做了一個android網絡應用，要求用自己實現的webview去訪問web網站，并且在遠程登錄成功之后把cookie寫入到手機，保留用作以后的自動登錄。找了好多資料。發覺讀取cookies倒還用的很普遍，可是通過程序寫cookie卻沒有太多資料。
先來看一下如何讀取cookie吧：
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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 } |
通過分析com.android.browser的源碼，發現android默認的browser增加cookie是在數據庫中增加記錄，和window不同，win是采用一個txt文本文件的形式來存儲cookie。而android是將cookie存儲在數據庫中。具體的介紹在《android cookie存儲位置》一文中有介紹。我們都知道，android每個應用程序的存儲空間都是獨立的。不管使用preference還是database存儲，都會在每個/data/data/package name/下面進行存儲（preference存儲在/data/data/package name/shared_prefs/xxxx.xml）。前面也說到cookie是存在數據庫中，那么如果采用非瀏覽器訪問網絡需要保留cookie的話我們就應該在database中建立cookies表，并且存入相應的cookies數據。仿照默認broswer的代碼：
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/**聲明一些數據庫操作的常量*/ 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);//創建cookie數據庫 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)"); } } /*寫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); }} |
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/junjieking/article/details/7658551
