How to set connection timeout for JSONParser.makeHttpRequest in Android?

问题

I am getting and posting some data with JSONParser.makeHttpRequest. When the connection is slow it takes a while to get a response and I would like to set the timeout limit to 5 seconds. I found this post showing how to set HttpResponse timeout but couldn't integrate it with JSONParser.

Here is the code I use for HttpRequest

JSONParser jParser = new JSONParser();
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jParser.makeHttpRequest(url, "GET", params);

I will be grateful if I can get a code snippet or a link to another post somewhere else.

回答1:

You can use Asynctask, and stop the request after some time. See examples here.

回答2:

Here is the code:

public class JSONParser {

    static InputStream is = null;
    static JSONObject jObj = null;
    static String json = "";
    int timeout;

// constructor
public JSONParser() {
    timeout = new Values().gettimeout();
}

// function get json from url
// by making HTTP POST or GET method
public JSONObject makeHttpRequest(String url, String method,
        List<NameValuePair> params) {

    // Making HTTP request
    try {
         HttpParams httpParameters = new BasicHttpParams();
         HttpConnectionParams.setSoTimeout(httpParameters, timeout);
        // check for request method
        if(method == "POST"){
            // request method is POST
            // defaultHttpClient
            DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
            HttpPost httpPost = new HttpPost(url);
            httpPost.setEntity(new UrlEncodedFormEntity(params));

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

        }else if(method == "GET"){
            // request method is GET
            DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
            String paramString = URLEncodedUtils.format(params, "utf-8");
            url += "?" + paramString;
            HttpGet httpGet = new HttpGet(url);

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

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    try {
        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();
        json = sb.toString();
    } catch (Exception e) {
        Log.e("Buffer Error", "Error converting result " + e.toString());
    }

    // try parse the string to a JSON object
    try {
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

    // return JSON String
    return jObj;

}
}

the secret is :

     HttpParams httpParameters = new BasicHttpParams();
     HttpConnectionParams.setSoTimeout(httpParameters, timeout);

and set de HttpParams in

 DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);

Adapt you code to do that ;)

来源：https://stackoverflow.com/questions/15867930/how-to-set-connection-timeout-for-jsonparser-makehttprequest-in-android