Ignore density folders
Adding a WebView to Your Application
Using JavaScript in WebView
Handling Page Navigation
Using Console APIs in WebView
1, Add UrlUtil.java to manage URLs when testing in different web pages
2, Simplify MainActivity.java
Add sample code of a web page from the book:
	Building Android Apps with HTML, CSS, and JavaScript
Simplify MainActivity.java
Load URL when storing data
Update README.md
Fix bug: not loading the right URL of images to show the button border
Change the file structure of the test web site
Add some comments
Modify a comment
Modify a comment
Add task to rewrite UrlUtil for better interface and database support
Add basic AJAX scripts
Add a simple, fixed progress bar
Finish AJAX section