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Android 如何解决框架布局中的内存泄漏问题?_Android_Google Maps_Google Maps Android Api 2_Leakcanary - Fatal编程技术网

Android 如何解决框架布局中的内存泄漏问题?

Android 如何解决框架布局中的内存泄漏问题?,android,google-maps,google-maps-android-api-2,leakcanary,Android,Google Maps,Google Maps Android Api 2,Leakcanary,我在android应用程序中使用leakcanary,它检测到FrameLayout泄漏。但我找不到或解决不了这个问题 我怎样才能修补这个漏洞?参考我的泄漏报告。 框架布局泄漏 ┬─── │ GC Root: System class │ ├─ leakcanary.internal.InternalLeakCanary class │ Leaking: NO (MainActivity↓ is not leaking and a class is nev

我在android应用程序中使用leakcanary,它检测到FrameLayout泄漏。但我找不到或解决不了这个问题

我怎样才能修补这个漏洞?参考我的泄漏报告。 框架布局泄漏

 ┬───
    │ GC Root: System class
    │
    ├─ leakcanary.internal.InternalLeakCanary class
    │    Leaking: NO (MainActivity↓ is not leaking and a class is never leaking)
    │    ↓ static InternalLeakCanary.resumedActivity
    ├─ com.android.zigmaster.MainActivity instance
    │    Leaking: NO (MapViewFragment↓ is not leaking and Activity#mDestroyed
    │    is false)
    │    mApplication instance of com.android.zigmaster.MyApplication
    │    mBase instance of androidx.appcompat.view.ContextThemeWrapper
    │    ↓ ComponentActivity.mActivityResultRegistry
    ├─ androidx.activity.ComponentActivity$2 instance
    │    Leaking: NO (MapViewFragment↓ is not leaking)
    │    Anonymous subclass of androidx.activity.result.ActivityResultRegistry
    │    this$0 instance of com.android.zigmaster.MainActivity with mDestroyed =
    │    false
    │    ↓ ActivityResultRegistry.mKeyToCallback
    ├─ java.util.HashMap instance
    │    Leaking: NO (MapViewFragment↓ is not leaking)
    │    ↓ HashMap.table
    ├─ java.util.HashMap$HashMapEntry[] array
    │    Leaking: NO (MapViewFragment↓ is not leaking)
    │    ↓ HashMap$HashMapEntry[].[4]
    ├─ java.util.HashMap$HashMapEntry instance
    │    Leaking: NO (MapViewFragment↓ is not leaking)
    │    ↓ HashMap$HashMapEntry.value
    ├─ androidx.activity.result.ActivityResultRegistry$CallbackAndContract instance
    │    Leaking: NO (MapViewFragment↓ is not leaking)
    │    ↓ ActivityResultRegistry$CallbackAndContract.mCallback
    ├─ androidx.fragment.app.FragmentManager$10 instance
    │    Leaking: NO (MapViewFragment↓ is not leaking)
    │    Anonymous class implementing androidx.activity.result.
    │    ActivityResultCallback
    │    ↓ FragmentManager$10.this$0
    ├─ androidx.fragment.app.FragmentManagerImpl instance
    │    Leaking: NO (MapViewFragment↓ is not leaking)
    │    ↓ FragmentManager.mParent
    ├─ com.android.zigmaster.ui.trips.FragmentTripPlanner instance
    │    Leaking: NO (Fragment#mFragmentManager is not null)
    │    ↓ FragmentTripPlanner.mMap
    │                          ~~~~
    ├─ com.google.android.gms.maps.GoogleMap instance
    │    Leaking: UNKNOWN
    │    Retaining 765.4 kB in 10828 objects
    │    ↓ GoogleMap.zzg
    │                ~~~
    ├─ com.google.android.gms.maps.internal.zzg instance
    │    Leaking: UNKNOWN
    │    Retaining 142 B in 2 objects
    │    ↓ zza.zza
    │          ~~~
    ├─ com.google.maps.api.android.lib6.impl.bn instance
    │    Leaking: UNKNOWN
    │    Retaining 765.0 kB in 10821 objects
    │    A instance of com.android.zigmaster.MyApplication
    │    ↓ bn.w
    │         ~
    ├─ android.widget.FrameLayout instance
    │    Leaking: UNKNOWN
    │    Retaining 2.9 kB in 65 objects
    │    View not part of a window view hierarchy
    │    View.mAttachInfo is null (view detached)
    │    View.mWindowAttachCount = 1
    │    mContext instance of com.android.zigmaster.MyApplication
    │    ↓ View.mParent
    │           ~~~~~~~
    ╰→ android.widget.FrameLayout instance
    ​     Leaking: YES (ObjectWatcher was watching this because com.google.android.
    ​     gms.maps.SupportMapFragment received Fragment#onDestroyView() callback
    ​     (references to its views should be cleared to prevent leaks))
    ​     Retaining 1.9 kB in 48 objects
    ​     key = 265fafb3-b2a3-4462-a4e7-d5cc2afbc6fe
    ​     watchDurationMillis = 57439
    ​     retainedDurationMillis = 52422
    ​     View not part of a window view hierarchy
    ​     View.mAttachInfo is null (view detached)
    ​     View.mWindowAttachCount = 1
    ​     mContext instance of com.android.zigmaster.MainActivity with
    ​     mDestroyed = false
    
