Why does my app crash with java.lang.String java.lang.String.substring(int)on a null object" the first time I open it but works the second time?
49
What is a NullPointerException, and how do I fix it?
72675
I don't understand why this is causeing my program to crash?
88920
Is using NULL references OK?
18925
Why are my fields initialized to null or to the default value of zero when I've declared and initialized them in my class' constructor?
149666
Why can't a null-reference exception name the object that has a null reference?
139133
Why does this code crash at the places mentioned?
143664
setOnClickListener crashs my android app
38780
Checking for null before ToString()
134689
Setting an object to null vs Dispose()
115607
Why doesn't String switch statement support a null case?
87349
My application got crashed because of not initializing the view
78586
Why doesn't "System.out.println" work in Android?
37988
System.NullPointerException: Attempt to de-reference a null object:
82642
Execution of AfterInsert caused by: System.StringException: Invalid id: () - where have I gone wrong?
641
Which overload will get selected for null in Java?
23964
Why does Java have a "NullPointerException" when there are no pointers in Java?
55274
Java: Exception itself is null