我在MainActivity类中实现了底部导航栏，它有两个片段。我在两个片段中都发出了Retrofit请求。问题是，当我切换片段并返回到前一个片段时，它再次发出请求，之前的数据丢失。我不希望这样，我希望在发出请求后，数据保留在片段中。
下面是我的代码：

• • 主要活动类别**

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    toolbar.setTitle("Home");

    HomeFragment fragment = new HomeFragment();
    FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
    fragmentTransaction.replace(R.id.container, fragment);
    fragmentTransaction.commit();

    bottomBar = findViewById(R.id.bottomBar);

    bottomBar.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {

           switch(item.getItemId()){

               case R.id.navigation_home:

                   HomeFragment fragment = new HomeFragment();
                   FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
                   fragmentTransaction.replace(R.id.container, fragment);
                   fragmentTransaction.commit();

                   toolbar.setTitle("Home");

                   return true;

               case R.id.navigation_video:

                   VideoFragment fragment1 = new VideoFragment();
                   FragmentTransaction fragmentTransaction1 = getSupportFragmentManager().beginTransaction();
                   fragmentTransaction1.replace(R.id.container, fragment1);
                   fragmentTransaction1.commit();

                   toolbar.setTitle("Videos");

                   return true;
           }

            return false;
        }
    });
}

• • 主页片段.类**

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_home, container, false);

    recycle = view.findViewById(R.id.recycle);
    LinearLayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
    mLayoutManager.setReverseLayout(true);
    mLayoutManager.setStackFromEnd(true);
    recycle.setLayoutManager(mLayoutManager);
    recycle.setHasFixedSize(true);

    loadFacts();

     return view;

 }

• • 视频片段类**

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_video, container, false);

    recycle = view.findViewById(R.id.recycle);
    LinearLayoutManager mLayoutManager = new LinearLayoutManager(getActivity());
    mLayoutManager.setReverseLayout(true);
    mLayoutManager.setStackFromEnd(true);
    recycle.setLayoutManager(mLayoutManager);
    recycle.setHasFixedSize(true);

    loadVideos();

    return view;

 }

我怎样才能得到我想要的结果？