Attempt to invoke virtual method 'void androidx.appcompat.widget.Toolbar.setNavigationIcon(android.graphics.drawable.Drawable)' on a null object
49
What is a NullPointerException, and how do I fix it?
39440
Android app crashes when clicking on the loading icon in notification pane
134010
Can Visual Studio tell me which reference threw a NullReferenceException?
85150
Android Navigation Drawer Open On Activity Create
74966
How to add Action Bar from support library into PreferenceActivity?
73120
Nullpointerexception when trying to send data from activity to class
88384
NoSuchMethodError error for getActionBar() (API-8)
155627
Keyword 'this' (Me) is not available calling the base constructor
68426
eclipse can't find android.support.v4.widget.SwipeRefreshLayout
103797
Android:android.view.ViewRoot$CalledFromWrongThreadException - How to solve the problem?
138775
Map not loading when using getLegend and showing error for getView()
97325
DialogFragment causing nullpointer crash
8950
how to setImage to null in android when the xml has src not null?
30969
Error: Declaration of MyClass::start_lvl() should be compatible with that of Walker_Nav_Menu::start_lvl()
144423
"No enclosing instance of type" error while calling method from another class in Android
124773
NullPointerException when calling service in onResume
113741
Using onClick attribute in layout xml causes a NoSuchMethodException in Android dialogs