Key hash doesn't match while facebook login in android

Question

My app uses a simple facebook login. I have entered the keyhash in my app dashboard, key_hash section and I was able to login successfully. Now I have published the app and

Answer 1

You can generate a hash key through coding, you simply do one thing. Paste this code in main class (first class) then run the app and check the logcat where you will find the hash key.

One more thing, replace this package name "com.example.creeper" with your package name:

try{
        PackageInfo info = getPackageManager().getPackageInfo(
                "com.example.creeper", 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) {

}