Android 网络通信机制

Posted 2022-06-21 冰糖葫芦三剑客

    

       简单地说有下面三种：

第一种： java.net.* (标准java接口)

  try
    URL url = new URL("http://www.google.com%22)//定义地址
    HttpURLConnection http = (HttpURLConnection) url.openConnection();//打开连接
    int nRC = http.getResponseCode();//得到连接状态
    if(nRC == HttpURLConnection.HTTP_OK)
     InputStream is = http.getInputStream();//取得数据
     .....//处理数据
    
   catch(Exception e)
    //因是连接网络，不免会出现一些异常，所以必须处理这些异常
   

第二种 Apache接口

 try
    HttpClient hc = new DefaultHttpClient();//创建HttpClient,这里使用DefaultHttpClient表示默认属性
    HttpGet hg = new HttpGet("http://www.google.com%22);//HttpGet实例
    HttpResponse rp = hc.execute(hg);//连接
    if(rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK)
     InputStream is = rp.getEntity().getContent();
     .....//处理数据
    
   catch(IOEeception e)
   

第三中 android网络接口

  try
    InetAddress ia = InetAddress.getByName("192.168.1.110");//IP地址
    Socket sk = new Socket(inetAddress,61203,true);//端口
    InputStream is =sk.getInputStream();//得到数据
    OutputStream os = sk.getOutputStream();
    .....//数据处理
    os.close();
    is.close();
    sk.close();
   catch(UnknownHostException e)
   catch(IOException e)