Apps for reflection in Android

1> Creating a Test instance

 Public classTest {Privatestring string; Private intAnint;  PublicTest () {System.out.println ("This is test.test ()"); }     PublicTest (String S,intanint) {         This. String =s;  This. Anint =Anint; }    Private voidPrintOut () {System.out.println ("Test.printout-azheng" + "string:" + string + "Anint:" +anint); }}

2> by reflection, calling the test class's parameter construction method and the defined output method

 Public classMainactivityextendsappcompatactivity {@Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Class<Test> C = Test.class; Test test=NULL; Constructor Constructor=NULL; Try {            //obtaining a method for constructing a parameterconstructor = C.getdeclaredconstructor (String.class,int.class); Test= (Test) constructor.newinstance ("Yes", 1000); //Get Methodmethod = C.getdeclaredmethod ("PrintOut"); Method.setaccessible (true);        Method.invoke (test); } Catch(nosuchmethodexception e) {e.printstacktrace (); } Catch(illegalaccessexception e) {e.printstacktrace (); } Catch(instantiationexception e) {e.printstacktrace (); } Catch(InvocationTargetException e) {e.printstacktrace (); }    }}

Reference:

Http://baike.xsoftlab.net/view/209.html#3_2

Apps for reflection in Android