Http响应错误android

Question

我正在从android应用程序向cgi php服务器发出HTTP请求以获取json响应.我的应用程序在发出HTTP请求之前验证Internet连接是否可用.所有事情都正常运作.问题是我因为在发出HTTP请求后突然死于互联网连接而逐渐关闭.

所以我的问题是

1. 我怎么理解我从服务器得到了回复？
2. 我是否需要保持响应的时间？

Answer 1

这是我完美的Web请求处理运行代码

public JSONObject connectToService(String url, final Context context ) {

    try {
        if(!isConnected(context)){
            return;
        }

        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(url);

        HttpParams httpParameters = httpGet.getParams();
        // Set the timeout in milliseconds until a connection is established.
        int timeoutConnection = 7500;
        HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
        // Set the default socket timeout (SO_TIMEOUT) 
        // in milliseconds which is the timeout for waiting for data.
        int timeoutSocket = 7500;
        HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

        HttpResponse httpResponse = httpClient.execute(httpGet);
        HttpEntity httpEntity = httpResponse.getEntity();
        InputStream is = httpEntity.getContent();

        BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "iso-8859-1"), 8);
        StringBuilder sb = new StringBuilder();

        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();

        String jsonString = sb.toString();
        Log.e("WebServiceHandler", "JSON string returned is"+jsonString.toString());

        JSONObject jsonObject = new JSONObject(jsonString);
        return jsonObject;
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (SocketTimeoutException e) {
        e.printStackTrace();
    } catch (ConnectTimeoutException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (JSONException e) {
        e.printStackTrace();
    }

      return null;
}

public boolean isConnected(Context context) {
    ConnectivityManager connMgr = (ConnectivityManager) 
            context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
    if (networkInfo != null && networkInfo.isConnected()) {
        return true;
    } else {
        return false;
    }
}

此代码用于GET请求,如果您想使用POST请求命中url,则只需相应地更改此行

HttpGet httpGet = new HttpGet(url);

同

HttpPost httpPost = new HttpPost(url);