XML：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".ui.tab.TabActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        tools:ignore="MissingConstraints">
    <com.google.android.material.tabs.TabLayout
        android:layout_width="match_parent"
        android:id="@+id/tab_menu"
        android:layout_height="40dp"
        tools:layout_editor_absoluteX="1dp"
        tools:layout_editor_absoluteY="122dp"
        tools:ignore="MissingConstraints">


    </com.google.android.material.tabs.TabLayout>
    <androidx.viewpager2.widget.ViewPager2
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/tab_viewpager"
        tools:ignore="MissingConstraints" />
    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

Fragment[] list={new BpmFragment(),new BpmFragment(),new BpmFragment()};
    TabLayout tl;
    String[] title={"热量计算器","消耗计算器","每日打卡"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_tab);
        ViewPager2 vp2=(ViewPager2)findViewById(R.id.tab_viewpager);
        tl=(TabLayout)findViewById(R.id.tab_menu);
        for(String s:title)
            tl.addTab(tl.newTab().setText(s));

        vp2.setAdapter(new FragmentStateAdapter(this) {
            @NonNull
            @Override
            public Fragment createFragment(int position) {
                return list[position];
            }

            @Override
            public int getItemCount() {
                return list.length;
            }
        });

        new TabLayoutMediator(tl, vp2, new TabLayoutMediator.TabConfigurationStrategy() {
            @Override
            public void onConfigureTab(@NonNull TabLayout.Tab tab, int i) {
                tab.setText(title[i]);
            }
        }).attach();

    }

//选中状态时
    void switchFragment(int index) {
        if (!Objects.requireNonNull(tl.getTabAt(index)).isSelected()) {
            Objects.requireNonNull(tl.getTabAt(index)).select();
        }
    }

• 本文标题： tablayout与ViewPager2之间如何运用
• 文章分类：【Android】
• 非特殊说明，本文版权归【胡同里的砖头】个人博客 所有，转载请注明出处.

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