What is the difference between an Android custom control and its three parent class construction methods

When you customize a control with Android, you typically need to override the parent class constructor. These three are enough to find the function exactly when to call?

Public view is called when the Java code creates the view, and if it is a view populated from XML, it will not call this
Public View (context context, AttributeSet attrs) This is called when the XML is created but no style is specified
Public View (context context, AttributeSet attrs, int defstyle) is called when XML is created and a style is specified

For a third function, here is a long blog: http://www.cnblogs.com/angeldevil/p/3479431.html

What is the difference between an Android custom control and its three parent class construction methods