Error Validating Access Token: The User Has Not Authorized Application. Facebook Sdk 4

Here is the case : If I previously granted read permissions to my application via LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList('email')); Then, when I n

Solution 1:

Just do something like:

@OverridepublicvoidonError(FacebookException error) {
    Timber.e(error, "Error during facebook login");
    AccessToken.setCurrentAccessToken(null);
    LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("email"))
}

Solution 2:

Calling AccessToken.refreshCurrentAccessTokenAsync() worked for me. I get the error in the implementation of FacebookCallback.onError(), where I call AccessToken.refreshCurrentAccessTokenAsync() which clears the access token in Facebook SDK.

Because this is an async call, I cannot call loginManager.logInWithReadPermissions() immediately; There is no callback, so I display an AlertDialog to the user and when the user clicks "OK", at that time I call loginManager.logInWithReadPermissions().

So user experience is not too bad, and it is acceptable for an edge case.

Solution 3:

To do a correct validation check the accesstoken if it is null or expired:

AccessTokenaccessToken= AccessToken.getCurrentAccessToken();
  booleanisLoggedIn= accessToken != null && !accessToken.isExpired();
     
  if (isLoggedIn) { 
      //Post Facebook.
  } else {
      manager.logIn(shareAct, Arrays.asList("public_profile"));
  }