Simple implementation of Eventbus

Eventbus is the most recent project to use, but also just a few simple features, but the feeling is quite powerful. Code Link: http://download.csdn.net/detail/qq_29774291/9629346

Eventbus is the guava event handling mechanism, an elegant implementation of the Observer pattern (production/consumer programming model) in design patterns. The main function is to substitute intent,handler,broadcast for passing messages between Fragment,activity,service and threads. The advantage is that the cost is small and the code is more elegant. and decoupling the sender and receiver.

A. Downloaded class library: Https://github.com/greenrobot/EventBus

Two. Basic use:

1. Register on the page where you want to receive the message:

1 eventbus.getdefault (). Register (this);

2. Send a message in the Send interface:

New Student (20, "Zhang San", "male"); Eventbus.getdefault (). Post (student);

3. Accept the information on the acceptance screen:

@Subscribe      Public void onmessagereviced (final  Student Message) {        // display a pop-up window        System.out.println ("Received message DDDX:" + message );         if NULL {            Showalertdialog (This, "name:" + message.getname () + "\ \ Age:" + message.getage () + "\ \ Gender:" +<
   
     C17>message                    . Getsex ());        }    }
   

4. Cancellation of registration:

        @Override    protectedvoid  OnDestroy () {        //  TODO auto-generated method Stub        Super. OnDestroy ();        Eventbus.getdefault (). Unregister (this);    }    

Main program code

1  Packagecom.item.jiejie.event;2 3 ImportDe.greenrobot.event.EventBus;4 ImportDe.greenrobot.event.Subscribe;5 ImportAndroid.os.Bundle;6 Importandroid.app.Activity;7 ImportAndroid.app.AlertDialog;8 ImportAndroid.content.Context;9 ImportAndroid.content.DialogInterface;Ten Importandroid.content.Intent; One ImportAndroid.view.View; A ImportAndroid.widget.Button; - ImportAndroid.widget.TextView; -  the  Public classMainactivityextendsActivity { -  -     PrivateTextView Tv_view; -     PrivateButton btn_to_finish; +  - @Override +     protected voidonCreate (Bundle savedinstancestate) { A         Super. OnCreate (savedinstancestate); at Setcontentview (r.layout.activity_main); - Setview (); -Eventbus.getdefault (). Register ( This); -     } -      - @Override in     protected voidOnDestroy () { -         //TODO auto-generated Method Stub to         Super. OnDestroy (); +Eventbus.getdefault (). Unregister ( This); -     } the     Private voidSetview () { *         //TODO auto-generated Method Stub $Tv_view =(TextView) Findviewbyid (r.id.tv_text);Panax NotoginsengBtn_to_finish =(Button) Findviewbyid (r.id.btn_to_one); -Btn_to_finish.setonclicklistener (NewView.onclicklistener () { the  + @Override A              Public voidOnClick (View arg0) { the                 //TODO auto-generated Method Stub +StartActivity (NewIntent (mainactivity. This, Oneactivity.class)); -             } $         }); $     } -     Private BooleanIsshow =false; - @Override the     protected voidOnStart () { -         //TODO auto-generated Method StubWuyi         Super. OnStart (); theIsshow =true; -     } Wu @Override -     protected voidOnStop () { About         //TODO auto-generated Method Stub $         Super. OnStop (); -Isshow =false; -     } - @Subscribe A      Public voidOnmessagereviced (FinalString Message) { + Tv_view.settext (Message); theSystem.out.println ("Received message DDD:" +Message); -     } $  the @Subscribe the      Public voidOnmessagereviced (FinalStudent Message) { the         //show a pop -up window theSystem.out.println ("Received message DDDX:" +Message); -         if(Message! =NULL){ inShowalertdialog ( This, "Name:" + message.getname () + "\ \ Age:" + message.getage () + "\ \ Sex:" +Message the . Getsex ()); the         } About     } the     Private voidShowalertdialog (FinalContext context,string String) { theAlertdialog.builder dialog =NewAlertdialog.builder (context); theDialog.settitle ("I am the title"); + dialog.setmessage (string); -Dialog.setpositivebutton ("OK",NewDialoginterface.onclicklistener () { the             Bayi @Override the              Public voidOnClick (Dialoginterface arg0,intarg1) { the                 //TODO auto-generated Method Stub -                  -             } the         }); theAlertdialog Mdialog =dialog.create (); the mdialog.show (); the     } -}

Simple implementation of Eventbus