设置 AAR 构建名

android.libraryVariants.all { variant ->
    variant.outputs.each { output ->
        def outputFile = output.outputFile
        if (outputFile != null && outputFile.name.endsWith('.aar')) {
            def fileName = "Your aar package name"
            output.outputFile = new File(outputFile.parent, fileName)
        }
    }
}

Rebuild your project, you will find the aar package file at build/outputs/aar