Question

我的Android应用程序中有一个使用HttpPost类的方法。它有针对性的sdk 4.4.2正常工作，但我做了一些改动，使目标sdk达到23（6.0）。现在HttpPost类给出了错误。我也读过关于HttpUrlConnection但还不知道如何使用它。这是我的代码

private String getJSON(String URL, JSONObject obj) throws JSONException {
        String responseString = null;
        try {

            HttpPost httppost = new HttpPost(URL);
            StringEntity se = new StringEntity(obj.toString(), HTTP.UTF_8);
            httppost.setHeader("Content-Type", "application/json");

            httppost.setEntity(se);

            HttpParams httpParams = new BasicHttpParams();
            HttpConnectionParams.setConnectionTimeout(httpParams, 30000);
            HttpClient httpclient = new DefaultHttpClient(httpParams);
            HttpResponse httpResponse = httpclient.execute(httppost);

            StatusLine statusLine = httpResponse.getStatusLine();
            int statusCode = statusLine.getStatusCode();
            System.out.println("status code is" + statusCode);
            HttpEntity entity = httpResponse.getEntity();
            responseString = EntityUtils.toString(entity, "UTF-8");
            System.out.println("response string" + responseString);
            Log.i("RESPONSE XML ------> ", "-----> " + responseString);
            return responseString;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return responseString;
    }

请帮助我做什么，或者如果可能的话，提供此功能的课程将适用于23。提前致谢

Answer 1

使用 HttpUrlConnection

将代码中的代码替换为下面给出的代码

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import org.json.JSONException;
import org.json.JSONObject;

public class TestJava {

private String getJSON(String URL, JSONObject obj) throws JSONException {
    URL url;
    HttpURLConnection connection = null;
    try {
        //Create connection
        url = new URL(URL);
        connection = (HttpURLConnection)url.openConnection();
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type",
                "application/json");
        connection.setUseCaches (false);
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setConnectTimeout(30000);
        //Send request
        DataOutputStream wr = new DataOutputStream (
                connection.getOutputStream ());
        wr.write(obj.toString().getBytes("UTF-8"));
        wr.flush ();
        wr.close ();

        //Get Response
        InputStream is = connection.getInputStream();
        BufferedReader rd = new BufferedReader(new InputStreamReader(is));
        String line;
        StringBuffer response = new StringBuffer();
        while((line = rd.readLine()) != null) {
            response.append(line);
            response.append('\r');
        }
        rd.close();
        return response.toString();

    } catch (Exception e) {

        e.printStackTrace();
        return null;

    } finally {

        if(connection != null) {
            connection.disconnect();
        }
    }

}
}

HttpPost在API 23 android中给出错误

1 个答案: