AsyncTask doesn't always call but when it does, it comes up null?
49
What is a NullPointerException, and how do I fix it?
31537
Checking for null before event dispatching... thread safe?
81565
getClass().getResource() always returning null
289
What is a NullReferenceException, and how do I fix it?
96843
What will happen when I call a member function on a NULL object pointer?
128704
Are all javascript callbacks asynchronous? If not, how do I know which are?
117611
Android Context.bindService always returns false and ServiceConnection object is never triggered
39032
Can't create handler inside thread that has not called Looper.prepare()
2116
IllegalArgumentException or NullPointerException for a null parameter?
131923
Optional parameters on delegates doesn't work properly
64200
Can Java's NullPointerException be changed to report on which variable was null?
11617
Why must wait() always be in synchronized block
119583
How to call a method after a delay in Android
45980
HttpClient.GetAsync(...) never returns when using await/async
58054
When is it OK to catch NullPointerException?
151208
How to manage startActivityForResult on Android?
124773
NullPointerException when calling service in onResume