Android/Java：为什么我的 ConstraintLayout 泄漏？

Question

根据 LeakCanary 的说法，我的应用存在内存泄漏。

这是MyFragment 的ConstraintLayout。我正在尝试通过将onDestroyView() 中的View 归零来修复它，但没有成功。

请注意，我在MyFragment 中加载MyNestedFragment。

MyFragment.java

public class MyFragment extends Fragment {
    private View view;
    private FragmentManager fragmentManager;
    private Map<String, Fragment> fragments = new HashMap<String, Fragment>();
    private Fragment fragment;
    private ConstraintLayout contentContainer;    

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.myfragment_layout, container, false);

        fragmentManager = getFragmentManager();

        TabLayout tabLayout = (TabLayout) view.findViewById(R.id.myfragment_tablelayout);
        tabLayout.addOnTabSelectedListener(onTabSelectedListener);

        contentContainer = view.findViewById(R.id.myfragment_contentcontainer);

        if (getContext() != null) {
            showFragment(MyNestedFragment.class);
        }

        return view;
    }

    public void showFragment(Class fragmentClass) {
        try {
            if (fragments.containsKey(fragmentClass.toString())) {
                fragment = fragments.get(fragmentClass.toString());
            } else {
                fragment = (Fragment) Class.forName(fragmentClass.getName()).newInstance();
            }

            fragmentManager.beginTransaction().replace(R.id.myfragment_contentcontainer, fragment).commit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        view                = null;
        fragmentManager     = null;
        fragments           = null;
        contentContainer    = null;
    }        
}

知道如何修复内存泄漏吗？

提前致谢！

编辑 1
ConstraintLayout 依赖：
implementation 'com.android.support.constraint:constraint-layout:1.1.3'

Answer 1

如果要显示嵌套片段，请使用childFragmentManager 而不是fragmentManager