Step 1: Get SDK files

Download the AAR files from
The ZIP file includes the following AAR files;

• AppnextAndroidSDKCore.aar - SDK core
• AppnextAndroidSDKAds.aar - Interstitial and fullscreen/rewarded ad units
• AppnextAndroidSDKBanners.aar - Banners ad unit
• AppnextAndroidSDKNativeAds.aar - Native ads ad unit

Step 2: Add AAR files to Your Project

Extract the ZIP file and add the relevant AAR files to your "libs" folder in your project;

• You must add the AppnextAndroidSDKCore.aar file (make sure to add it only once)

Step 3: Add the relevant AAR files to your project

• Add one or more AAR files according to your relevant ad unit integration
• All AAR files must be from the same version (download the latest ZIP file to be sure)

dependencies {
  implementation name:'AppnextAndroidSDKAds.aar', ext:'aar'
  implementation name:'AppnextAndroidSDKBanners.aar', ext:'aar'
  implementation name:'AppnextAndroidSDKNativeAds.aar', ext:'aar'
  implementation name:'AppnextAndroidSDKActions.aar', ext:'aar'
  implementation name:'AppnextAndroidSDKCore.aar', ext:'aar' // Mandatory
  implementation 'com.google.android.gms:play-services-ads:18.2.0' // Mandatory
}

example

adding the Interstitial and fullscreen/rewarded will be implemented following way:

dependencies {
  implementation name:'AppnextAndroidSDKAds.aar', ext:'aar' // Interstitial and fullscreen/rewarded
  implementation name:'AppnextAndroidSDKCore.aar', ext:'aar' // Mandatory
  implementation 'com.google.android.gms:play-services-ads-identifier:17.0.0' // Mandatory
}

Step 4: Update the ProGuard Configuration

-keep class com.appnext.** { *; }
-dontwarn com.appnext.**

Done !

Now when you integrated AppNext SDK with your app,
Go ahead and implement an ad unit !