair("newscategoryid", "1"));

httpentity paramentity = new urlencodedformentity(params,"utf-8");

httppost.setentity(paramentity);

3.4 发送get(或post)请求，并获得响应

httpresponse httpresponse = httpclient.execute(httpurirequest request);

注1：httpurirequest为httpget和httppost的父类

注2：需要添加允许网络访问权限，不然会报错“java.lang.securityexception: permission denied (missing internet permission)”

注3：如果地址错误，或服务器未开户，httpclient这sb会等待n久(>24小时)。

所以请记得设置超时时间，所以请记得设置超时时间，所以请记得设置超时时间

所以请记得设置超时时间，所以请记得设置超时时间，所以请记得设置超时时间

所以请记得设置超时时间，所以请记得设置超时时间，所以请记得设置超时时间

另外httpclient版本不一样，代码也不一样。下面的4.0版本的写法

httpclient.getparams().setparameter(coreconnectionpnames.connection_timeout, 2000);// 连接时间

httpclient.getparams().setparameter(coreconnectionpnames.so_timeout, 2000);// 数据传输时间

3.5 处理响应

3.5.1 响应状态码(200)

httpresponse.getstatusline().getstatuscode()

3.5.2 响应头

getallheaders()/getheaders(string name)

3.5.3 响应内容

httpentity httpentity = httpresponse.getentity();//此对象包含服务器的响应内容

string result = entityutils.tostring(httpentity);

bug

//导入httpclient

uselibrary 'org.apache.http.legacy'

//导入jackson

packagingoptions {

exclude 'meta-inf/dependencies'

exclude 'meta-inf/license'

exclude 'meta-inf/license.txt'

exclude 'meta-inf/license.txt'

exclude 'meta-inf/notice'

exclude 'meta-inf/notice.txt'

exclude 'meta-inf/notice.txt'

exclude 'meta-inf/asl2.0'

}