如何在Java中为Android设置HttpResponse超时

Question

我创建了以下函数来检查连接状态：

private void checkConnectionStatus() {
    HttpClient httpClient = new DefaultHttpClient();

    try {
      String url = "http://xxx.xxx.xxx.xxx:8000/GaitLink/"
                   + strSessionString + "/ConnectionStatus";
      Log.d("phobos", "performing get " + url);
      HttpGet method = new HttpGet(new URI(url));
      HttpResponse response = httpClient.execute(method);

      if (response != null) {
        String result = getResponse(response.getEntity());
        ...

当我关闭服务器以测试执行情况时，会在网上等待很长时间

HttpResponse response = httpClient.execute(method);

有谁知道如何设置超时以避免等待太久？

Answer 1

在我的示例中，设置了两个超时。连接超时抛出java.net.SocketTimeoutException: Socket is not connected，套接字超时java.net.SocketTimeoutException: The operation timed out。

HttpGet httpGet = new HttpGet(url);
HttpParams httpParameters = new BasicHttpParams();
// Set the timeout in milliseconds until a connection is established.
// The default value is zero, that means the timeout is not used. 
int timeoutConnection = 3000;
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
// Set the default socket timeout (SO_TIMEOUT) 
// in milliseconds which is the timeout for waiting for data.
int timeoutSocket = 5000;
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
HttpResponse response = httpClient.execute(httpGet);

如果要设置任何现有HTTPClient的参数（例如DefaultHttpClient或AndroidHttpClient），则可以使用函数setParams（）。

httpClient.setParams(httpParameters);