Dari SetupActivity ke MainActivity

Jadi aplikasi saya ini setelah LoginActivity setelah Login sukses dikirim ke MainActivity dan jika di cek user tsb di database sudah terdaftar tapi belum melakukan pengisisan data maka akan di kirim ke SetupActivity setelah melakukan pengisian data seperti email dan umur secara sukses maka akan dikirimkan kembali ke MainActivity dan login selanjutnya tidak perlu SetupActivity lagi.

Tapi disini masalah nya SetupActivity nya terus muncul jadi setelah tekan tombol save, datanya terkirim secara sukses ke database Firebase nya, tapi layar SetupActivity nya berupa pengisian data email dan umur terus muncul. apa karna ada masalah di pengecekan database atau script nya salah di SetupActivity atau MainActivity ya? Mohon Bantuan nya saya memiliki pengalaman 0 hanya sekedar suka saja belajar2 sedikit.

MainActivity.java

 public class MainActivity extends AppCompatActivity {

    private BottomNavigationView mMainBottomNav;
    private FrameLayout mMainFrame;
    private ActionBarDrawerToggle actionBarDrawerToggle;

    private HomeFragment homeFragment;
    private NotificationsFragment notificationsFragment;
    private MessagesFragment messagesFragment;

    private NavigationView navigationView;
    private DrawerLayout drawerLayout;
    private RecyclerView postList;
    private Toolbar mToolbar;

    private FirebaseAuth mAuth;
    private DatabaseReference UsersRef;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mAuth = FirebaseAuth.getInstance();
        UsersRef = FirebaseDatabase.getInstance().getReference().child("Users");

        navigationView = findViewById(R.id.navigation_view);
        View navView = navigationView.inflateHeaderView(R.layout.navigation_header);

        mMainFrame = findViewById(R.id.main_container);
        mMainBottomNav = findViewById(R.id.main_bottom_nav);

        //Toolbar
        mToolbar = findViewById(R.id.main_page_toolbar);
        setSupportActionBar(mToolbar);
        getSupportActionBar().setTitle("Home");

        homeFragment = new HomeFragment();
        notificationsFragment = new NotificationsFragment();
        messagesFragment = new MessagesFragment();

        // EDITED
        // setFragment(homeFragment);

        drawerLayout = findViewById(R.id.drawable_layout);
        actionBarDrawerToggle = new ActionBarDrawerToggle(MainActivity.this, drawerLayout, R.string.drawer_open, R.string.drawer_close);
        drawerLayout.addDrawerListener(actionBarDrawerToggle);
        actionBarDrawerToggle.syncState();
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener()
        {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem menuItem)
            {
                UserMenuSelector(menuItem);
                return false;
            }
        });
        mMainBottomNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener()
        {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem menuItem)
            {

                switch (menuItem.getItemId())
                {
                    case R.id.nav_home :
                        setFragment(homeFragment);
                        return true;

                    case R.id.nav_notif :
                        setFragment(notificationsFragment);
                        return true;

                    case R.id.nav_messages :
                        setFragment(messagesFragment);
                        return true;

                    default :
                        return false;
                }
            }
        });

    }

    @Override
    protected void onStart()
    {
        super.onStart();
        //Check the user if they are login or not
        FirebaseUser currentUser =  mAuth.getCurrentUser();

        if(currentUser == null)
        {
            SendUserToLandingActivity();
        }
        else
        {
            CheckUserExistence();
        }
    }

    private void CheckUserExistence()
    {
        final String current_user_id = mAuth.getCurrentUser().getUid();

        UsersRef.addValueEventListener(new ValueEventListener()
        {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot)
            {
                if(!dataSnapshot.hasChild(current_user_id))
                {
                    SendUserToSetUpActivity();
                }
                else
                {
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError)
            {
            }
        });
    }

    private void SendUserToMainActivity()
    {
        Intent MainIntent = new Intent(MainActivity.this, MainActivity.class);
        MainIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(MainIntent);
        finish();
    }

    private void SendUserToSetUpActivity()
    {
        Intent SetupIntent = new Intent(MainActivity.this, SetupActivity.class);
        SetupIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(SetupIntent);
        finish();
    }

    private void SendUserToLandingActivity()
    {
        Intent loginIntent = new Intent(MainActivity.this, LandingActivity.class);
        loginIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(loginIntent);
        finish();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        if(actionBarDrawerToggle.onOptionsItemSelected(item))
        {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private void UserMenuSelector(MenuItem menuItem)
    {
        switch (menuItem.getItemId())
        {
            case R.id.nav_profile:
                Toast.makeText(this, "Profile", Toast.LENGTH_SHORT).show();
                break;
            case R.id.nav_bookmarks:
                Toast.makeText(this, "Bookmarks", Toast.LENGTH_SHORT).show();
                break;
            case R.id.nav_settings:
                Toast.makeText(this, "Settings", Toast.LENGTH_SHORT).show();
                break;
            case R.id.nav_about:
                Toast.makeText(this, "About", Toast.LENGTH_SHORT).show();
                break;
            case R.id.nav_logout:
                mAuth.signOut();
                SendUserToLandingActivity();
                break;
        }
    }
}

SetupActivity.java

 public class SetupActivity extends AppCompatActivity {

    private EditText mUserEmail, mUserAge;
    private Button mSaveSetupButton;

    private FirebaseAuth mAuth;
    private DatabaseReference UsersRef;

    String currentUserId;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_setup);

        mAuth = FirebaseAuth.getInstance();

        currentUserId = mAuth.getCurrentUser().getUid();
        UsersRef = FirebaseDatabase.getInstance().getReference().child(currentUserId);
        mUserEmail = findViewById(R.id.userEmailInput);
        mUserAge = findViewById(R.id.userAgeInput);
        mSaveSetupButton = findViewById(R.id.saveSetupButton);

        mSaveSetupButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SaveAccountSetupInformation();
            }
        });
    }

    private void SaveAccountSetupInformation()
    {
        String useremail = mUserEmail.getText().toString();
        String userage = mUserAge.getText().toString();

        if (TextUtils.isEmpty(useremail)) {
            Toast.makeText(this, "Please enter your email.", Toast.LENGTH_SHORT).show();
        }
        if (TextUtils.isEmpty(userage)) {
            Toast.makeText(this, "Please write your age.", Toast.LENGTH_SHORT).show();
        }
        else
        {
            //you can put some progress bar here

            HashMap<String, Object> userMap = new HashMap<String, Object>();
            userMap.put("email", useremail);
            userMap.put("age", userage);
            userMap.put("gender", "");
            userMap.put("loves", "0");
            userMap.put("stars", "0");
            UsersRef.updateChildren(userMap).addOnCompleteListener(new OnCompleteListener() {
                @Override
                public void onComplete(@NonNull Task task)
                {
                    if(task.isSuccessful())
                    {
                        SendUserToMainActivity();
                    }
                    else
                    {
                        String errormessage =  task.getException().getMessage();
                        Toast.makeText(SetupActivity.this, "Error Occured: " + errormessage, Toast.LENGTH_SHORT).show();
                    }
                }
            });
        }

    }

    private void SendUserToMainActivity() {
        Intent MainIntent = new Intent(SetupActivity.this, MainActivity.class);
        MainIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(MainIntent);
        finish();
    }
}