AsyncTask always returning a NPE
49
What is a NullPointerException, and how do I fix it?
8808
Strange Java null behavior in Method Overloading
68296
Is it possible to catch exceptions thrown in a JavaScript async callback?
139395
com.sun.istack.SAXException2 : Instance ... is substituting "java.lang.Object", but ... is bound to an anonymous type
78586
Why doesn't "System.out.println" work in Android?
31537
Checking for null before event dispatching... thread safe?
10581
Avoiding NullPointerException in Java
57417
Android intent bundle always null?
80745
Using AsyncTask
85964
Android: ClassNotFoundException when passing serializable object to Activity
112032
how to use asyn/await with .net 4.0? differences between AsyncTargetingPack and Microsoft.Bcl.Async?
100347
Android Stack Exchange app keeps crashing when I check Achievements
58054
When is it OK to catch NullPointerException?
40175
How to ensure that async method finished work?
31180
How to return value from an asynchronous callback function?
96976
GoogleApiClient.isConnected() return always false
143012
Android AsyncTask for long running operations