Android fragment 管理器内存泄漏

Question

我使用 LeakCanary 来检测我的应用程序的内存泄漏。我的代码有什么问题，为什么会这样？一开始我将 fragment 管理器作为一个新对象引用，然后我尝试了 getSupportFragmentManager()但同样的事情也会发生。

这是日志

    ```
ApplicationLeak(className=com.dev.myApp.ViewDialog, leakTrace=
┬
├─ android.app.ActivityThread
│    Leaking: NO (ActivityThread↓ is not leaking and a class is never leaking)
│    GC Root: System class
│    ↓ static ActivityThread.sCurrentActivityThread
├─ android.app.ActivityThread
│    Leaking: NO (ArrayMap↓ is not leaking)
│    ↓ ActivityThread.mActivities
├─ android.util.ArrayMap
│    Leaking: NO (Object[]↓ is not leaking)
│    ↓ ArrayMap.mArray
├─ java.lang.Object[]
│    Leaking: NO (ActivityThread$ActivityClientRecord↓ is not leaking)
│    ↓ array Object[].[3]
├─ android.app.ActivityThread$ActivityClientRecord
│    Leaking: NO (Editor↓ is not leaking)
│    ↓ ActivityThread$ActivityClientRecord.activity
├─ com.dev.myApp.Editor
│    Leaking: NO (Activity#mDestroyed is false)
│    ↓ Editor.dialog
│             ~~~~~~
╰→ com.dev.myApp.ViewDialog
​     Leaking: YES (Fragment#mFragmentManager is null and ObjectWatcher was watching this)
​     key = b2133c35-3af8-4631-81da-f73578e0dd12
​     watchDurationMillis = 62684
​     retainedDurationMillis = 57683
, retainedHeapByteSize=772214)```

这是Java代码

ViewDialog dialog;

public void showMyDialog(int position, String type){
    Bundle bundle = new Bundle();
    bundle.putInt(CONST.POSITION, position);
    bundle.putString(CONST.TYPE, type);
    dialog = new ViewDialog();
    dialog.setArguments(bundle);
    dialog.show(getSupportFragmentManager(), "apps_list");
}

public void hideDialog(){
    if (dialog != null) {
        dialog.dismiss();
    }
}

Answer 1

在 hideDialog() 中将 Editor.dialog 设置为 null，以便可以正确地对其进行垃圾收集。