android - TabView 中 Fragment 的 OnCreateView 中的 LoadData() 调用两次

Question

一旦我的应用程序登录，我就会开始ActivityTwo。在 ActivityTwo 中，我立即调用TabView Fragment其中包含我的三个选项卡。这是 ActivityTwo 中调用 TabView 片段的代码

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_two);
        fm = getSupportFragmentManager();
        final Bundle bundle = new Bundle();
        bundle.putInt("TARGET_FRAGMENT_ID", fragId);
        ChooseTab chooseTab = new ChooseTab();
        chooseTab.setArguments(bundle);
        ft = fm.beginTransaction();
        ft.replace(R.id.frame, chooseTab, add);
        ft.commit();
        });  

这是 ChooseTab Fragment 的代码，它负责设置 TabView

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v = inflater.inflate(R.layout.choose_tab, container, false);
        //-----------------------------------------------------------------------------------
        int position=getArguments().getInt("TARGET_FRAGMENT_ID");
        tabLayout = (TabLayout) v.findViewById(R.id.simpleTabLayout);
        tabLayout.addTab(tabLayout.newTab().setText("Tab1"));
        tabLayout.addTab(tabLayout.newTab().setText("Tab2"));
        tabLayout.addTab(tabLayout.newTab().setText("Tab3"));
        viewPager = (ViewPager) v.findViewById(R.id.simpleViewPager);
        viewPager.setOffscreenPageLimit(3);
        final PagerAdapter adapter = new PagerAdapter(getActivity().getSupportFragmentManager(), tabLayout.getTabCount());
        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
        viewPager.setCurrentItem(position);
        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
                adapter.notifyDataSetChanged();

            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
                adapter.notifyDataSetChanged();
            }


            @Override
            public void onTabReselected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
                adapter.notifyDataSetChanged();
            }
        });
        return v;
    }  

这是 PagerAdapter 的代码

public class PagerAdapter extends FragmentStatePagerAdapter {
        private int mNumOfTabs;

        public PagerAdapter(FragmentManager fm, int NumOfTabs) {
            super(fm);
            this.mNumOfTabs = NumOfTabs;
        }


        @Override
        public Fragment getItem(int position) {
            switch (position) {
                case 0:
                    return new Tab1();
                case 1:
                    return new Tab2();
                case 2:
                    return new Tab3();
                default:
                    return null;
            }
        }

        @Override
        public int getCount() {
            return mNumOfTabs;
        }
    }

这是代码Tab1 onCreateView

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment

        View v = inflater.inflate(R.layout.current_status, container, false);
        fm = getFragmentManager();
        LoadData();
        });
        return v;
    }  

但是当我运行应用程序并在调用 LoadData() 时打印一些日志时，会看到调用了 loadData。如何解决这个问题？

标签： androidandroid-recyclerviewandroid-tablayoutandroid-pageradapter