How To Create A Facebook Key Hash?

In the Facebook android tutorial we are told to use following code to create a key hash: keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | openssl s

Solution 1:

try

try {
PackageInfoinfo= getPackageManager().getPackageInfo("com.eatapp", PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
    MessageDigestmd= MessageDigest.getInstance("SHA");
    md.update(signature.toByteArray());
    Log.e("MY KEY HASH:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
} catch (NameNotFoundException e) {

} catch (NoSuchAlgorithmException e) {

}

in your main Activity :-) This is the only solution it works for me for Android SDK 3.0

Solution 2:

You can create this way

keytool -exportcert -alias androiddebugkey -keystore c:\Users\<your windows defaultuser>\.android\debug.keystore | openssl sha1 -binary| openssl base64

Enter keystore password: android

Solution 3:

/**
     * Generates the hash key used for Facebook console to register app. It can also be used for other sdks) Method copied from: https://developers.facebook.com/docs/android/getting-started/
     */publicstatic String printHashKey(Context ctx) {
        // Add code to print out the key hashtry {
            PackageInfoinfo= ctx.getPackageManager().getPackageInfo(ctx.getPackageName(), PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {
                MessageDigestmd= MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                return Base64.encodeToString(md.digest(), Base64.DEFAULT);
            }
        } catch (NameNotFoundException e) {
            return"SHA-1 generation: the key count not be generated: NameNotFoundException thrown";
        } catch (NoSuchAlgorithmException e) {
            return"SHA-1 generation: the key count not be generated: NoSuchAlgorithmException thrown";
        }

        return"SHA-1 generation: epic failed";
    }

Solution 4:

In eclipse, window -> preferences -> Android -> build -> default debug keystore, copy the path to replace the ~/.android/debug.keystore

Solution 5:

When having the error in the log, when trying to login to Facebook, look for something that looks like:

Invalid key hash. The key hash *** does not match any stored key hashes. Configure your app key hashes at http://developers.facebook.com/apps/565561836797777

where "***" is the key that you need to use.