کلاس WebService

من در بعضی از پروژه ها از این استفاده می کنم :

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

import javax.net.ssl.HttpsURLConnection;

public class RequestHandler {

  public String sendPostRequest(String requestURL,
                                HashMap<String, String> postDataParams) {

    HttpURLConnection conn = null;
    URL url;

    StringBuilder sb = new StringBuilder();
    try {
      url = new URL(requestURL);

      conn = (HttpURLConnection) url.openConnection();
      conn.setReadTimeout(15000);
      conn.setConnectTimeout(15000);
      conn.setRequestMethod("POST");
      conn.setDoInput(true);
      conn.setDoOutput(true);


      OutputStream os = conn.getOutputStream();
      BufferedWriter writer = new BufferedWriter(
        new OutputStreamWriter(os, "UTF-8"));
      writer.write(getPostDataString(postDataParams));

      writer.flush();
      writer.close();
      os.close();
      int responseCode = conn.getResponseCode();

      if (responseCode == HttpsURLConnection.HTTP_OK) {
        BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        sb = new StringBuilder();
        String response;
        while ((response = br.readLine()) != null) {
          sb.append(response);

          Log.e(G.log, "Data webService :" + sb.toString());
        }
      }

    } catch (Exception e) {
      e.printStackTrace();

      Log.e(G.log, "Error checking internet connection", e);
      
    } finally {
      if (conn != null) {
        conn.disconnect();
      }
    }
    return sb.toString();
  }

  private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException {
    StringBuilder result = new StringBuilder();
    boolean first = true;
    for (Map.Entry<String, String> entry : params.entrySet()) {
      if (first)
        first = false;
      else
        result.append("&");

      result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
      result.append("=");
      result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));


    }

    return result.toString();
  }
}

اینم طریقه صدا زدنش :

RequestHandler rh = new RequestHandler();
HashMap<String, String> param = new HashMap<>();
param.put("action", "read");
String result = rh.sendPostRequest("http://localhost/example.com", param);

جواب از طرف :kazemian

اگه میخواید از http client استفاده کنید میتونید این کد رو به گریدل اضافه کنیدcompile 'org.jbundle.util.osgi.wrapped:org.jbundle.util.osgi.wrapped.org.apache.http.client:4.1.2'