SupportMapFragment正在泄漏内存

Question

我正在尝试新版本的GoogleMap

com.google.android.libraries.maps:maps:3.1.0-beta

但是当我回到以前的活动时，它似乎会漏出记忆。

我在活动中使用片段

以下是代码：

XML

<androidx.fragment.app.FragmentContainerView
        android:id="@+id/map"
        android:name="com.google.android.libraries.maps.SupportMapFragment"
        android:layout_width="0dp"
        android:layout_height="220dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:useViewLifecycle="true"
        tools:context=".OutputScreen"/>

Java代码

    public class OutputScreen extends FragmentActivity implements OnMapReadyCallback{
    
    
    private GoogleMap map;
    private SupportMapFragment mapFragment;
    
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            
            //setting layout
    
            mapFragment = (SupportMapFragment) 
            getSupportFragmentManager().findFragmentById(R.id.map);
            mapFragment.getMapAsync(this);
        }

        @Override
        public void onMapReady(GoogleMap googleMap) {
          map = googleMap;
        }

        @Override
        protected void onDestroy() {
          if (map != null){
              map.clear();
              map.setMyLocationEnabled(false)
              map = null;
          }
        }
    }

LeakCanary报告

   ┬───
│ GC Root: System class
│
├─ android.provider.FontsContract class
│    Leaking: NO (Application↓ is not leaking and a class is never leaking)
│    ↓ static FontsContract.sContext
├─ android.app.Application instance
│    Leaking: NO (Application is a singleton)
│    Application does not wrap an activity context
│    ↓ Application.mActivityLifecycleCallbacks
│                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~
├─ java.util.ArrayList instance
│    Leaking: UNKNOWN
│    ↓ ArrayList.elementData
│                ~~~~~~~~~~~
├─ java.lang.Object[] array
│    Leaking: UNKNOWN
│    ↓ Object[].[5]
│               ~~~
├─ com.google.android.libraries.maps.dj.zzf instance
│    Leaking: UNKNOWN
│    ↓ zzf.zza
│          ~~~
├─ com.google.android.libraries.maps.dj.zzd instance
│    Leaking: UNKNOWN
│    ↓ zzd.zzd
│          ~~~
├─ com.google.android.libraries.maps.bm.zzu instance
│    Leaking: UNKNOWN
│    ↓ zzu.zzd
│          ~~~
├─ com.google.android.libraries.maps.kf.zzab instance
│    Leaking: UNKNOWN
│    ↓ zzab.zzh
│           ~~~
├─ com.google.android.libraries.maps.kf.zzd instance
│    Leaking: UNKNOWN
│    ↓ zzd.zzi
│          ~~~
├─ com.google.android.libraries.maps.ed.zzau instance
│    Leaking: YES (View detached and has parent)
│    mContext instance of android.app.Application, not wrapping activity
│    View#mParent is set
│    View#mAttachInfo is null (view detached)
│    View.mWindowAttachCount = 1
│    ↓ zzau.mParent
├─ android.widget.FrameLayout instance
│    Leaking: YES (zzau↑ is leaking and View detached and has parent)
│    mContext instance of android.app.Application, not wrapping activity
│    View#mParent is set
│    View#mAttachInfo is null (view detached)
│    View.mWindowAttachCount = 1
│    ↓ FrameLayout.mParent
╰→ android.widget.FrameLayout instance
​     Leaking: YES (ObjectWatcher was watching this because com.google.android.libraries.maps.SupportMapFragment received Fragment#onDestroyView() callback (references to its views should be cleared to prevent leaks) and View.mContext references a destroyed activity)
​     

我寻找了其他堆叠溢出的答案，但没有找到任何适当的解决方案。

Answer 1

问题是，SupportMapFragment被合并到您的片段容器视图中，但是没有调用called。您需要手动调用它。

在OutputScreen类中，在onDestroy()方法下，需要调用以下命令：

mapFragment.onDestroy()  // call this in your activity's onDestroy