清除从活动转移到片段的活动

Question

我在底部导航栏上有一个带有图标的家庭活动。单击图标后，它将移动到相应的片段。但问题是家庭活动堆叠在所有碎片上。这可能是什么问题。

我试过完成（）;在调用片段之后。但这会关闭所有活动并进入主要活动。我需要帮助。

主要活动 - ＆gt; HomeActivity-＆gt;出勤片段

这是家庭活动 Home Activity

单击下面的出勤片段 Attendance fragment

以下是家庭活动的代码

 public class FHome extends AppCompatActivity {
        public static Activity fa;

        private Toolbar toolbar;

        private ListView listView;

        public static SharedPreferences sharedPreferences;

        public static String SEL_DAY;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_fhome);
            setupUIViews();
            initToolbar();
            setupListView();
            fa = this;

            BottomNavigationView bottomNavigationView = (BottomNavigationView)
                    findViewById(R.id.navigation);

            bottomNavigationView.setOnNavigationItemSelectedListener
                    (new BottomNavigationView.OnNavigationItemSelectedListener() {
                        @Override
                        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                            Fragment selectedFragment = null;
                            switch (item.getItemId()) {
                                case R.id.action_item1:
                                    selectedFragment = FAttendance.newInstance();
                                    break;
                                case R.id.action_item2:
                                    selectedFragment = FPost.newInstance();
                                    break;
                                case R.id.action_item3:
                                    selectedFragment = FUpdate.newInstance();
                                    break;
                            }
                            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
                            transaction.replace(R.id.frame_layout, selectedFragment);
                            transaction.commit();
                            return true;
                        }
                    });

            //Manually displaying the first fragment - one time only
            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(R.id.frame_layout, FPost.newInstance());
            transaction.commit();


        }

帮帮我:(