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I was wondering, when creating new Activity classes and then overriding the onCreate() method, in eclipse I always get auto added: super.onCreate(). How does this happen? Is there a java keyword in the abstract or parent class that forces this?
I don't know if it is illegal not to call the super class, but I remember in some methods that I got a exception thrown for not doing this. Is this also built-in into java? Can you use some keyword to do that? Or how is it done?
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If you want the superclass constructor called with specific arguments, explicitly call the superclass constructor from the subclass constructor. The call to the superclass constructor must come before any other references to the object.
A subclass can override methods of its superclass, substituting its own implementation of the method for the superclass's implementation.
Subclass Constructors Invocation of a superclass constructor must be the first line in the subclass constructor. super(); or: super(parameter list);
Private methods of the super-class cannot be called. Only public and protected methods can be called by the super keyword. It is also used by class constructors to invoke constructors of its parent class. Super keyword are not used in static Method.
This is added in the support annotation library:
dependencies { compile 'com.android.support:support-annotations:22.2.0' } http://tools.android.com/tech-docs/support-annotations
@CallSuper
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