java.lang.NullPointerException:'void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
49
What is a NullPointerException, and how do I fix it?
20020
NullPointerException accessing views in onCreate()
85964
Android: ClassNotFoundException when passing serializable object to Activity
8793
Android and getting a view with id cast as a string
64332
avoiding null reference exceptions
108336
Nullable Object must have a value #2
92844
getOnClickListener() in Android views
101059
Android - android.os.NetworkOnMainThreadException
69771
NullPointerException when setting attribute?
128142
java.lang.NullPointerException at org.apache.jsp.foo_jsp._jspInit(foo_jsp.java:22)
38512
Unhandled event loop exception in plugin org.eclipse.ui
32065
Attempt to de-reference a null object: Trigger
73285
Null Pointer Exception in XMl Parsing
19797
when EditText is empty and click calculateButton, app crashes
146476
Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
144658
System.NullPointerException: Attempt to de-reference a null object ,sravn
73034
StringBuilder append() and null values