Question

我是android编码的超级新手，请告诉我此内存泄漏是否足以使我担心。如果是这样，请提出我可以做些什么。

我正在尝试使用admob在我的android应用中显示奖励广告，但是实施了标准奖励广告之后。当我调查问题时发现我的应用开始出现性能问题，而RewardedAdCallback引用我的MainActivity导致内存泄漏。搜索三天后我完全迷路了，怎么解决？

这是我的MainActivity

package com.example.ads

import android.app.Activity
import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.view.View
import androidx.annotation.NonNull
import com.google.android.gms.ads.AdError
import com.google.android.gms.ads.AdRequest
import com.google.android.gms.ads.LoadAdError
import com.google.android.gms.ads.MobileAds
import com.google.android.gms.ads.rewarded.RewardItem
import com.google.android.gms.ads.rewarded.RewardedAd
import com.google.android.gms.ads.rewarded.RewardedAdCallback
import com.google.android.gms.ads.rewarded.RewardedAdLoadCallback

class MainActivity : AppCompatActivity() {
    lateinit var rewardedAd: RewardedAd

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        MobileAds.initialize(applicationContext)

        rewardedAd = RewardedAd(this,
                "ca-app-pub-3940256099942544/5224354917")
        val adLoadCallback = object: RewardedAdLoadCallback() {
            override fun onRewardedAdLoaded() {
                // Ad successfully loaded.
            }
            override fun onRewardedAdFailedToLoad(adError: LoadAdError) {
                // Ad failed to load.
            }
        }
        rewardedAd.loadAd(AdRequest.Builder().build(), adLoadCallback)
    }

    fun showads(view:View){
        if (rewardedAd.isLoaded) {
            val activityContext: Activity = this@MainActivity
            val adCallback = object : RewardedAdCallback() {
                override fun onRewardedAdOpened() {
                    // Ad opened.
                }

                override fun onRewardedAdClosed() {
                    // Ad closed.
                    rewardedAd = createAndLoadRewardedAd()
                }

                override fun onUserEarnedReward(@NonNull reward: RewardItem) {
                    // User earned reward.
                }

                override fun onRewardedAdFailedToShow(adError: AdError) {
                    // Ad failed to display.
                }
            }
            rewardedAd.show(activityContext, adCallback)
        } else {
            Log.d("TAG", "The rewarded ad wasn't loaded yet.")
        }
    }
    fun createAndLoadRewardedAd(): RewardedAd {
        val rewardedAd = RewardedAd(this, "ca-app-pub-3940256099942544/5224354917")
        val adLoadCallback = object: RewardedAdLoadCallback() {
            override fun onRewardedAdLoaded() {
                // Ad successfully loaded.
            }
            override fun onRewardedAdFailedToLoad(adError: LoadAdError) {
                // Ad failed to load.
            }
        }
        rewardedAd.loadAd(AdRequest.Builder().build(), adLoadCallback)
        return rewardedAd
    }
    fun l(view:View){
        val intent = Intent(this,MainActivity2::class.java)
        startActivity(intent)
    }
}

这是我的MainActivity2

package com.example.ads

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View

class MainActivity2 : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main2)
    }
    fun goToSecond(view: View){
        val intent = Intent(this,MainActivity::class.java)
        startActivity(intent)

    }

}

MainActivty有2个按钮，一个用于显示广告（onClick：showads（）），另一个用于启动第二个活动（onClick：goToSecond（））和 MainActivity2有一个按钮可以启动第一个活动

重新创建内存泄漏的步骤是：-

启动应用
在第一个活动中，按按钮进入第二个活动
在第二个活动中，按按钮进入第一个活动
现在在第一次活动时，按一下按钮即可显示奖励广告
当奖励广告结束并且您回到第一个活动时，请按返回按钮，现在泄漏金丝雀必须找到内存泄漏

下面是泄漏的金丝雀报告

我的问题是，为什么Google广告会导致内存泄漏

┬───
│ GC Root: Global variable in native code
│
├─ ns instance
│    Leaking: UNKNOWN
│    ↓ ns.a
│         ~
├─ com.google.android.gms.ads.internal.webview.x instance
│    Leaking: UNKNOWN
│    mContext instance of com.google.android.gms.ads.internal.webview.ax, not wrapping activity
│    View#mParent is null
│    View#mAttachInfo is null (view detached)
│    View.mWindowAttachCount = 1
│    ↓ x.a
│        ~
├─ com.google.android.gms.ads.internal.webview.ab instance
│    Leaking: YES (View detached and has parent)
│    mContext instance of com.google.android.gms.ads.internal.webview.ax, not wrapping activity
│    View#mParent is set
│    View#mAttachInfo is null (view detached)
│    View.mWindowAttachCount = 1
│    ↓ ab.mListenerInfo
├─ android.view.View$ListenerInfo instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ View$ListenerInfo.mOnClickListener
├─ com.google.android.gms.ads.nonagon.ad.webview.f instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ f.a
├─ com.google.android.gms.ads.nonagon.ad.webview.l instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ l.d
├─ com.google.android.gms.ads.nonagon.ad.event.cz instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ cz.b
├─ java.util.HashMap instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ HashMap.table
├─ java.util.HashMap$Node[] array
│    Leaking: YES (ab↑ is leaking)
│    ↓ HashMap$Node[].[2]
├─ java.util.HashMap$Node instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ HashMap$Node.key
├─ com.google.android.gms.ads.nonagon.ad.event.cd instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ cd.g
├─ com.google.android.gms.ads.nonagon.slot.rewarded.u instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ u.c
├─ java.util.concurrent.atomic.AtomicReference instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ AtomicReference.value
├─ com.google.android.gms.ads.internal.rewarded.client.f instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ f.a
├─ com.google.android.gms.internal.ads.zzauy instance
│    Leaking: YES (ab↑ is leaking)
│    ↓ zzauy.zzdvi
├─ com.example.logicpuzzle.MainActivity$giveHint$adCallback$1 instance
│    Leaking: YES (ab↑ is leaking)
│    Anonymous subclass of com.google.android.gms.ads.rewarded.RewardedAdCallback
│    ↓ MainActivity$giveHint$adCallback$1.this$0
╰→ com.example.logicpuzzle.MainActivity instance
     Leaking: YES (ObjectWatcher was watching this because com.example.logicpuzzle.MainActivity received Activity#onDestroy() callback and Activity#mDestroyed is true)
     key = ab343657-b3f0-47fc-a4cf-281413e4765d
     watchDurationMillis = 5652
     retainedDurationMillis = 650

METADATA

Build.VERSION.SDK_INT: 29
Build.MANUFACTURER: samsung
LeakCanary version: 2.4
App process name: com.example.app
Analysis duration: 18616

奖励广告内存泄漏广告

0 个答案: