I want to save and open my html code in a browser on my andriod phone

Answer 1

buy a server and upload there

Answer 2

there are free hosting services like altervista.org that let you host your pages for free. It's not something you can build a pro website upon but they are good for beginners to start making a portfolio, learn how ftp works, install wordpress etc etc

Answer 3

Try QPython3 (Python Mobile 3.5.1). It includes the file type .HTML