Android xutils FRAME (ii) viewutils

frame address: https://github.com/wyouflf/xUtilsfunction:

• UI binding and event binding can be done in a fully annotated manner.
• No need for Findviewbyid and Setclicklistener.

UI bindings:

@ContentView (r.layout. View_acti )//setcontentview annotations above the activity statement

@ViewInject(r.id. lv_test )// Reflection View annotations on a view declaration

@ResInject (id=r.string. app_name, Type=restype. String) //Resource Reflection ResType defines some of the resource types under Res/values

@PreferenceInject ("key")//annotation on a Preference component value for its key

Viewutils.inject (activity);//through reflection, find the corresponding view, and initialize

Event Bindings

@OnClick (r.id. Btn_test)//Bind a custom method to a view event

The package com.lidroid.xutils.view.annotation, which defines some common events, has a characteristic that there is only one internal implementation method

Process Analysis for event binding and execution

        @ViewInject (r.id.btn_test) private Button Mbutton; @Overrideprotected void OnCreate (Bundle savedinstancestate) {Supe R.oncreate (savedinstancestate); Viewutils.inject (this); Mbutton.settext (label); Method testbuttonclickmethod;try {testbuttonclickmethod = This.getclass (). GetMethod ("Testbuttonclick", View.class); Myonclick OnClick = testbuttonclickmethod.getannotation (Myonclick.class);        Myeventbase eventbase = Onclick.annotationtype (). Getannotation (Myeventbase.class); class<?> Listenertype = Eventbase.mlistenertype ();//view.onclicklistener.class String listenerSetter = EventB Ase.mlistenersetter ();//setonclicklistener String methodName = Eventbase.mmethodname ();//onclick MyD        Ynamichandler Dynamichandler = new Mydynamichandler (viewactivity.this); Dynamichandler.addmethod (MethodName, Testbuttonclickmethod);//Add the actual method to be called to the handler inside the map set Object listener = Pro      Xy.newproxyinstance (//Dynamic Agent Listenertype.getclassloader (),          New Class<?>[]{listenertype}, Dynamichandler); Method Seteventlistenermethod = Mbutton.getclass (). GetMethod (Listenersetter, listenertype);//         Setonclicklistener-method/* * onCreate () directly executed: * The first call here is: Mbutton.setonclicklistener (listener); * Listener into proxy object * Note: Dynamichandler's Invoke * * Touch: * dispatchtouchevent After Action-down and action-up, the onclick-event *onclicklistener that triggered the view has been set to the proxy object listener the * will call listener corresponding processor Dynami Chandler.invoke () *invoke: Final Execution Testbuttonclick Method * */Seteventlistenermethod.invoke (Mbutto         n, listener);        } catch (Exception e) {e.printstacktrace ();} } @MyOnClick (r.id.btn_test) public void Testbuttonclick (View v) {logutil.print ("clicked Button");} @Target (Elementtype.annotation_type) @Retention (retentionpolicy.runtime) public @interface myeventbase {class<?    > Mlistenertype (); String MlistenersettER (); String mmethodname ();} @Target (Elementtype.method) @Retention (retentionpolicy.runtime) @MyEventBase (Mlistenertype = View.OnClickListener.class, Mlistenersetter = "Setonclicklistener", Mmethodname = "OnClick") private static @ Interface Myonclick {int[] value (); int[] ParentID () default 0;} public class Mydynamichandler implements Invocationhandler {private weakreference<object> handlerref;private Final hashmap<string, method> methodmap = new hashmap<string, method> (1);p ublic Mydynamichandler (Object Handler) {this.handlerref = new weakreference<object> (handler);} public void Addmethod (String name, method method) {Methodmap.put (name, method);} Public Object GetHandler () {return handlerref.get ();} public void SetHandler (Object handler) {this.handlerref = new weakreference<object> (handler);} @Overridepublic object Invoke (Object proxy, Method method, object[] args) throws Throwable {Object handler = Handlerref.get ();//viewactivityif (handleR! = null) {String methodName = Method.getname (); System.out.println ("Invocationhandler.invoke--methodname:" + methodName); method = Methodmap.get (MethodName); if ( Method! = null) {return Method.invoke (handler, args);}} return null;}} @Overridepublic boolean dispatchtouchevent (motionevent ev) {System.out.println ("dispatch"); return Super.dispatchtouchevent (EV);}

Similarly, other events will bind you to the methods and corresponding events that use the event annotations in the form of dynamic proxies as above.

Android xutils FRAME (ii) viewutils