In Home activity when user photo is clicked go to UserActivities where user can see all activites that he wants to take part in.
If there are no such activities show some text. When one of the activities is clicked go to activity[A] that shows all users that want to take part in the same activity.
In Home activity when user photo is clicked go to UserActivities where user can see all activites that he wants to take part in. If there are no such activities show some text. When one of the activities is clicked go to activity[A] that shows all users that want to take part in the same activity.