<Interstitial ad not showing using .setOnClickList...

# stackoverflow

[user]

Interstitial ad not showing using .setOnClickListener Method Kotlin
i am trying to show interstitial ad when user click Buttons on my Kotlin app but the ad never shows.
this is my Fragment layout when button exist "item_frag_installed_app.xml"


this is my AppInstalledAdapter.kt when .setOnClickListener method only exist.
private var interstitialAd: MaxInterstitialAd? = null

override fun updateView(dateItem: AppInfo) {
super.updateView(dateItem)
ImageLoader.Builder(mContext, AppedIconUrl(dateItem.packageName,...