java在BottomNavigationView中禁用重新选择

Question

在BottomNavigationView中再次单击当前选项卡时，如何禁用重新加载片段

换句话说，如何在BottomNavigationView中禁用重新选择

PS：我正在使用NavigationUI来设置BottomNavigationView

Answer 1

在kotlin中，代码如下所示：

 val navView: BottomNavigationView = findViewById(R.id.nav_view)

 navView.setOnNavigationItemReselectedListener { 
    // do nothing here when reselected
    }

Answer 2

试试这个让我知道穆罕默德·侯赛因

final Fragment fragment1 = new Fragment1();
final Fragment fragment2 = new Fragment2();
final Fragment fragment3 = new Fragment3();
final FragmentManager fm = getSupportFragmentManager();
Fragment active = fragment1; //make the first screen as your active fragment.

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

fm.beginTransaction().add(R.id.main_container, fragment3, "3").hide(fragment3).commit();
        fm.beginTransaction().add(R.id.main_container, fragment2, "2").hide(fragment2).commit();
        fm.beginTransaction().add(R.id.main_container, fragment1, "1").commit();

}

private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
        = new BottomNavigationView.OnNavigationItemSelectedListener() {

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()) {
            case R.id.f1_menu_item:
                fm.beginTransaction().hide(active).show(fragment1).commit();
                active = fragment1;
                return true;

            case R.id.f2_menu_item:
                fm.beginTransaction().hide(active).show(fragment2).commit();
                active = fragment2;
                return true;

            case R.id.f3_menu_item:
               fm.beginTransaction().hide(active).show(fragment3).commit();
              active = fragment3;

                return true;
        }
        return false;
    }
};

在活动中。xml

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/coordinatorlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FBF9F9"
tools:context=".view.HomeScreenActivity"
android:orientation="vertical">


<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:padding="1dp"
    android:id="@+id/main_container">

</FrameLayout>

</RelativeLayout>

如果你困在何处，请告诉我。如果这有效，就接受答案

Answer 3

这是出人意料的简单

    NavigationUI.setupWithNavController(bottomNavigationView, hostNavController);
    bottomNavigationView.setOnNavigationItemReselectedListener(new BottomNavigationView.OnNavigationItemReselectedListener() {
        @Override
        public void onNavigationItemReselected(@NonNull MenuItem item) {
            // Nothing here to disable reselect
        }
    });