Remember changes

hi everybody i have a quick question in connection with android studio, im making a app for school but i have a problem where i cant solve it myself, so the problem is that,

if I click on back (a button in second activity) from my second activity I have to go back to my main activity (I did this), but if I go back to my second activity everything is back as it was in the beginning, what I want is when I change something in my second activity and go back to my main, everything that I have changed in my second activity must stay as it was when I changed something, and when I go back from my main to my second, everything that i changed is still there.

i hope you can help me, thank you in advance.

this is mij second activity class code

and this is mij main activity class code

This topic was automatically closed 91 days after the last reply. New replies are no longer allowed.