Facebook SDK for Android - Example app won't work

Question

Okey, I\'ve done all the business, followed all the steps, but still can\'t get it to work. The simple Example app that comes with the Facebook SDK, is working on the emulator a

Answer 1

If the keytool command doesn't work for you, I found a way around that stuff: you can just reverse engineer which key to put as Key Hash in the Facebook Developer section. Within your Activity just print out the Key Hash by doing:

try {
   PackageInfo info = getPackageManager().getPackageInfo("[your package name, e.g. com.yourcompany.yourapp]", PackageManager.GET_SIGNATURES);
   for (Signature signature : info.signatures) {
        MessageDigest md = MessageDigest.getInstance("SHA");
        md.update(signature.toByteArray());
        Log.d("Hash Key:", Base64.encode(md.digest()));
   }
} catch (NameNotFoundException e) {

} catch (NoSuchAlgorithmException e) {

}

This worked for me. The MessageDigest class is included in the JDK. The Base64 class not. You can use this one for example.