Key hash doesn't match while facebook login in android

Question

My app uses a simple facebook login. I have entered the keyhash in my app dashboard, key_hash section and I was able to login successfully. Now I have published the app and

Answer 1

Here is the C# version for the benefit of anyone trying to get the Xamarin sample to work.

    public  void showHashKey(Context context) 
    {
        try {
            PackageInfo info = context.PackageManager.GetPackageInfo("com.facebook.samples.hellofacebook", PackageInfoFlags.Signatures);
            foreach (Android.Content.PM.Signature signature in info.Signatures) {
                MessageDigest md = MessageDigest.GetInstance("SHA");
                md.Update(signature.ToByteArray());

                var sign = Base64.EncodeToString(md.Digest(), Base64Flags.Default);
                Log.Info("KeyHash:", sign);
            }
            Log..Info("KeyHash:", "****------------***");
        } catch (PackageManager.NameNotFoundException e) {
            e.PrintStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.PrintStackTrace();
        }
    }