每當我關閉任何片段時，我都會收到未知的 memory 泄漏

Question

我正在制作博客應用程序並在關閉任何片段時得到 memory 泄漏......我試圖找到答案，有些人對 null 說你在 onDestroyView 或 onDestroy 上的意見參考（我都試過了，但它不起作用）和比我剛剛創建沒有任何視圖的空白片段（只是藍色背景），即使我正在關閉 BlankFragment，我仍然得到相同的 memory 泄漏......下面是我用來添加空白片段的代碼

 Fragment blankFragment = new BlankFragment();
 FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
 transaction.hide(userProfileFragment);     //hiding userProfileFragment which is current fragment
 transaction.add(R.id.frame_container, blankFragment,"blank");
 transaction.addToBackStack(null);
 transaction.commit();

在我關閉一個沒有任何意見的空白片段之后..我在 Leak Canary 中收到以下 memory 泄漏警告

┬───
│ GC Root: System class
│
├─ leakcanary.internal.InternalLeakCanary class
│    Leaking: NO (MainActivity↓ is not leaking and a class is never leaking)
│    ↓ static InternalLeakCanary.resumedActivity
├─ MainActivity instance
│    Leaking: NO (HomeFragment↓ is not leaking and Activity#mDestroyed is false)
│    ↓ MainActivity.startingFragment
├─ HomeFragment instance
│    Leaking: NO (UserProfile_Fragment↓ is not leaking and Fragment#mFragmentManager is not        null)
│    Fragment.mTag=home
│    ↓ HomeFragment.mFragmentManager
├─ androidx.fragment.app.FragmentManagerImpl instance
│    Leaking: NO (UserProfile_Fragment↓ is not leaking)
│    ↓ FragmentManagerImpl.mAdded
├─ java.util.ArrayList instance
│    Leaking: NO (UserProfile_Fragment↓ is not leaking)
│    ↓ ArrayList.elementData
├─ java.lang.Object[] array
│    Leaking: NO (UserProfile_Fragment↓ is not leaking)
│    ↓ Object[].[3]
├─ UserProfile_Fragment instance
│    Leaking: NO (Fragment#mFragmentManager is not null)
│    Fragment.mTag=user
│    ↓ UserProfile_Fragment.transaction
│                           ~~~~~~~~~~~
├─ androidx.fragment.app.BackStackRecord instance
│    Leaking: UNKNOWN
│    ↓ BackStackRecord.mOps
│                      ~~~~
├─ java.util.ArrayList instance
│    Leaking: UNKNOWN
│    ↓ ArrayList.elementData
│                ~~~~~~~~~~~
├─ java.lang.Object[] array
│    Leaking: UNKNOWN
│    ↓ Object[].[1]
│               ~~~
├─ androidx.fragment.app.FragmentTransaction$Op instance
│    Leaking: UNKNOWN
│    ↓ FragmentTransaction$Op.mFragment
│                             ~~~~~~~~~
╰→ BlankFragment instance Leaking: YES (ObjectWatcher was watching this because BlankFragment   received Fragment#onDestroy() callback and Fragment#mFragmentManager is null)

Answer 1

UserProfile_Fragment.transaction 可能是導致泄漏的原因，您不應將片段事務保存在 memory 中，因為它保留了 BlankFragment。