学步园

可以使用SharedPreferences或者SQLite来保存用户信息

private static HashMap<String,String>  CookieContiner=new HashMap<String,String>() ;
    /**
	 * 保存Cookie
	 * @param resp
	 */
    public void SaveCookies(HttpResponse httpResponse)
    {
    	Header[] headers = httpResponse.getHeaders("Set-Cookie");
    	String headerstr=headers.toString();
        if (headers == null)
            return;

        for(int i=0;i<headers.length;i++)
        {
        	String cookie=headers[i].getValue();
        	String[]cookievalues=cookie.split(";");
        	for(int j=0;j<cookievalues.length;j++)
        	{
        		String[] keyPair=cookievalues[j].split("=");
        		String key=keyPair[0].trim();
        		String value=keyPair.length>1?keyPair[1].trim():"";
        		CookieContiner.put(key, value);
        	}
        }
    }
    /**
     * 增加Cookie
     * @param request
     */
    public void AddCookies(HttpPost request)
    {
        StringBuilder sb = new StringBuilder();
        Iterator iter = CookieContiner.entrySet().iterator();
        while (iter.hasNext()) {
          Map.Entry entry = (Map.Entry) iter.next();
          String key = entry.getKey().toString();
          String val = entry.getValue().toString();
          sb.append(key);
          sb.append("=");
          sb.append(val);
          sb.append(";");
        }
        request.addHeader("cookie", sb.toString());
    } 

做了一个android网络应用，要求用自己实现的webview去访问web网站，并且在远程登录成功之后把cookie写入到手机，保留用作以后的自动登录。找了好多资料。发觉读取cookies倒还用的很普遍，可是通过程序写cookie却没有太多资料。
先来看一下如何读取cookie吧：
try
        {
          DefaultHttpClient httpclient = new DefaultHttpClient();
          HttpGet httpget = new HttpGet("http://www.hlovey.com/");
          HttpResponse response = httpclient.execute(httpget);
          HttpEntity entity = response.getEntity();
          List<Cookie> cookies = httpclient.getCookieStore().getCookies();
          if (entity != null) {
              entity.consumeContent();
          }
        
          if (cookies.isEmpty()) {
            Log.i(TAG, "NONE");
         } else {
             for (int i = 0; i < cookies.size(); i++) {             
               Log.i(TAG,"- domain " + cookies.get(i).getDomain());
               Log.i(TAG,"- path " + cookies.get(i).getPath());
               Log.i(TAG,"- value " + cookies.get(i).getValue());
               Log.i(TAG,"- name " + cookies.get(i).getName());
               Log.i(TAG,"- port " + cookies.get(i).getPorts());
               Log.i(TAG,"- comment " + cookies.get(i).getComment());
               Log.i(TAG,"- commenturl" + cookies.get(i).getCommentURL());
               Log.i(TAG,"- all " + cookies.get(i).toString());
             }
         }
          httpclient.getConnectionManager().shutdown();
        
        }catch(Exception e){
          //Todo
        }finally{
        //Todo         
        }
通过分析com.android.browser的源码，发现android默认的browser增加cookie是在数据库中增加记录，和window不同，win是采用一个txt文本文件的形式来存储cookie。而android是将cookie存储在数据库中。具体的介绍在《android cookie存储位置》一文中有介绍。我们都知道，android每个应用程序的存储空间都是独立的。不管使用preference还是database存储，都会在每个/data/data/package name/下面进行存储（preference存储在/data/data/package name/shared_prefs/xxxx.xml）。前面也说到cookie是存在数据库中，那么如果采用非浏览器访问网络需要保留cookie的话我们就应该在database中建立cookies表，并且存入相应的cookies数据。仿照默认broswer的代码：
/**声明一些数据库操作的常量*/
  private static SQLiteDatabase mDatabase = null;
  private static final String DATABASE_FILE = "webview.db";
  private static final String COOKIES_NAME_COL = "name";
  private static final String COOKIES_VALUE_COL = "value";
  private static final String COOKIES_DOMAIN_COL = "domain";
  private static final String COOKIES_PATH_COL = "path";
  private static final String COOKIES_EXPIRES_COL = "expires";
  private static final String COOKIES_SECURE_COL = "secure";
mDatabase = LoginApiActivity.this.openOrCreateDatabase(DATABASE_FILE, 0, null);
//创建cookie数据库
    if (mDatabase != null) {
      // cookies
      mDatabase.execSQL("CREATE TABLE IF NOT EXISTS cookies "
              + " (_id INTEGER PRIMARY KEY, "
              + COOKIES_NAME_COL + " TEXT, " + COOKIES_VALUE_COL
              + " TEXT, " + COOKIES_DOMAIN_COL + " TEXT, "
              + COOKIES_PATH_COL + " TEXT, " + COOKIES_EXPIRES_COL
              + " INTEGER, " + COOKIES_SECURE_COL + " INTEGER" + ");");
      mDatabase.execSQL("CREATE INDEX IF NOT EXISTS cookiesIndex ON "
              + "cookies" + " (path)");
    }
  }
 
/*写cookie*/
  public void addCookie(Cookie cookie) {
    if (cookie.getDomain() == null || cookie.getPath() == null || cookie.getName() == null
            || mDatabase == null) {
        return;
    }
    String mCookieLock = "asd";
    synchronized (mCookieLock) {
        ContentValues cookieVal = new ContentValues();
        cookieVal.put(COOKIES_DOMAIN_COL, cookie.getDomain());
        cookieVal.put(COOKIES_PATH_COL, cookie.getPath());
        cookieVal.put(COOKIES_NAME_COL, cookie.getName());
        cookieVal.put(COOKIES_VALUE_COL, cookie.getValue());
 
        mDatabase.insert("cookies", null, cookieVal);
      
    }
}