Question

我正在为我的联系人应用程序使用选项卡式布局。使用搜索视图时，我需要隐藏选项卡布局（需要在选项卡的位置显示搜索视图）。选项卡布局是在MainActivity中设置的。我正在尝试在名为“联系人片段”的片段中隐藏标签布局。

MainActivity.java -

public class MainActivity extends AppCompatActivity {

    TabLayout tab;
    ViewPager viewPager;
    RecyclerViewAdapter adapter;



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

        tab = findViewById(R.id.tab);
        viewPager = findViewById(R.id.viewPager);


        ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
        viewPager.setAdapter(adapter);

        viewPager.setCurrentItem(2);
        tab.setupWithViewPager(viewPager);

    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">


    <android.support.design.widget.TabLayout
        android:id="@+id/tab"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:tabBackground="@color/colorPrimary"
        app:tabTextColor="@color/offWhite"
        app:tabIndicatorColor="@android:color/white"
        app:tabSelectedTextColor="@android:color/white"
        app:tabIndicatorHeight="2dp"
        >

    </android.support.design.widget.TabLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    </android.support.v4.view.ViewPager>

</LinearLayout>

ContactsFragment.java

    public class ContactsFragment extends Fragment {
    BottomNavigationView bottomNavigation;
    DBHelper dbHelper;


    public ContactsFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for getActivity() fragment
        final View view = inflater.inflate(R.layout.fragment_contacts, container, false);

        AddFrag(new ContactsHomeFragment(), 0);

        bottomNavigation = view.findViewById(R.id.bottomNav);

        bottomNavigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                int id = item.getItemId();

                if (id == R.id.navNew) {
                    AddFrag(new NewContactFragment(), 1);
                } else if (id == R.id.navDelete) {
                    AddFrag(new DeleteContactFragment(), 1);
                } else if (id == R.id.navHome) {
                    AddFrag(new ContactsHomeFragment(), 1);
                } else if (id == R.id.navSearch) {
                    AddFrag(new SearchContactFragment(), 1);
view.findViewById(R.id.tab).setVisibility(View.INVISIBLE);
                }

                return true;

            }

        });

        dbHelper = DBHelper.getDB(getActivity());

        if (!dbHelper.checkDB()) {
            dbHelper.createDB(getActivity());
        }

        dbHelper.openDB();


        if (dbHelper.getCount() == 0) {
            bottomNavigation.setSelectedItemId(R.id.navNew);
        } else {
            bottomNavigation.setSelectedItemId(R.id.navHome);
        }


        return view;
    }

    public void AddFrag(Fragment fragment, int flag) {
        FragmentManager fm = getFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();

        if (flag == 0) {
            ft.add(R.id.container, fragment);
        } else {
            ft.replace(R.id.container, fragment);
        }
        ft.addToBackStack(null);
        ft.commit();
    }
}

fragment_contacts.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    tools:context=".ContactsFragment"
    android:orientation="vertical">


    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="?attr/actionBarSize">

    </FrameLayout>

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/bottomNav"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:menu="@menu/nav_items"
        android:layout_alignParentBottom="true">

    </android.support.design.widget.BottomNavigationView>

</RelativeLayout>

Answer 1

在MainActivity中，设置一个公共功能以设置选项卡布局的可见性，请使用View.GONE将其隐藏。然后在片段中，只要您想隐藏TabLayout，请使用

((MainActivty)getActivity()).yourMethodToHideTabBar();

如何在特定片段中隐藏Tab布局？

1 个答案: