Modify Gradle project files with the Android Project Configuration Manager

The entry point for the Android Project Configuration Manager is the OnModifyAndroidProjectFiles method in the AndroidProjectFilesModifier interface. This means to use the Android Project Configuration Manager, first create a class that implements AndroidProjectFilesModifier and declares a body for OnModifyAndroidProjectFiles. The following code example shows how to do this.

using UnityEditor.Android;

public class ModifyProjectScript : AndroidProjectFilesModifier
{
    public override void OnModifyAndroidProjectFiles(AndroidProjectFiles projectFiles)
    {
    }
}

The AndroidProjectFiles parameter contains a set of classes that represent GradleAn Android build system that automates several build processes. This automation means that many common build errors are less likely to occur. More info
See in Glossary project files in C#. The following code example shows a simple use case that adds an attribute and sets a property value:

public override void OnModifyAndroidProjectFiles(AndroidProjectFiles projectFiles)
{
   // Adds an "android:debuggable=true" attribute to the <application> element in the Launcher Manifest.
   projectFiles.LauncherManifest.Manifest.Application.Attributes.Debuggable.Set(true);
  
   // Sets the proguardFiles property in the defaultConfig block.
   projectFiles.UnityLibraryBuildGradle.Android.DefaultConfig.ProguardFiles.Set(new []{"proguard.txt"});
}

Additional resources

Modify Gradle project files with Gradle template files

Modify Gradle project files with Android Studio

Unity Manual

Modify Gradle project files with the Android Project Configuration Manager

Additional resources