android中的数据连接：InputStream的“available”返回不同的值

Question

下面的代码在 Android 模拟器中有效，但在真实设备中无效。 inputstream.available() 在设备上返回 -1，而在模拟器上则返回一个 int 值（以千为单位）。有什么帮助吗？

代码：

try {
                URL url = new URL("http://www.google.com");
                Log.d(TAG,"Set URL");
                urlConnection = (HttpURLConnection) url.openConnection();
                //urlConnection.connect();
                Log.d(TAG,"Open connection");
                 InputStream in = new BufferedInputStream(urlConnection.getInputStream());
                Log.d(TAG,"get input");
                 str="Connect time out::"+urlConnection.getConnectTimeout()+
                     "\nContent length:"+urlConnection.getContentLength()+
                     "\nRead time out::"+ urlConnection.getReadTimeout()+
                     "\nResponse messgae::"+urlConnection.getResponseMessage()+
                     "\nAvailable bytes::::"+in.available();
                 Log.d(TAG,""+str);
                 read(in);

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                urlConnection.disconnect();
            }

Answer 1

一般来说，您应该使用 Android 提供的 HttpClient，Java URL 类不够健壮。

喜欢：

    HttpClient client = new DefaultHttpClient();
    HttpGet request = new HttpGet();
    request.setURI(new URI("http://w3mentor.com/"));
    HttpResponse response = client.execute(request);
    in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));