。。。 Event Registration method of four ...

By mainactivity.java This class to implement the Onclicklistener interface:

thereby implementing the OnClick () method:

Gets the value of the control in the OnCreate () method and passes the event object (this) as a parameter to the registration event:

This is the object of the current class, Because the current class Mainactivity.java it implements the Onclicklistener interface, and the object we want to pass in is the object that implements the Onclicklistener interface, so the object passed in is Mainactivity, which is the object of the current class, which is this , this method in the work of more than!!!

。。。 Event Registration method of four ...