I NEED THE XML LAYOUT and JAVA CODE for these below functionality $2,3,4.$

Android Studio problem. please given the search friends XML layout and search friends java code. make sure the Java code can run it$.$ make sure these functions can work.

function $2-$Add friend $.$The user will be able to add friends that may have

similar interests to them.

function $3-$change background. Users will be able to edit their username from the settings page.

functionm$4-$edit username. Users will be able to edit their username from the

settings page

Citadel is a dynamic social networking program powered by firebase that brings people together through common interests and makes communication easy. Through the platform, users may find friends, message each other, and develop deep friendships in an easy$-$to$-$use setting. Citadel provides all the necessary functionality, including friend

requests, account management, messaging, and privacy and control for the user.