Introduction to the use of Android callback functions

1---Defining callback functions

Public interface Girdmenustatelistener {
void Onsuccess ();
void OnError ();
}

//2---Use local declarations and invoke callback functions to pass results
public class Girdmenuviewpresenter
{
Private Girdmenustatelistener listener;

public void Setlistener (Girdmenustatelistener listener) {
This.listener = listener;
}

public void LoadData (final Girdmenuview Gridmenuview) {//used in custom methods

if (listener! = NULL)
{
Listener.onsuccess ();
}
}
}

//3----Receive callback function results
public class Presenter Extend Activity implements Girdmenustatelistener {

Private Girdmenustatelistener listener;

private void OnCreate ()
{

Listener=this;

Girdmenuviewpresenter.setlistener (listener);
}

@Override
void Onsuccess () {
}
@Override
void OnError () {
}

}

Note: You can refer to the system control's own click and related events, all of which are written in the callback function.

Introduction to the use of Android callback functions