Android下保存简单网页到本地(包括简单图片链接转换)实现代码

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);
 }

 private void deletefile(file file) {
  if (file.exists()) { // 判断文件是否存在
   if (file.isfile()) { // 判断是否是文件
    file.delete(); // delete()方法 你应该知道 是删除的意思;
   } else if (file.isdirectory()) { // 否则如果它是一个目录
    file files[] = file.listfiles(); // 声明目录下所有的文件 files[];
    for (int i = 0; i < files.length; i++) { // 遍历目录下所有的文件
     this.deletefile(files[i]); // 把每个文件 用这个方法进行迭代
    }
   }
   file.delete();
  } else {
   //
  }
 }

 private string formatpath(string path) {
        if (path != null && path.length() > 0) {
            path = path.replace("\\", "_");
            path = path.replace("/", "_");
            path = path.replace(":", "_");
            path = path.replace("*", "_");
            path = path.replace("?", "_");
            path = path.replace("\"", "_");
            path = path.replace("<", "_");
            path = path.replace("|", "_");
            path = path.replace(">", "_");
        }
        return path;
    }
}