Convert dp to px and px to dp in Kotlin for Android

MetricsUtil.kt

import android.content.Context
import android.content.res.Resources
import android.util.DisplayMetrics

/**
 * Provides utilities for metrics.
 *
 * Original at:
 * @see <a href="https://stackoverflow.com/a/9563438/8877070">stack overflow answer</a>
 *
 * @author kevin
 */
object MetricsUtil {

    /**
     * This method converts dp unit to equivalent pixels, depending on device density.
     * @param dp A value in dp (density independent pixels) unit. Which we need to convert into pixels
     * @param context Context to get resources and device specific display metrics. If you don't have
     * access to Context, just pass null.
     * @return A float value to represent px equivalent to dp depending on device density
     */
    fun convertDpToPixel(dp: Float, context: Context?): Float {
        return if (context != null) {
            val resources = context.resources
            val metrics = resources.displayMetrics
            dp * (metrics.densityDpi.toFloat() / DisplayMetrics.DENSITY_DEFAULT)
        } else {
            val metrics = Resources.getSystem().displayMetrics
            dp * (metrics.densityDpi.toFloat() / DisplayMetrics.DENSITY_DEFAULT)
        }
    }

    /**
     * This method converts device specific pixels to density independent pixels.
     * @param px A value in px (pixels) unit. Which we need to convert into db
     * @param context Context to get resources and device specific display metrics. If you don't have
     * access to Context, just pass null.
     * @return A float value to represent dp equivalent to px value
     */
    fun convertPixelsToDp(px: Float, context: Context?): Float {
        return if (context != null) {
            val resources = context.resources
            val metrics = resources.displayMetrics
            px / (metrics.densityDpi.toFloat() / DisplayMetrics.DENSITY_DEFAULT)
        } else {
            val metrics = Resources.getSystem().displayMetrics
            px / (metrics.densityDpi.toFloat() / DisplayMetrics.DENSITY_DEFAULT)
        }
    }
}