Android下保存简单网页到本地(包括简单图片链接转

最近在做一个项目涉及到将包含图片的简单网页下载到本地，方便离线时观看，在这里分享一下，大家做下简单修改就可以用到自己的项目中了。（这里用到了AQuery库）

package com.nekocode.xuedao.utils;

import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import Android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.androidquery.AQuery;
import com.androidquery.callback.AjaxCallback;
import com.androidquery.callback.AjaxStatus;
import com.nekocode.xuedao.PublicData;
import com.nekocode.xuedao.PublicData.Subscribe;

public class HtmlStorageHelper {
 private String URL = "http://eduproject.sinaapp.com/fetchurl.php/getcontent/";
 private PublicData pd;
 private AQuery aq;
 private SQLiteDatabase mDB;
 private String mDownloadPath;
 
 public HtmlStorageHelper(Context context) {
  pd = PublicData.getInstance();
  aq = new AQuery(context);
  mDB = context.openOrCreateDatabase("data.db", Context.MODE_PRIVATE, null);
  mDB.execSQL("create table if not exists download_html(_id INTEGER PRIMARY KEY AUTOINCREMENT, content_id TEXT NOT NULL, title TEXT NOT NULL)");
 
  mDownloadPath = pd.mAppPath + "download/";
  File dir_file = new File(pd.mAppPath + "download/");
  if(!dir_file.exists())
   dir_file.mkdir();
 }
 
 public void saveHtml(final String id, final String title) {
  if(isHtmlSaved(id))
   return;
 
  aq.ajax(URL+id, String.class, new AjaxCallback<String>() {
   @Override
   public void callback(String url, String html, AjaxStatus status) {
    File dir_file = new File(mDownloadPath + id);
    if(!dir_file.exists())
     dir_file.mkdir();
   
    Pattern pattern = Pattern.compile("(?<=src=\")[^\"]+(?=\")");
    Matcher matcher = pattern.matcher(html);
    StringBuffer sb = new StringBuffer();
    while(matcher.find()){
     downloadPic(id, matcher.group(0));
     matcher.appendReplacement(sb, formatPath(matcher.group(0)));
    }
    matcher.appendTail(sb);
    html = sb.toString();
   
    writeHtml(id, title, html);
   }
  });
 }
 
 private void downloadPic(String id, String url) {
  File pic_file = new File(mDownloadPath + id + "/" + formatPath(url));
  aq.download(url, pic_file, new AjaxCallback<File>() {
   @Override
   public void callback(String url, final File file, AjaxStatus status) {
   }
  });
 }
 
 private void writeHtml(String id, String title, String html) {
  File html_file = new File(mDownloadPath + id + "/index.html");
  FileOutputStream fos = null;
  try {
   fos=new FileOutputStream(html_file);
            fos.write(html.getBytes());
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                fos.close();
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
 
  ContentValues values = new ContentValues();
  values.put("content_id", id);
  values.put("title", title);
  mDB.insert("download_html", "_id", values);
 }
 
 public boolean isHtmlSaved(String id) {
  File file = new File(mDownloadPath + id);
  if(file.exists()) {
   file = new File(mDownloadPath + id + "/index.html");
   if(file.exists())
    return true;
  }
  deleteHtml(id);
  return false;
 }
 
 public String getTitle(String id) {
  Cursor c = mDB.rawQuery("select * from download_html where content_id=?", new String[]{id});
  if(c.getCount() == 0)
   return null;
 
  c.moveToFirst();
  int index1 = c.getColumnIndex("title");
 
  return c.getString(index1);
 }
 
 public ArrayList<Subscribe> getHtmlList() {
  Cursor c = mDB.rawQuery("select * from download_html", null);
  ArrayList<Subscribe> list = new ArrayList<Subscribe>();
  if(c.getCount() != 0) {
   c.moveToFirst();
   int index1 = c.getColumnIndex("content_id");
   int index2 = c.getColumnIndex("title");
   
   while (!c.isAfterLast()) {
    String id = c.getString(index1);
    if(isHtmlSaved(id)) {
     Subscribe sub = new Subscribe(
       id,
       c.getString(index2),
       Subscribe.FILE_DOWNLOADED
       );
     list.add(sub);
    }
   
    c.moveToNext();
   }
  }
 
  return list;
 }
 
 public void deleteHtml(String id) {
  mDB.delete("download_html", "content_id=?", new String[]{id});
  File dir_file = new File(mDownloadPath + id);
  deleteFile(dir_file);
 }