Arquivo BuildConfig útil para utilização em bibliotecas aonde não tem como pegar as informações do projeto devido ao import. BuildConfig file useful for use in libraries where you can not get project information due to import.

BuildConfigHelper.kt

package br.com.grupocriar.swapandroid.utils

import android.content.Context
import java.lang.reflect.Field

object BuildConfigHelper {

    val FIELD_DEBUG = "DEBUG"
    val FIELD_APPLICATION_ID = "APPLICATION_ID"
    val FIELD_BUILD_TYPE = "BUILD_TYPE"
    val FIELD_FLAVOR = "FLAVOR"
    val FIELD_VERSION_CODE = "VERSION_CODE"
    val FIELD_VERSION_NAME = "VERSION_NAME"

    fun getDebug(context: Context): Boolean {
        val o = getBuildConfigValue(context, FIELD_DEBUG)
        return if (o != null && o is Boolean) {
            (o as Boolean?)!!
        } else {
            false
        }
    }

    fun getVersionCode(context: Context): Int {
        val o = getBuildConfigValue(context, FIELD_VERSION_CODE)
        return if (o != null && o is Int) {
            (o as Int?)!!
        } else {
            Integer.MIN_VALUE
        }
    }

    /**
     * Gets a field from the project's BuildConfig. This is useful when, for example, flavors
     * are used at the project level to set custom fields.
     *
     * @param context   Used to find the correct file
     * @param fieldName The name of the field-to-access
     * @return The value of the field, or `null` if the field is not found.
     */
    fun getBuildConfigValue(context: Context, fieldName: String): Any? {
        try {
            val clazz = Class.forName(context.packageName + ".BuildConfig")
            val field = clazz.getField(fieldName)
            return field.get(null)
        } catch (e: ClassNotFoundException) {
            e.printStackTrace()
        } catch (e: NoSuchFieldException) {
            e.printStackTrace()
        } catch (e: IllegalAccessException) {
            e.printStackTrace()
        }
        return null
    }
}