   
以下是我的xml代码: XML:

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ui.trips.FragmentTripPlanner">


    <androidx.fragment.app.FragmentContainerView
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import com.google.android.gms.maps.CameraUpdate
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng



class MapViewFragment : Fragment() {

    private lateinit var mMap: GoogleMap
    private var userLatitude     = 38.2500486
    private var userLongitude    = -85.7647484
    private lateinit var mapFragment : SupportMapFragment

    private var binding : MapViewFragmentBinding ?=null

    private fun zoomingLocation(): CameraUpdate {
        return CameraUpdateFactory.newLatLngZoom(LatLng(userLatitude, userLongitude), 14f)
    }

    private fun configActivityMaps(googleMap: GoogleMap): GoogleMap {
        // set map type
        googleMap.mapType = GoogleMap.MAP_TYPE_NORMAL
        // Enable / Disable zooming controls
        googleMap.uiSettings.isZoomControlsEnabled = false

        // Enable / Disable Compass icon
        googleMap.uiSettings.isCompassEnabled = true
        // Enable / Disable Rotate gesture
        googleMap.uiSettings.isRotateGesturesEnabled = true
        // Enable / Disable zooming functionality
        googleMap.uiSettings.isZoomGesturesEnabled = true

        googleMap.uiSettings.isScrollGesturesEnabled = true
        googleMap.uiSettings.isMapToolbarEnabled = true

        return googleMap
    }

    
    override fun onCreateView(
            inflater: LayoutInflater,
            container: ViewGroup?,
            savedInstanceState: Bundle?
    ): View {
        binding = MapViewFragmentBinding.inflate(inflater)

        mapFragment = (childFragmentManager.findFragmentById(R.map.id) as SupportMapFragment?)!!
        mapFragment.getMapAsync { googleMap ->
            mMap = configActivityMaps(googleMap)
            mMap.moveCamera(zoomingLocation())
        }

        return binding!!.root
    }

    override fun onDestroyView() {
        super.onDestroyView()
        
        mapFragment =null
        binding=null
    }
}

  • Build.VERSION.SDK_INT:25

  • 制造商:三星

  • 金丝雀版本:2.7

  • 统计:LruCache[maxSize=3000,命中率=5750,未命中率=80700,命中率=6%] 随机访问[字节=4089892,读取=80700,行程=6089221355,范围=18101017,大小=22 288421]

