'int android.view.View.getVisibility()' on a null object reference
49
What is a NullPointerException, and how do I fix it?
132398
What is null in Java?
133310
Why isn't there a getContentView() method for Activity?
38780
Checking for null before ToString()
139712
ensure visible on android listview?
2116
IllegalArgumentException or NullPointerException for a null parameter?
110077
Is it good practice to NULL a pointer after deleting it?
98866
Null Pointer Exception on getGraphics()
8793
Android and getting a view with id cast as a string
96046
Static fields on a null reference in Java
80018
Accessing class members on a NULL pointer
68787
Why The constructor ArrayAdapter(new View.OnKeyListener(){}, int, String[]) is undefined
98080
Android: Cannot invoke toString() on the primitive type int
79477
Why is "null" present in C# and Java?
35590
How to fix NullPointerException in Java?
119799
Android: Issue during Arraylist declaration
146476
Java: Why aren't NullPointerExceptions called NullReferenceExceptions?