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viewpagerに4つのフラグメントがあります。断片の1つにはTabLayoutにViewPagerがない他の4つの断片があります。 TabLayoutに最後に表示されたフラグメントの参照を保持し、TabLayoutが再作成されたときにその特定のフラグメントを表示するにはどうすればよいですか？また、クリックするたびにフラグメントをリフレッシュするので、以下の機能が必要です。ViewPagerを使わずにTabLayoutでクリックしたフラグメントを保存する
public class HistoryTabFragment extends BaseFragment {
private static final String ARG_PARAM1 = "param1";
public static final String GET_MY_HISTORY = HistoryTabFragment.class.getName() + ".my_history";
FragmentTabHistoryBinding mBinder;
Shop mShop;
MyHistoryFragment myHistoryFragment;
StandardHistoryFragment standardHistoryFragment;
OpenAccountFragment openAccountFragment;
BacklogFragment backlogFragment;
public HistoryTabFragment() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @return A new instance of fragment HistoryTabFragment.
*/
public static HistoryTabFragment newInstance(Shop shop) {
HistoryTabFragment fragment = new HistoryTabFragment();
Bundle args = new Bundle();
args.putParcelable(ARG_PARAM1, Parcels.wrap(shop));
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
Parcelable parcelable;
parcelable = getArguments().getParcelable(ARG_PARAM1);
mShop = Parcels.unwrap(parcelable);
}
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
mBinder = DataBindingUtil.inflate(inflater, R.layout.fragment_tab_history, container, false);
setUpTabLayout();
bindWidgetWithEvent();
return mBinder.getRoot();
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//sendActionToActivity(GET_MY_HISTORY, mShop);
replaceFragment(myHistoryFragment);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
}
private void setUpTabLayout() {
myHistoryFragment = MyHistoryFragment.newInstance(mShop);
standardHistoryFragment = StandardHistoryFragment.newInstance(mShop);
backlogFragment = BacklogFragment.newInstance(mShop);
openAccountFragment = OpenAccountFragment.newInstance(mShop);
mBinder.tabs.addTab(mBinder.tabs.newTab().setText(R.string.my_offers), true);
mBinder.tabs.addTab(mBinder.tabs.newTab().setText(R.string.standard_offers));
mBinder.tabs.addTab(mBinder.tabs.newTab().setText(R.string.backlog));
mBinder.tabs.addTab(mBinder.tabs.newTab().setText(R.string.open_account));
}
private void bindWidgetWithEvent() {
mBinder.tabs.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
setCurrentTabFragment(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
setCurrentTabFragment(tab.getPosition());
}
});
}
private void setCurrentTabFragment(int tabPosition) {
switch (tabPosition) {
case 0:
replaceFragment(myHistoryFragment);
break;
case 1:
replaceFragment(standardHistoryFragment);
break;
case 2:
replaceFragment(backlogFragment);
break;
case 3:
replaceFragment(openAccountFragment);
break;
}
}
private void replaceFragment(Fragment fragment) {
FragmentManager fm = getChildFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.frame_container, fragment);
ft.addToBackStack(null);
ft.commit();
}
@Override
protected void setTypeface() {
}
private void sendActionToActivity(String action, Shop shop) {
if (mListener == null) {
return;
}
Bundle bundle = new Bundle();
bundle.putString(Constants.ACTION_KEY, action);
bundle.putParcelable(Constants.DATA_KEY_1, Parcels.wrap(shop));
mListener.onFragmentInteraction(bundle);
}
}