Authentication error when integrating Facebook SDK 3.6 to Android

Question

I’m having difficulties to integrate Facebook SDK 3.6 to Android. When trying to log into the app, the following error appears:

Invalid Android Key Parameter

How to solve?

Answer 1

This error happens because the key that is trying to access the Facebook sdk is not registered on console of the application (Facebook).

For the login to work, you need to generate the hash of keystores of Keystore production.

A more detailed explanation can be found in this link (http://www.devmedia.com.br/integrando-aplicacoes-android-com-o-facebook/27567).

But a little advice: The keytool in Windows may present very boring flaws in the generation of this hash (speak this knowingly)! If you have problems to generate, you can use the following code:

try{ logger.debug("Checking signs");
    PackageInfo info = getPackageManager().getPackageInfo(this.getPackageName(), PackageManager.GET_SIGNATURES);
    for (Signature signature : info.signatures) {
        MessageDigest md = MessageDigest.getInstance("SHA");
        md.update(signature.toByteArray());
        logger.debug(Base64.encodeToString(md.digest(), Base64.DEFAULT));
    }
} catch (NameNotFoundException e) {
    e.printStackTrace();
    logger.debug(e.getMessage());
} catch (NoSuchAlgorithmException e) {
    e.printStackTrace();
    logger.debug(e.getMessage());
}