Edit your file html, css and js directly on your Android device and to submit preview with cool App to build your projects in HTML5. You can to add jQuery, jQuery UI and AngularJS library CDN all versions and immediately see the preview. Save your work in css, js and html in separate project folders in your external storage.
=============
Important notice
To view files saved in your Phone file system I suggest you use the Files by Google application. Unfortunately, the native file systems of some smartphones limit the complete display of folders and files
Thank you for your patience
=============