Key hash for Android-Facebook app

Question

I\'m working on an Android app, in which I want to integrate a Facebook posting feature. I downloaded the Facebook-Android SDK, and I got the readme.md (text file) in there,

Answer 1

Kotlin code to get Hash key

 private fun logHashKey() {
    try {
        val info = getPackageManager().getPackageInfo("your.package.name", PackageManager.GET_SIGNING_CERTIFICATES);
        for (signature in info.signingInfo.signingCertificateHistory) {

            val md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            val something = Base64.getEncoder().encodeToString(md.digest());
            Log.e("hash key", something);
        }
    } catch (e1: PackageManager.NameNotFoundException) {
        Log.e("name not found", e1.toString());
    } catch (e: NoSuchAlgorithmException) {
        Log.e("no such an algorithm", e.toString());
    } catch (e: Exception) {
        Log.e("exception", e.toString());
    }
}

Please don't forgot to generate keys in Debug and Release environment as they change as per build setting.