In a standard Java EE web application, the client will typically call to the server via a web form. The information is then either handed over to a Java Servlet which interacts with a database and produces an HTML-formatted response, or it is given to a JavaServer Pages (JSP) document that intermingles HTML and Java code to achieve the same result. Both approaches are often considered inadequate for large projects because they mix application logic with presentation and make maintenance difficult. The goal of Struts is to separate the model (application logic that interacts with a database) from the view (HTML pages presented to the client) and the controller (instance that passes information between view and model). Struts provides the controller (a servlet known as ActionServlet) and facilitates the writing of templates for the view or presentation layer (typically in JSP, but XML/XSLT and Velocity are also supported). The web application programmer is responsible for writing the model code, and for creating a central configuration file struts-config.xml that binds together model, view, and controller.
Android is an open source project of the Open Handset Alliance that has revolutionized the user experience of a mobile device. Android is a platform for mobile devices, which includes an OS, middleware and some key applications. The OS is based on a variant of Linux Kernel. The biggest advantage is that the success of Android depends on the availability of unique and engaging user applications created by developers.
To understand the android platform architecture:
- Difference between Android and other mobile development environments.
- Design, develop, debug, and deploy Android applications,
- Use Android SDK's simulator to test and debug applications,
- Construct user interfaces with built-in views and layouts.
- Advantage of APIs for data storage, retrieval, files, databases etc.
Understanding of Java SE.
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