  • 堆转储原因:用户请求

  • 分析持续时间:29922毫秒

尝试:同一问题

导入androidx.fragment.app.fragment
导入android.os.Bundle
导入android.view.LayoutInflater
导入android.view.view
导入android.view.ViewGroup
导入com.google.android.gms.maps.CameraUpdateFactory
导入com.google.android.gms.maps.OnMapReadyCallback
导入com.google.android.gms.maps.SupportMapFragment
导入com.google.android.gms.maps.model.LatLng
导入com.google.android.gms.maps.model.MarkerOptions
类MapsFragment:Fragment(){
private val callback=OnMapReadyCallback{googleMap->
val sydney=LatLng(-34.0151.0)
googleMap.addMarker(MarkerOptions().position(sydney.title)(“悉尼的标记”))
谷歌地图。移动摄像机(CameraUpdateFactory。纽拉廷(悉尼))
}
override fun onCreateView(充气机:布局充气机,
容器:视图组?,
savedInstanceState:捆绑?:查看{
返回充气机。充气(R.layout.fragment_图,容器,假)
}
覆盖已创建的视图(视图:视图,保存状态:捆绑?){
super.onViewCreated(视图,savedInstanceState)
val mapFragment=childFragmentManager.findFragmentById(R.id.map)是否作为SupportMapFragment?
mapFragment?.getMapAsync(回调)
}
}

首先,移除
@suppressint(“RestrictedApi”)
并修复隐藏在那里的内容

然后尝试将
private lateinit var mMap:GoogleMap
设置为局部变量…
不需要保留,因为您将在MapReadyCallback上获得实例

最后尝试调用
super.onDestroyView()
,因为
FrameLayout
既不是层次结构的一部分,也不是附加的。。。并且附加计数为1,因此它以前必须已附加。您很有可能尝试处理已由
super.onDestroyView()
处理的内容,而整个覆盖可能毫无意义


我猜你必须看看这个android.widget.FrameLayout是什么(后来的API有一个布局检查器-不过在API 25上,仍然可以将渲染的布局转储到文件中)。

在某些情况下,内存泄漏是不可避免的,例如,在这种情况下,谷歌地图-你总是会有一个内存泄漏谷歌地图片段-这就是它的工作原理。不过,这比以前好多了——在2013年之前,谷歌地图覆盖了整个地图缓存,这太可怕了

不管怎样,这都是一个问题,至今仍未解决。如果泄漏发生在谷歌提供的库中,我建议不要麻烦。通常,它们都是已知的,如果它们是严重的-固定的,或者如果它们是轻微的-很高兴地被遗忘。

尝试使用而不是/。MapView扩展了FrameLayout,并针对不仅需要在设备屏幕上显示地图,还需要在设备屏幕上显示其他控件的情况进行定向,并针对现代平台进行设计,还可以以其他方式实现


此外,如果您只需要为用户显示地图,您可以尝试或。

onDestroyView
尝试通过使字段为空来分配
mapFragment=null
,并使用
WeakReference
作为mMap fieldmapFragment=null(不工作)的类型,请与我分享如何使用“WeakReference”这可能是:
WeakReference
,但我不认为可空性是问题所在。mapsFragment.onDestroy()-在我筛选RotateSame问题时仍然会重复泄漏,看起来谷歌已经确认这是一个bug。本期由八位开发者主演,因此您可能想就此发表评论,询问是否有人(包括谷歌)有解决问题的方法等待修复。已尝试使用局部变量、已移除受限注释和已移除onDestroyView-仍会发生内存泄漏
import androidx.fragment.app.Fragment
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.MarkerOptions

class MapsFragment : Fragment() {

    private val callback = OnMapReadyCallback { googleMap ->
        val sydney = LatLng(-34.0, 151.0)
        googleMap.addMarker(MarkerOptions().position(sydney).title("Marker in Sydney"))
        googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney))
    }

    override fun onCreateView(inflater: LayoutInflater,
                              container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_maps, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        val mapFragment = childFragmentManager.findFragmentById(R.id.map) as SupportMapFragment?
        mapFragment?.getMapAsync(callback)
    }
}

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ui.pref.MapsFragment" />