大家好，我是网创有方，今天记录下标签布局的实现方法，先看下效果图。

第一步：编写一个activity或者fragment。内含有一个viewpager2的适配器，适配器类型为FragmentStateAdapter。

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public class MediaCreateFragment extends Fragment {private FragmentMediaCreateBinding binding;private TabLayout tabLayout;private ViewPager2 viewPager2;private List<TabMediaFragment> tabMediaFragmentList ;@Nullable@Overridepublic View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {// Inflate the layout for this fragmentbinding = FragmentMediaCreateBinding.inflate(inflater,container,false);View root = binding.getRoot();initView();Log.e("tag","onCreateView中");return root;}private void initView(){}@Overridepublic void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {super.onViewCreated(view, savedInstanceState);tabLayout = binding.tabMediaCreate;viewPager2 = binding.viewPager2Tab;// 初始化Fragment列表和标题tabMediaFragmentList =new ArrayList<>();tabMediaFragmentList.add(TabMediaFragment.newInstance("小红书的内容"));tabMediaFragmentList.add(TabMediaFragment.newInstance("百家号的内容"));tabMediaFragmentList.add(TabMediaFragment.newInstance("今日头条的内容"));List<String> titleList = new ArrayList<>();titleList.add("小红书");titleList.add("百家号");titleList.add("今日头条");// 获取FragmentManager和Lifecycle实例Lifecycle lifecycle = getLifecycle();// 创建并设置适配器MyFragmentStateAdapter adapter = new MyFragmentStateAdapter(getActivity(), tabMediaFragmentList, titleList);// 设置适配器到ViewPager2viewPager2.setAdapter(adapter);// 设置TabLayout与ViewPager2的关联new TabLayoutMediator(tabLayout, viewPager2,(tab, position) -> tab.setText(adapter.getPageTitle(position)) // 设置标签标题).attach();}public class MyFragmentStateAdapter extends FragmentStateAdapter {private  List<TabMediaFragment> tabMediaFragmentList;private  List<String> titles;public MyFragmentStateAdapter(@NonNull FragmentActivity fragmentActivity, List<TabMediaFragment> tabMediaFragmentList, List<String> titles) {super(fragmentActivity);this.tabMediaFragmentList = tabMediaFragmentList;this.titles = titles;}@NonNull@Overridepublic Fragment createFragment(int position) {return tabMediaFragmentList.get(position);}@Overridepublic int getItemCount() {return  tabMediaFragmentList.size();}public String getPageTitle(int position) {return titles.get(position);}}
}​

需要包含标签的list和fragment的list

第二步：编写盛载标签页面的容器framelayout

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/frame_layout"android:layout_width="match_parent"android:layout_height="match_parent"android:background="#000">
<TextViewandroid:id="@+id/tx_show_content"android:layout_width="wrap_content"android:layout_height="match_parent"android:text="测试"android:textSize="25sp"android:textColor="#000"/></FrameLayout>

第三步：编写activity或者fragment的布局。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"xmlns:app="http://schemas.android.com/apk/res-auto"android:orientation="vertical"><com.google.android.material.tabs.TabLayoutandroid:id="@+id/tab_media_create"android:layout_width="match_parent"android:layout_height="wrap_content"app:tabGravity="fill"app:tabMode="scrollable"app:tabIndicatorColor="@color/design_default_color_secondary"app:tabIndicatorFullWidth="true"app:tabSelectedTextColor="@color/design_default_color_primary"app:tabTextColor="@color/purple_200"></com.google.android.material.tabs.TabLayout><androidx.viewpager2.widget.ViewPager2android:id="@+id/viewPager2_tab"android:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"/></LinearLayout>

包含一个tablayout和viewpager2控件。

好了这篇文章到这里就结束了。喜欢的点个关注，收藏。

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