Activity和Fragment页面 TAB

Activity和Fragment页面 TAB

  private TabLayout myTab;
    private ViewPager2 myPager2;
 
    List titles=new ArrayList<>();
   // List fragments=new ArrayList<>();
    List fragments=new ArrayList<>();
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_milkpayback);
 
 
        myTab = findViewById(R.id.my_tab);
        myPager2 = findViewById(R.id.my_pager2);
 
        //添加标题
        titles.add("销售");
 
        titles.add("进货");
        //添加Fragment进去
        fragments.add(new sellFragment());
        fragments.add(new inkuspragment());
 
        //实例化适配器
        FgTabAdapter myAdapter= new FgTabAdapter(getSupportFragmentManager(),getLifecycle(),fragments);//getSupportFragmentManager()
        //设置适配器
        myPager2.setAdapter(myAdapter);
        //TabLayout和Viewpager2进行关联
        new TabLayoutMediator(myTab, myPager2, new TabLayoutMediator.TabConfigurationStrategy() {
            @Override
            public void onConfigureTab(@NonNull TabLayout.Tab tab, int position) {
                tab.setText(titles.get(position));
            }
        }).attach();
 
       // myTab.getTabAt(1).select(); //默认选中某项放在加载viewpager之后  TabLayout 默认某个选项卡选中
 
    }

Fragment页面

 //设置所在activity的引用
    Activity activity;
    View view;
    private TabLayout myTab;
    private ViewPager2 myPager2;
 
    List titles=new ArrayList<>();
    // List fragments=new ArrayList<>();
    List fragments=new ArrayList<>();
 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        // return inflater.inflate(R.layout.fragment_sell, container, false);
      //  view = inflater.inflate(R.layout.fragment_sell, null);
        view = inflater.inflate(R.layout.fragment_sell, null);
 
        activity=getActivity();
 
 
 
 
        myTab= (TabLayout) view.findViewById(R.id.tab_main);
        myPager2 = (ViewPager2) view.findViewById(R.id.vp_main);
        //添加标题
        titles.add("收银");
 
        titles.add("退货");
        titles.add("订单");
        titles.add("充值");
        //添加Fragment进去
        fragments.add(new OnespsellpayFragment());
        fragments.add(new onespsellreturnSPFragment());
        fragments.add(new OnespsellorderSPFragment());
        fragments.add(new onespsellInmoneyFragment());
        //实例化适配器
        ViewPageFragAdapter myAdapter= new ViewPageFragAdapter(getActivity().getSupportFragmentManager(),getLifecycle(),fragments);//getSupportFragmentManager()
        //设置适配器
        myPager2.setAdapter(myAdapter);
        //TabLayout和Viewpager2进行关联
        new TabLayoutMediator(myTab, myPager2, new TabLayoutMediator.TabConfigurationStrategy() {
            @Override
            public void onConfigureTab(@NonNull TabLayout.Tab tab, int position) {
                tab.setText(titles.get(position));
            }
        }).attach();
 
        return view;
 
 
 
    }