I'm working on converting my Kotlin App to Admob 20.1.0. Running into a problem integrating Rewarded Ads.

The problem is onUserEarnedReward is never called. I currently have no way of rewarding the user with the content they unlocked. My code below is placed in an onClickListener within an AppCompatActivity()

if (mRewardedAd != null) {     mRewardedAd?.show(this, OnUserEarnedRewardListener { // Redundant SAM-constructor         fun onUserEarnedReward(rewardItem: RewardItem) { // Function "onUserEarnedReward" is never used                          val rewardAmount = rewardItem.amount             val rewardType = rewardItem.type             println("======================= TYPE -  $rewardType /// AMOUNT - $rewardAmount")             // This never gets called.         }     }) } else {     println("=======================The rewarded ad wasn't ready yet.") }

My imports:

import com.google.android.gms.ads.* import com.google.android.gms.ads.rewarded.RewardItem import com.google.android.gms.ads.rewarded.RewardedAd import com.google.android.gms.ads.rewarded.RewardedAdLoadCallback import com.google.android.gms.ads.OnUserEarnedRewardListener

Why am I getting Redundant SAM-constructor and Function "onUserEarnedReward" is never used ?

Tag:google-ads-api, admob, android, kotlin

4 comments.

  1. Nitin Jain

    The reason is you are creating a function in High Order function and not invoking the function. Please try with below code. it will work

    mRewardedAd?.show(this, OnUserEarnedRewardListener { rewardItem -> val rewardAmount = rewardItem.amount val rewardType = rewardItem.type println("======================= TYPE - $rewardType /// AMOUNT - $rewardAmount") }

    For your better understanding about high order function below code is also work

    mRewardedAd?.show(this, OnUserEarnedRewardListener { fun onUserEarnedReward(rewardItem: RewardItem) { val rewardAmount = rewardItem.amount val rewardType = rewardItem.type println("======================= TYPE - $rewardType /// AMOUNT - $rewardAmount") } onUserEarnedReward(it) })
    Reply
    1. Vinesh Chauhan

      Can you Explain What exactly diffrence between your snippet code and Joe's snippet code.?

      Reply
    2. Nitin Jain

      Joe's snippet is a high order function. and In kotlin you can define function inside function, so joe override the function inside the function,Please check above the second snippet if you call the function it will work.

      Reply
  2. Ismail Osunlana

    OnUserEarnedRewardListener should be an interface object that overrides onUserEarnedReward(). Change your code to this

    if (mRewardedAd != null) { mRewardedAd?.show(this, object: OnUserEarnedRewardListener { override fun onUserEarnedReward(rewardItem: RewardItem) { // Function "onUserEarnedReward" is never used val rewardAmount = rewardItem.amount val rewardType = rewardItem.type println("======================= TYPE - $rewardType /// AMOUNT - $rewardAmount") // This never gets called. } }) } else { println("=======================The rewarded ad wasn't ready yet.")

    }

    Reply

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