I am using Facebook login in android.
Code:
callbackManager = CallbackManager.Factory.create();
LoginButton loginButton = (LoginButt
In my case problem was wrong generated Key Hash which need to submit on facebook app page Solution found on this article https://developers.facebook.com/docs/facebook-login/android/advanced
Manually Check Key Hash - You can print out the key hash sent to Facebook and use that value in App Dashboard. Make this change to onCreate() in your main activity:
try
{
PackageInfo info = getPackageManager().getPackageInfo(
"com.facebook.samples.loginhowto",
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) {
}