Link a database to an application through a website

Hello. I'm a student in france. For the end of the year i need to do a project. I chose to do an android application but right now i'm a little bit lost. I must make an application wich take data from our website and show them on my phone screen. For that i searched a lot but i couldn't find anything about how could i do it. So i'm asking you today. How could i do that ? I'm using android studio for making my application but i'm lost in how could i show the data scavenged from the website on my screen ?

Thank you in advance for your answers.