网络请求HttpURLConnection

HttpURLConnection应用

manifests 注册添加权限

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

- [x] 1.从网络上获取数据         String path ="http://169.254.135.196:8080/aa.json";   
- [x] 2.创建url对象   URL url = new URL(path);  
- [x] 3.打开一个连接    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();   
- [x] 4.设置它的请求方式    urlConnection.setRequestMethod("GET");  
- [x] 5.设置它的请求超时时间    urlConnection.setConnectTimeout(5000);  
- [x] 6.获得响应码    int code = urlConnection.getResponseCode();   
- [x] 7.if（code==200）{urlConnection.getintputstrem}获取数据流