app/src/main/java/de/dhbwloe/campusapp/network/JsonRequestHelper.java

   1 package de.dhbwloe.campusapp.network;
   2
   3 import android.util.Log;
   4
   5 import com.loopj.android.http.AsyncHttpClient;
   6 import com.loopj.android.http.AsyncHttpResponseHandler;
   7
   8 import org.json.JSONArray;
   9 import org.json.JSONException;
  10 import org.json.JSONObject;
  11
  12 import java.util.List;
  13
  14 import cz.msebera.android.httpclient.Header;
  15
  16 /**
  17  * Created by pk910 on 09.03.2016.
  18  */
  19 public abstract class JsonRequestHelper {
  20
  21     protected void requestJsonFromWeb(String url) {
  22         AsyncHttpClient client = new AsyncHttpClient();
  23
  24         Log.i("HTTPClient", "Request: " + url);
  25         client.get(url, new AsyncHttpResponseHandler() {
  26             @Override
  27             public void onStart() {
  28             }
  29
  30             @Override
  31             public void onSuccess(int statusCode, Header[] headers, byte[] response) {
  32                 String recvStr = new String(response);
  33                 JSONObject jsonObj = null;
  34                 JSONArray jsonArr = null;
  35                 try {
  36                     jsonObj = new JSONObject(recvStr);
  37                 } catch (JSONException e) {
  38                     e.printStackTrace();
  39                 }
  40                 try {
  41                     jsonArr = new JSONArray(recvStr);
  42                 } catch (JSONException e) {
  43                     e.printStackTrace();
  44                 }
  45                 if(jsonObj != null)
  46                     onJsonReceived(jsonObj);
  47                 else if(jsonArr != null)
  48                     onJsonReceived(jsonArr);
  49                 else
  50                     onTextReceived(recvStr);
  51             }
  52
  53             @Override
  54             public void onFailure(int statusCode, Header[] headers, byte[] errorResponse, Throwable e) {
  55                 String error = null;
  56                 try {
  57                     error = new String(errorResponse, "US-ASCII");
  58                 } catch (Exception e1) {
  59                 }
  60                 Log.i("HTTPClient", "  Error: " + statusCode + " - " + error);
  61                 onJsonRequestFail(statusCode, error);
  62             }
  63
  64             @Override
  65             public void onRetry(int retryNo) {
  66             }
  67         });
  68     }
  69
  70     protected abstract void onJsonReceived(JSONObject json);
  71     protected abstract void onJsonReceived(JSONArray json);
  72     protected abstract void onTextReceived(String response);
  73     protected abstract void onJsonRequestFail(int statusCode, String errorMessage);
  74
  75 }