content: package allen.town.podcast.parser.feed;
  
  import allen.town.podcast.model.feed.Chapter;
  import org.json.JSONArray;
  import org.json.JSONException;
  import org.json.JSONObject;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class PodcastIndexChapterParser {
      public static List<Chapter> parse(String jsonStr) {
          try {
              List<Chapter> chapters = new ArrayList<>();
              JSONObject obj = new JSONObject(jsonStr);
              JSONArray objChapters = obj.getJSONArray("chapters");
              for (int i = 0; i < objChapters.length(); i++) {
                  JSONObject jsonObject = objChapters.getJSONObject(i);
                  int startTime = jsonObject.optInt("startTime", 0);
                  String title = jsonObject.optString("title");
                  String link = jsonObject.optString("url");
                  String img = jsonObject.optString("img");
                  chapters.add(new Chapter(startTime * 1000L, title, link, img));
              }
              return chapters;
          } catch (JSONException e) {
              e.printStackTrace();
          }
          return null;
      }
  }
  