Invalid key hash after build to apk and how to solve this for many device?

Question

I have built a \"Log In with Facebook\" button for my app, it\'s working normally in the virtual device, but after I built my app to apk and test it on the real device, ther

Answer 1

We have to add total three key hashes at Facebook developer.

1.using package manager in android app.

  try {
                PackageInfo info = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);
                for (Signature signature : info.signatures) {
                    MessageDigest md = MessageDigest.getInstance("SHA");
                    md.update(signature.toByteArray());
                    String sign = Base64.encodeToString(md.digest(), Base64.DEFAULT);
                    Log.e("MY KEY HASH:", sign);
                    //textInstructionsOrLink = (TextView)findViewById(R.id.textstring);
                    //textInstructionsOrLink.setText(sign);
                    Toast.makeText(getApplicationContext(), sign, Toast.LENGTH_LONG).show();
                }
            } catch (PackageManager.NameNotFoundException e) {
                Log.d("nope", "nope");
            } catch (NoSuchAlgorithmException e) {
            }

2.Debug key using command line

keytool -exportcert -alias androiddebugkey -keystore C:\Users\username\.android\debug.keystore | C:\openssl-0.9.8k_X64\bin\openssl sha1 -binary | C:\openssl-0.9.8k_X64\bin\openssl base64

3.Release key using command line

keytool -exportcert -alias app_alias -keystore C:\Users\usename\app_keysrore.jks | C:\openssl-0.9.8k_X64\bin\openssl sha1 -binary | C:\openssl-0.9.8k_X64\bin\openssl base64

please add this all key hashes and check again.

Note :

1. You have to generate all these keys on the same machine which is used to sign an APK using key store.
2. We have to add two debug key hashes because key produced by package manager and command line are different.