如何处理HttpClient抛出的IOException？

Question

有时当我尝试从我的应用程序的后台服务调用api时，连接未建立，我可以从我的日志中看到IOException消息（网络错误）。

AndroidHttpClient client = null;
        try {
            // Create the end-point client
            client = AndroidHttpClient.newInstance("TCR Software Android Application");
            HttpConnectionParams.setConnectionTimeout(client.getParams(), 30000); // 10000
            HttpConnectionParams.setSoTimeout(client.getParams(), 30000); // 10000

            // Execute the request
            Log.v("RESTClient", "executing " + request.getMethod() + " " + request.getURI());
            HttpResponse response = client.execute(request);

            // Get response wrapper
            responseBody = EntityUtils.toString(response.getEntity());
            JSONObject responseWrapper = new JSONObject(responseBody);
            //JSONObject responseWrapper = new JSONObject(EntityUtils.toString(response.getEntity()));

            // Check result type
            if (!responseWrapper.has("ResultType")) throw new RESTClientException(responseWrapper.getString("Message"), Reason.SERVICE_ERROR);

            // Get the data object
            Object responseData = responseWrapper.isNull("Data") ? null : responseWrapper.get("Data");

            // Check for su
            if (responseWrapper.getInt("ResultType") != 1) throw new RESTClientException(responseData == null ? responseWrapper.getString("Message") : responseData.toString(), Reason.APPLICATION_ERROR);

            // Always return JSONArray
            if (responseData == null)
                return new JSONArray();
            if (responseData instanceof JSONObject)
                return new JSONArray().put(responseData);
            else if (responseData instanceof JSONArray)
                return (JSONArray)responseData;
            else if (responseData instanceof Boolean)
                return new JSONArray().put(responseData);
            else if (responseData instanceof Date)
                return new JSONArray().put(responseData);
            else if (responseData instanceof String)
                return new JSONArray().put(responseData);
            else if (responseData instanceof Integer)
                return new JSONArray().put(responseData);
            else
            {
                Log.e("RESTClient", "Unexpected data format returned by server\n" + responseBody);
                throw new RESTClientException("Unexpected data format returned by server. ", Reason.PROTOCOL_ERROR);
            }
        } finally {
            if (client != null) client.close();
        }
    } catch (JSONException e) {
        Log.e("RESTClient", "Unintelligible response from server\n" + responseBody, e);
        throw new RESTClientException("Unintelligible response from server", Reason.PROTOCOL_ERROR, e);
    } catch (ClientProtocolException e) {
        throw new RESTClientException("Incompatible server protocol", Reason.SERVICE_ERROR, e);
    } catch (UnsupportedEncodingException e) {
        throw new RESTClientException("Failure encoding request data", Reason.INTERNAL_ERROR, e);
    } catch (IOException e) {
        throw new RESTClientException("Network error", Reason.NO_CONNECTION);
    }

如果发生IOException，我将显示网络错误消息。但是如何解决这个问题却没有发生。将setConnectionTimeout，setSoTimeout值增加到60秒有助于解决这个问题吗？