Android app fails to run on a device

Question

I am trying to build an android app with Facebook login. The app runs successfully on the emulator. But every time I install and run the app on an Android device and tries to login I get the error as in the following screenshot: enter image description here

http://stackoverflow.com/q/20301025/235710 – Mohammad Adil Feb 13 '14 at 18:52 — Mohammad Adil, Feb 13 '14 at 18:52

score 0 · Accepted Answer · edited May 23 '17 at 10:25

Your Facebook application should have key hashes that are valid to the keystore you are using the following code:

  try {
        PackageInfo info = getPackageManager().getPackageInfo(
                "com.yourpackage.name",
                PackageManager.GET_SIGNATURES);
        for (Signature signature : info.signatures) {
            MessageDigest md = MessageDigest.getInstance("SHA");
            md.update(signature.toByteArray());
            Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
            }
    } catch (NameNotFoundException e) {

    } catch (NoSuchAlgorithmException e) {

    }

or follow this link instructions Facebook Android Generate Key Hash

Then add this generated key hash to the keyhashes in android settings in your Facebook application

Android app fails to run on a device

1 Answers1