Keep current user information in custom application class - don't do it

ActionBar.java

if(MyApplication.getCurrentUser() != null){
    userInfoStatus.setText(MyApplication.getCurrentUser().getFirstName());
}

MyApplication.java

package pl.brightinventions.bezpiecznyautobus;
import android.app.Application;

class User {}

public class MyApplication extends Application {
    private static User currentUser;
    public static User getCurrentUser(){
        return currentUser;
    }
    public static void setCurrentUser(User user){
        currentUser = user;
    }
    @Override
    public void onCreate() {
        super.onCreate();
    }
}

Session.java

package pl.application.login;
import pl.application.user.CurrentUserInfo;
import pl.application.user.User;

public interface CurrentUserInfo {
    boolean isLoggedIn();
    String getName();
}

@Singleton
class InMemorySession implements CurrentUserInfo {
    private User user;
    void setCurrentUser(User user){
        user = user;
    }
    void reset(){
        setCurrentUser(null);
    }
    @Override
    public boolean isLoggedIn() {
        return user != null;
    }
    @Override
    public String getName() {
        return user.getName();
    }
}

// Component requesting information current user
public class AppBeahvior {
    CurrentUserInfo _currentUserInfo;
    @Inject
    public AppBeahvior(CurrentUserInfo currentUserInfo){
        _currentUserInfo = currentUserInfo;
    }
    public void doSomeWork(){
        Log.d("AppBehavior", "Current user name is " + _currentUserInfo.getName());
    }
}

User.java

public class User {
    private static User currentUser;
    public static User getCurrentUser() {
        return currentUser;
    }
    public static boolean isLoggedIn() {
        return currentUser != null;
    }
    static void setCurrentUser(User user) {
        currentUser = user;
    }
}