Adaptive Admob Banner Ads Implementation

XML Code:- 

• Ad Container:

<LinearLayout
    android:id="@+id/adContainer"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintBottom_toTopOf="@+id/bottomNavigation"
    android:gravity="center_horizontal" />

.kt Code:-

• Top of onCreate:

private lateinit var adContainer: LinearLayout
private var adView: AdView? = null

• Inside onCreate:

// Initialize & Call Ad
adContainer = binding.adContainer
loadAdaptiveBanner()

• Ad Functions:

private fun loadAdaptiveBanner() {
    adView = AdView(this)
    val adUnitId = getString(R.string.admob_banner_ad_unit_id)

    adView?.adUnitId = adUnitId
    adContainer.removeAllViews()
    adContainer.addView(adView)

    val adSize = getAdSize()
    adView?.setAdSize(adSize)

    val adRequest = AdRequest.Builder().build()
    adView?.loadAd(adRequest)
}

private fun getAdSize(): AdSize {
    val displayMetrics = resources.displayMetrics
    val adWidth = (displayMetrics.widthPixels / displayMetrics.density).toInt()
    return AdSize.getCurrentOrientationAnchoredAdaptiveBannerAdSize(this, adWidth)
}

override fun onResume() {
    super.onResume()
    adView?.resume()
}

override fun onPause() {
    super.onPause()
    adView?.pause()
}

override fun onDestroy() {
    super.onDestroy()
    adView?.destroy()
    adView = null
}

• Test Ad Unit Id's:

<string name="admob_app_id">ca-app-pub-3940256099942544~3347511713</string>
<string name="admob_banner_ad_unit_id">ca-app-pub-3940256099942544/6300978111</string>
<string name="admob_native_ad_unit_id">ca-app-pub-3940256099942544/2247696110</string>
<string name="admob_interstitial_ad_unit_id">ca-app-pub-3940256099942544/1033173712</string>
<string name="admob_rewarded_ad_unit_id">ca-app-pub-3940256099942544/5224354917</string>
<string name="admob_app_open_ad_unit_id">ca-app-pub-3940256099942544/9257395921</string>

Manifest:-

• Top of application :

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="com.google.android.gms.permission.AD_ID"/>

• Inside application :

<meta-data
    android:name="com.google.android.gms.ads.APPLICATION_ID"
    android:value="@string/admob_app_id"/>