Android：即使注销后ParseUser.getCurrentUser（）仍返回空对象

Question

In my Android code i am checking the condition on parse current user. if user is logged in them some action is performing and if not other action is performing. but when i am checking the condition even after user is logged out the ParseUser.getCurrentUser() is returning object, when i am trying to access data via parseCurrentUserObject the app is crashing, getting either NullpointerException or IllegalStateException.

i also gone through the link Parse for Android : ParseUser.logOut() doesn't log user out but din't workout for me.

code is -

`

ParseUser.logOut();
    if (ParseUser.getCurrentUser() != null) {
          Log.d("userType: ", ParseUser.getCurrentUser().getString("userType")
                            .toString());
          tabSettingForPrivateUser(rootView);
    } else {
          tabSettingForPublicUser(rootView);
    }

`

app is crashing at log message where i am trying to access data from object:

Log.d("userType: ", ParseUser.getCurrentUser().getString("userType").toString());

LogCat error message at this line -

08-15 17:58:05.250: E/AndroidRuntime(1220): Caused by: java.lang.NullPointerException

How to deal with this problem ?

Answer 1

The documentation very clearly says:

public static void logOut()

Logs out the currently logged in user session. This will remove the session from disk, log out of linked services, and future calls to ParseUser.getCurrentUser() will return null.

If the method call to ParseUser.getCurrentUser() does not behave as expected, then this is a bug in the API.

Have you tried using the debugger and setting a breakpoint to see what variables are null when your app crashes? Are you sure that the String you are getting isn't null?

Also, you are using a key to access the value in the ParseObject . It is definitely a good idea to keep the keys centralized in an interface . Makes debugging a lot easier and the code more maintainable. Writing the raw string value for the key is definitely a recipe for disaster.