com.cpp255.bookbarcode.DouBanBookInfoXmlParser.java Source code

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Here is the source code for com.cpp255.bookbarcode.DouBanBookInfoXmlParser.java

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/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.cpp255.bookbarcode;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.util.Xml;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import com.cpp255.bookbarcode.book.BookInfo;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;

/**
 * This class parses XML feeds from stackoverflow.com. Given an InputStream
 * representation of a feed, it returns a List of entries, where each list
 * element represents a single entry (post) in the XML feed.
 */
public class DouBanBookInfoXmlParser {
    public static final String TAG = DouBanBookInfoXmlParser.class.getSimpleName();
    // ??
    public static final String ISBN_URL = "https://api.douban.com/v2/book/isbn/"; // ?JSON??
    public static final int RETURN_BOOKINFO_STATUS = 200; //?
    public static final int BOOK_NOT_FOUND_STATUS = 404; //?
    // public static final String ISBN_URL =
    // "http://api.douban.com/book/subject/isbn/"; //?XML??

    /**
     * ?isbn???
     * 
     * @param isbnNo
     * @return
     * @throws IOException
     */
    public BookInfo fetchBookInfoByXML(String isbnNo) throws IOException {
        String requestUrl = ISBN_URL + isbnNo;
        URL url = new URL(requestUrl);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.connect();
        if (conn.getResponseCode() == RETURN_BOOKINFO_STATUS) {
            InputStream is = conn.getInputStream();
            InputStreamReader isr = new InputStreamReader(is, "utf-8");
            BufferedReader br = new BufferedReader(isr);
            StringBuilder sb = new StringBuilder();

            String line = null;
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }

            br.close();
            return readBookInfo(sb.toString());
        }

        return null;
    }

    // ??
    private BookInfo readBookInfo(String jsonStr) {
        JSONObject jsonObject;
        String nodeInfo = null;
        BookInfo bookInfo = new BookInfo();

        try {
            jsonObject = new JSONObject(jsonStr);
            nodeInfo = jsonObject.getString("title");
            bookInfo.setTitle(nodeInfo);
            bookInfo.setAuthor(parseJSONArraytoString(jsonObject.getJSONArray("author")));
            nodeInfo = jsonObject.getString("pubdate");
            bookInfo.setPublishDate(nodeInfo);
            nodeInfo = jsonObject.getString("publisher");
            bookInfo.setPublisher(nodeInfo);
            nodeInfo = jsonObject.getString("image");
            bookInfo.setThumbnail(DownloadBitmap(nodeInfo));
            nodeInfo = jsonObject.getString("price");
            bookInfo.setPrice(nodeInfo);
            nodeInfo = jsonObject.getString("summary");
            bookInfo.setSummary(nodeInfo);
            nodeInfo = jsonObject.getString("isbn13");
            bookInfo.setISBN(Long.parseLong(nodeInfo));
            nodeInfo = jsonObject.getString("rating");
            bookInfo.setRating(nodeInfo);
            nodeInfo = jsonObject.getString("translator");
            bookInfo.setTranslator(nodeInfo);
            nodeInfo = jsonObject.getString("pages");
            bookInfo.setPages(Integer.parseInt(nodeInfo));
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return bookInfo;
    }

    public Bitmap DownloadBitmap(String bitmapUrl) {
        Bitmap bitmap = null;
        BufferedInputStream bis = null;

        try {
            URL url = new URL(bitmapUrl);
            URLConnection conn = url.openConnection();
            bis = new BufferedInputStream(conn.getInputStream());
            bitmap = BitmapFactory.decodeStream(bis);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (bis != null)
                    bis.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        return bitmap;
    }

    public String parseJSONArraytoString(JSONArray array) {
        StringBuffer str = new StringBuffer();
        for (int i = 0; i < array.length(); i++) {
            try {
                str = str.append(array.getString(i)).append(" ");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return str.toString();
    }
}