Creating a Mobile HTML5 Application with App Framework

Core points

• App Framework is a JavaScript library that allows the creation of rich HTML5/JavaScript mobile applications inspired by jQuery but has a much lower memory footprint than jQuery Mobile.
• On Android and iOS platforms, App Framework is faster than jQuery and more powerful, making it a powerful solution for mobile HTML5 frameworks.
• This tutorial walks you through step-by-step instructions on how to create HTML5 mobile applications using the App Framework, from setting up Apache and PHP servers to creating dynamic GUIs.
• App Framework provides most of the jQuery features for mobile devices, with rich libraries and high performance, making it a comprehensive mobile HTML5 framework.
• HTML5 mobile applications are platform-agnostic and are easier to update and maintain than native applications, however, they may not provide the same level of performance or access to all device features.

What is App Framework?

App Framework is a JavaScript library for mobile HTML5 application development. It allows you to build simple, rich and complete HTML5/JavaScript mobile applications. This short tutorial is an introduction to the App Framework, which introduces the basic concepts and main concepts. The App Framework library is inspired by jQuery. The App Framework can design powerful interfaces for mobile devices such as Android or iOS. The App Framework consists of three parts: a query and event management library, a graphical interface library, and a WebKit library plug-in. The library has more functions than jQuery Mobile. Another advantage of App Framework is that it only requires 3KB of memory, while jQuery requires 35KB. On Android, scripts are three times faster than jQuery and 2.2 times faster on iOS.

Competitive Framework

App Framework has several competitive frameworks. These frameworks have roughly the same functions as the App Framework. We can mention some of the most famous frameworks: jQuery Mobile, Sencha Touch, jQTouch. The biggest advantage of App Framework is its lightweight and execution speed. App Framework is the most powerful solution in the mobile HTML 5 framework.

Prerequisites

Create a proxy

For specific requirements of this tutorial, we need to make cross-domain requests via Ajax. To handle these requests, you need to set up Apache and PHP servers. Since JavaScript does not directly manage cross-domain requests, we will set up a small proxy through php. Copy and paste the following code into the server.php file located in the same location as the HTML page. The "php_curl" module must be enabled in php.ini.

<code class="language-php"><?php
$url = $_GET["url"];
$ch = curl_init(); // 检查php.ini中是否启用了php_curl扩展
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$xml = curl_exec($ch);
echo $xml;
curl_close($ch);
?></code>

App Framework

App Framework is a mobile version of jQuery, so both frameworks use the same syntax. For this tutorial, it is best to know some jQuery knowledge. The App Framework can be downloaded from this address. Copy and paste the following folders and files into your site directory: - kitchensink - plugins - ui

Note: To test, you need a browser that is compatible with webkit and HTML5.

Tutorial

We will show you how to build your mobile application using the App Framework with this example. In short, our example will be based on the concept of a small RSS feed reader. This is just to give you an idea of ​​the basics of App Framework. First, we will use jqUI to build our GUI and implement some features using the App Framework.

Create a page

Start one, we will create our page and configure our App Framework. This is a framework for an App Framework application:

<code class="language-php"><?php
$url = $_GET["url"];
$ch = curl_init(); // 检查php.ini中是否启用了php_curl扩展
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$xml = curl_exec($ch);
echo $xml;
curl_close($ch);
?></code>

Create a page named "index.html" in the root directory of the server and add the above code. This code is the basis of the page, which imports the scripts you need to use the App Framework. Our application will be broken down into two components: the page, its content and menu. Using the App Framework, in order to create a page, we will create multiple divs within the "content" div of the HTML file.

We will start by creating our main page "RSS". It will contain an input that allows the user to enter an RSS link and a panel containing a list of titles in the RSS stream. In the "afui" div we will add the "content" div. We will create different pages of the application in this specific div. Our first page is titled "RSS".

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