Slow HttpPost request on Android

问题

I'm making an app a part of which involves downloading data from my server in JSON format. I'm using HTTP Post to achieve the same. The JSON file I'm downloading is around 2-3 Kb in size. I'm doing all these operations on a different thread.

However, the performance of my app is very unpredictable. I tried debugging it and found that sometimes my app gets stuck at line where I'm creating HttpPost object and sometimes it hardly takes 1-2 seconds to execute that line. What can be the issue ? Can it be because my app is taking lot of memory ? One more thing, my app runs fine second time once I force close it. Thanks !

public String getJSONString(String url) {
    try {
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);
        HttpResponse httpResponse = httpClient.execute(httpPost);
        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());
    }
    return json;

}

}

回答1:

you can try by this code..

                    // Create a new HttpClient and Post Header
        httpclient = new DefaultHttpClient();
        httppost = new HttpPost(your URL) 

        // Sending details in Json Format
        JSONObject holder = new JSONObject();
        try { 
                     ------------
                   --------------

                } catch (JSONException e1) {
            e1.printStackTrace();
        }

    StringEntity se = new StringEntity(holder.toString());
    se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE,"application/json"));
    httppost.setEntity(se);
    response = httpclient.execute(httppost);



            // Sends data to server

        StringEntity se = new StringEntity(holder.toString());

        se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE,
                "application/json"));

        httppost.setEntity(se);

        response = httpclient.execute(httppost);

        resp = response.toString();

        String responseServer = EntityUtils.toString(response.getEntity());

回答2:

I saw this post while having the same problem as you

HTTP Post requests using HttpClient take 2 seconds, why?

can you confirm if its working?

HttpParams params = new BasicHttpParams();
params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
HttpClient httpclient = new DefaultHttpClient(params);

来源：https://stackoverflow.com/questions/12890404/slow-httppost-request-on-android

标签

android

json

http-post