奖励广告在 Android 中无法正常运行

Question

这是我的 MainActivity -

class MainActivity() : AppCompatActivity() {

    private var btn1: Button? = null
    private var mRewardedAd: RewardedAd? = null

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



        btn1 = findViewById<View>(R.id.button1) as Button

        btn1?.setOnClickListener {

            loadAd()
            showAd()

            if (mRewardedAd != null) {
                val intent: Intent = Intent(this, SecondActivity::class.java)
                startActivity(intent)
                Toast.makeText(this, " Ad completed", Toast.LENGTH_SHORT).show()
            }
        }
    }

    private fun showAd() {
        if (mRewardedAd != null) {
            mRewardedAd?.show(this, OnUserEarnedRewardListener() {
                fun onUserEarnedReward(rewardItem: RewardItem) {
                    var rewardAmount = rewardItem.getAmount()
                    var rewardType = rewardItem.getType()
                    Log.d(TAG, "User earned the reward.")
                    Toast.makeText(this, "User earned the reward.", Toast.LENGTH_SHORT).show()
                }
            })
        } else {
            Log.d(TAG, "The rewarded ad wasn't ready yet.")
            Toast.makeText(this, "The rewarded ad wasn't ready yet.", Toast.LENGTH_SHORT).show()
        }

    }


    private fun loadAd() {
        var adRequest = AdRequest.Builder().build()

        RewardedAd.load(
            this,
            "ca-app-pub-3940256099942544/5224354917",
            adRequest,
            object : RewardedAdLoadCallback() {
                override fun onAdFailedToLoad(adError: LoadAdError) {
                    Log.d(TAG, adError?.message)
                    mRewardedAd = null
                }

                override fun onAdLoaded(rewardedAd: RewardedAd) {
                    Log.d(TAG, "Ad was loaded.")
                    mRewardedAd = rewardedAd
                }
            })
    }
}

MainActivity.xml -

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="224dp"
        android:backgroundTint="#9C27B0"
        android:text="Button main Screen"
        android:textColor="@color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.589"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="MissingConstraints" />

</androidx.constraintlayout.widget.ConstraintLayout>

奖励广告并未加载所有内容。有时，当我按回来时，广告就来了。不知道它是如何工作的。我想当我按下 MainActivity 中的按钮时，它会在进入下一个 Activity 后显示奖励广告。请帮我解决这个问题。

我正在使用 Android Intent 转到 nextActivity。有时它会转到 nextActivity 而不显示广告。奖励广告并非每次都加载。现在我正在检查文字广告。

Answer 1

当用户点击按钮时，您同时调用 loadAd() 和 showAd()。

您需要在内存中有一个广告才能显示它。 您必须在初始化您的 MobileAds SDK 后立即调用 loadAd()，因此您的内存中始终有一个加载的广告，您可以稍后在单击按钮或任何其他事件时显示该广告。

从btn1?.setOnClickListener 中移除loadAd() 调用并将其移动到onCreate()，您还必须初始化MobileAds SDK

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

        MobileAds.initialize(this) {}
        loadAd()

        //here goes your remaining code
}

在showAd() 方法中，设置fullScreenContentCallback，在mRewarededAd 的null 检查之后，在用户观看奖励广告后加载新广告。

mRewardedAd?.fullScreenContentCallback = object : FullScreenContentCallback() {
    override fun onAdDismissedFullScreenContent() {
      Log.d(TAG, "Ad was dismissed.")
      // Don't forget to set the ad reference to null so you
      // don't show the ad a second time.
      mRewardedAd = null

      // Reload rewarded ad
      loadAd()
    }

    override fun onAdFailedToShowFullScreenContent(adError: AdError?) {
      Log.d(TAG, "Ad failed to show.")
      // Don't forget to set the ad reference to null so you
      // don't show the ad a second time.
      mRewardedAd = null
    }

    override fun onAdShowedFullScreenContent() {
      Log.d(TAG, "Ad showed fullscreen content.")
      // Called when ad is dismissed.
    }
  }