Android/folioreader/src/main/java/com/folioreader/ui/base/WikipediaTask.java

   1 package com.folioreader.ui.base;
   2
   3 import android.os.AsyncTask;
   4 import android.util.Log;
   5
   6 import com.folioreader.model.dictionary.Wikipedia;
   7 import com.folioreader.util.AppUtil;
   8
   9 import org.json.JSONArray;
  10 import org.json.JSONException;
  11
  12 import java.io.BufferedReader;
  13 import java.io.IOException;
  14 import java.io.InputStream;
  15 import java.io.InputStreamReader;
  16 import java.net.URL;
  17 import java.net.URLConnection;
  18
  19 /**
  20  * @author gautam chibde on 4/7/17.
  21  */
  22
  23 public class WikipediaTask extends AsyncTask<String, Void, Wikipedia> {
  24
  25     private static final String TAG = "WikipediaTask";
  26
  27     private WikipediaCallBack callBack;
  28
  29     public WikipediaTask(WikipediaCallBack callBack) {
  30         this.callBack = callBack;
  31     }
  32
  33     @Override
  34     protected Wikipedia doInBackground(String... strings) {
  35         String strUrl = strings[0];
  36         try {
  37             URL url = new URL(strUrl);
  38             URLConnection urlConnection = url.openConnection();
  39             InputStream inputStream = urlConnection.getInputStream();
  40             BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, AppUtil.charsetNameForURLConnection(urlConnection)));
  41             StringBuilder stringBuilder = new StringBuilder();
  42             String line;
  43             while ((line = bufferedReader.readLine()) != null) {
  44                 stringBuilder.append(line);
  45             }
  46
  47             try {
  48                 JSONArray array = new JSONArray(stringBuilder.toString());
  49
  50                 if (array.length() == 4) {
  51                     try {
  52                         Wikipedia wikipedia = new Wikipedia();
  53                         wikipedia.setWord(array.get(0).toString());
  54                         JSONArray defs = (JSONArray) array.get(2);
  55                         wikipedia.setDefinition(defs.get(0).toString());
  56                         JSONArray links = (JSONArray) array.get(3);
  57                         wikipedia.setLink(links.get(0).toString());
  58                         return wikipedia;
  59                     } catch (Exception e) {
  60                         Log.e(TAG, "WikipediaTask failed", e);
  61                         return null;
  62                     }
  63
  64                 } else {
  65                     return null;
  66                 }
  67             } catch (JSONException e) {
  68                 Log.e(TAG, "WikipediaTask failed", e);
  69                 return null;
  70             }
  71         } catch (IOException e) {
  72             Log.e(TAG, "WikipediaTask failed", e);
  73         }
  74         return null;
  75     }
  76
  77     @Override
  78     protected void onPostExecute(Wikipedia wikipedia) {
  79         super.onPostExecute(wikipedia);
  80         if (wikipedia != null) {
  81             callBack.onWikipediaDataReceived(wikipedia);
  82         } else {
  83             callBack.onError();
  84         }
  85         cancel(true);
  86     }
  87 }