Android联网主要使用HttpURLConneciton和HttpClient进行联网,在手机联网的时候,我们优先选择wifi网络,其次在选择移动网络,这里所述移动网络主要指cmwap。
大家都知道cmwap连接需要设置代理地址和端口,那么,android程序中如何设置代理呢?这是个问题。
HttpURLConnection设置代理
1 //当我们使用的是中国移动的手机网络时,下面方法可以直接获取得到10.0.0.172,80端口
2 String host=android.net.Proxy.getDefaultHost();//通过andorid.net.Proxy可以获取默认的代理地址
3 int port =android.net.Proxy.getDefaultPort();//通过andorid.net.Proxy可以获取默认的代理端口
4 SocketAddress sa=new InetSocketAddress(host,port);
5 //定义代理,此处的Proxy是源自java.net
6 Proxy proxy=new Proxy(java.net.Proxy.Type.HTTP,sa);
7 URL getUrl = new URL(“www.baidu.com”);
8 HttpURLConnection con = (HttpURLConnection) getUrl.openConnection(proxy);//设置代理
HttpClient设置代理
1 DefaultHttpClient httpClient=new DefaultHttpClient();
2 String host=Proxy.getDefaultHost();//此处Proxy源自android.net
3 int port = Proxy.getPort(context);//同上
4 HttpHost httpHost = new HttpHost(host, port);
5 //设置代理
6 httpClient.getParams().setParameter(ConnRouteParams.DEFAULT_PROXY,httpHost);
7 HttpGet httpGet=new HttpPost("<a href="http://www.baidu.com">www.baidu.com</a>");
8 HttpResponse response=httpClient.execute(httpGet);
第一种方式:通过HttpURLConnection来访问
public static InputStream getHttpURLConnectionInputStream(Context context,String requestUrl,Map<String, String> param) {
URL url;
HttpURLConnection conn = null;
InputStream input = null;
try {
url = new URL(requestUrl);
if(getAPNType(context)==NetWorkUtil.CMWAP) //当请求的网络为wap的时候,就需要添加中国移动代理
{
Proxy proxy = new Proxy(java.net.Proxy.Type.HTTP,new InetSocketAddress("10.0.0.172", 80));
conn = (HttpURLConnection) url.openConnection(proxy);
}else{
conn = url.openConnection();
}
conn.setConnectTimeout(10000); //请求超时
conn.setRequestMethod("POST"); //请求方式
conn.setReadTimeout(1000); //读取超时
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
conn.setRequestProperty("Charset", "UTF-8");
conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
OutputStream os = conn.getOutputStream();
StringBuilder sb = new StringBuilder();
Iterator<String> it = param.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
String value = param.get(key);
sb.append(key).append("=").append(value).append("&");
}
String p = sb.toString().substring(0, sb.length()-1);
System.out.println("请求的参数"+p);
os.write(p.getBytes("utf-8"));
os.close();
if(conn!=null)
{
input = conn.getInputStream();
}
} catch (Exception e) {
e.printStackTrace();
}
return input;
}
上面这种方式就是HttpURLConnection ,这种方式在android开发中也是比较常用的,希望朋友们也要熟悉的掌握!
第二种方式:HttpClient
public static InputStream getHttpClientInputStream(Context context,String requestUrl, Map<String, String> param)throws Exception {
HttpClient client = new DefaultHttpClient();
if(getAPNType(context)==NetWorkUtil.CMWAP) //当请求的网络为wap的时候,就需要添加中国移动代理
{
HttpHost proxy = new HttpHost("10.0.0.172", 80);
client.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,
proxy);
}
HttpPost hp = new HttpPost(requestUrl);
hp.setHeader("Charset", "UTF-8");
hp.setHeader("Content-Type", "application/x-www-form-urlencoded");
List<BasicNameValuePair> list = new ArrayList<BasicNameValuePair>();
Iterator<String> it = param.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
list.add(new BasicNameValuePair(key, param.get(key)));
}
hp.setEntity(new UrlEncodedFormEntity(list,"UTF-8"));
HttpResponse response = null;
response = client.execute(hp);
return response.getEntity().getContent();
}
这个httpClient实现了android内置的DefaultHttpClient,所以使用起来还是很方便的!
但是我发现HttpClient 比HttpURLConnection 要好一些,因为HttpURLConnection 如果使用wap在上网请求的时候,存在很多问题的(我是深有体会的,比如请求无响应,信号不好都可能造成一些未知的错误).