Creating an application knowing only the HTML

Knowing HTML, CSS and JAVA SCRIPT you can create an Android application ignoring almost completely the JAVA language. The JAVA language is only used to generate the file nome_app.apk representing the file to be published in different mobile devices, where app_name is to be replaced by the name given to the mobile application.

The screen presentation of the application, there are two buttons: App App HTML and JAVA, which refer to the same application created with JAVA and HTML; what wants to show how an application can be generated as well as with the native language JAVA even with only HTML code. In the example application calculates the 'Number of days between two dates'.

To write an application is sufficient to know only HTML, but the application will have limits in the graphic, the parameter and interactivity. Knowing also CSS and JS can create complete applications that may compete with those written in the native language.

Below as the native language refers to visual language 'MIT App Inventor' that writes an online application.

The documentation of the procedure is stated in the guide, represented by?, Whose reading and study is needed to be able to generate their own application.