com.google.android.material.tabs.TabLayout

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一、布局

<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:layout_width="match_parent"android:layout_height="match_parent"android:background="@color/white"android:orientation="vertical"tools:context=".main.MainActivity"><androidx.viewpager2.widget.ViewPager2android:id="@+id/main_viewpager"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_marginBottom="65dp"/><com.google.android.material.tabs.TabLayoutandroid:id="@+id/tab_layout_main"android:layout_width="match_parent"android:background="@color/white"app:tabGravity="fill"app:tabMaxWidth="0dp"app:tabMode="fixed"android:layout_height="65dp" /></RelativeLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="vertical"android:background="@color/transparent"android:gravity="center"><CheckBoxandroid:id="@+id/tb_main_tab_checkbox"android:layout_width="wrap_content"android:layout_height="wrap_content"android:button="@null"android:checked="false"android:focusable="false"android:clickable="false"android:text="" /><TextViewandroid:id="@+id/tv_main_tab_text"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="@dimen/dimen_4"android:text=""android:textSize="@dimen/font_12"android:clickable="false"android:textColor="@drawable/common_tab_text_color" /></LinearLayout>

 

二、界面中使用

private String[] tabs;
private int[] resIds;tabs = this.getResources().getStringArray(R.array.main_tab_btn_name);resIds = new int[]{R.drawable.icon_main_tab_bg,R.drawable.icon_project_tab_bg,R.drawable.icon_block_tab_bg,R.drawable.icon_me_tab_bg};ViewPagerScrollAdapter scrollAdapter = new ViewPagerScrollAdapter(getSupportFragmentManager(), getLifecycle(), fragmentList);binding.mainViewpager.setAdapter(scrollAdapter);binding.mainViewpager.setUserInputEnabled(false);
//        binding.mainViewpager.setOffscreenPageLimit(2);binding.tabLayoutMain.setTabTextColors(R.color.color_3D80FC, R.color.color_3D80FC);mediator = new TabLayoutMediator(binding.tabLayoutMain, binding.mainViewpager, new TabLayoutMediator.TabConfigurationStrategy() {@Overridepublic void onConfigureTab(@NonNull TabLayout.Tab tab, int position) {//自定义TabViewView view = LayoutInflater.from(MainActivity.this).inflate(R.layout.item_main_tab_view, null);view.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT,1));TextView tabView = view.findViewById(R.id.tv_main_tab_text);tabView.setText(tabs[position]);CheckBox checkBox = view.findViewById(R.id.tb_main_tab_checkbox);checkBox.setBackgroundResource(resIds[position]);if (position == 0) {checkBox.setChecked(true);tabView.setSelected(true);}tab.setCustomView(view);}});binding.tabLayoutMain.setSelectedTabIndicatorHeight(0); //去掉下划线binding.tabLayoutMain.setTabRippleColor(ColorStateList.valueOf(getContext().getResources().getColor(R.color.white)));//去掉黑色背景//要执行这一句才是真正将两者绑定起来mediator.attach();

    binding.tabLayoutMain.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {@Overridepublic void onTabSelected(TabLayout.Tab tab) {selectOrLogin();}@Overridepublic void onTabUnselected(TabLayout.Tab tab) {((CheckBox) tab.getCustomView().findViewById(R.id.tb_main_tab_checkbox)).setChecked(false);tab.getCustomView().findViewById(R.id.tv_main_tab_text).setSelected(false);}@Overridepublic void onTabReselected(TabLayout.Tab tab) {selectOrLogin();}});

 

ViewPagerScrollAdapter 

public class ViewPagerScrollAdapter extends FragmentStateAdapter  {private ArrayList<Fragment> fragmentList;public ViewPagerScrollAdapter(@NonNull Fragment fragment) {super(fragment);}public ViewPagerScrollAdapter(@NonNull FragmentActivity fragmentActivity,ArrayList<Fragment> fragmentList) {super(fragmentActivity);this.fragmentList=fragmentList;}@Overridepublic void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {super.onAttachedToRecyclerView(recyclerView);recyclerView.setItemViewCacheSize(fragmentList.size());}public ViewPagerScrollAdapter(@NonNull FragmentManager fragmentManager, @NonNull Lifecycle lifecycle,ArrayList<Fragment> fragmentList) {super(fragmentManager, lifecycle);this.fragmentList=fragmentList;}@NonNull@Overridepublic Fragment createFragment(int position) {// 返回Fragmentreturn fragmentList.get(position);}@Overridepublic int getItemCount() {// 获取Fragment数量return fragmentList.size();}}

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