How to get MimeType and file extension from byte array on Android

FileInfoDetector.kt

import android.webkit.MimeTypeMap
import java.net.URLConnection

fun getFileInfo(bytes: ByteArray): Pair<String?, String?> {
    val mime = URLConnection.guessContentTypeFromStream(bytes.inputStream())
    val extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime)
    return mime to extension
}