WebView 工作记录

为移动设备而改造网页

http://newhtml.net/modify-page-for-mobile/

http://www.html5rocks.com/en/mobile/mobifying/

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关于link .css或.js

在pc上第二次请求服务器会返回304

在webview跟本不会发起第二次请求。直接会读取缓存。

Tool to see android database, tables and data

http://stackoverflow.com/questions/2149438/tool-to-see-android-database-tables-and-data

There is a tool (sqlite3) installed on the phone itself. You should be able to do this if you have ADB installed on your machine & your phone is connected or currently being emulated.

Find the database files:

adb shell find /data -name *.db
/data/data/com.google.android.apps.maps/databases/search_history.db
/data/data/com.qo.android.htc/databases/webview.db
/data/data/com.qo.android.htc/databases/webviewCache.db
/data/data/com.layar/databases/layar.db

或者select your database (Into Androd --> File Explorer )，You will get an option as "pull a file from device", click on it. 

Open a database using the sqlite tool:

C:\> adb shell 
# sqlite3 /data/data/com.google.android.youtube/databases/history.db

SQLite version 3.5.9
Enter ".help" for instructions
sqlite> .tables
android_metadata  suggestions

sqlite> .schema suggestions
CREATE TABLE suggestions (_id INTEGER PRIMARY KEY,display1 TEXT UNIQUE ON CONFLICT REPLACE,display2 TEXT,query TEXT,date LONG);

sqlite> select * from suggestions;
2|randy pausch last lecture|Results for "randy pausch last lecture"|randy pausch last lecture|1264159994987

或者sqlite database browser could also be helpful, though you need to pull a copy of the database from the device as explained before and work on that copy that can be restored later on.

在android 4.0 webview 使用loadData 会出现中文乱码， 这个时候要使用loadDataWithBaseURL方法

//loadData(html, "text/html", "UTF-8");
loadDataWithBaseURL(null, html, "text/html", "UTF-8", null);

注意的问题：

android 4.0的特殊性---参数

<img src="images/laba.png">
<img src="images/laba.png?v=2">

当加载本地页面（如放在assets下面），在4.0的webview 上第二张图片不能显示，加载本地文件不能带参数

android 4.0的特殊性---特殊符号

4.0对于页面里的特殊符号，可能也会导致无法解析，使js方法不能执行完成。

js方法里的换行

webview对于js方法里的换行无法解析！

ios的uiwebview，meta里用逗号，而不能用分号

<meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />

android 2.2的特殊性---window.demo.fun()

android客户端方法String fun();

js调用，返回的是Object类型，而不是String，这个问题出现的android2.2（2.3及以上是ok的）的机型上。

解决办法：window.demo.fun() + ""

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