Android反射出一个类中的其他类对象并调用其对应方法

MainActivity如下:

package cn.testreflect;import java.lang.reflect.Field;import java.lang.reflect.Method;import android.os.Bundle;import android.app.Activity;/** * Demo描述: * 在一个类中有另外一个类的对象 * 比如此处的Worker类中有一个Student类的对象: * private Student mStudent; *  * 目前需求: * 我们需要反射出Worker类中的 private Student mStudent * 并且使用该对象调用其对应的方法 */public class MainActivity extends Activity {private Field mStudentField;private Object mStudentObject;private Class mStudentClass;private Method mStudentShowMethod;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);init();}    private void init(){    try {        String workerClassName="cn.testreflect.Worker";        Class workerClass=Class.forName(workerClassName);                //得到Worker类中的mStudent字段        mStudentField=workerClass.getDeclaredField("mStudent");        mStudentField.setAccessible(true);        //实例化mStudent对象        mStudentObject=mStudentField.get(new Worker());        //得到mStudent对象对应类的Class        mStudentClass = Class.forName(mStudentObject.getClass().getName());        //反射出该Class类中的show()方法        mStudentShowMethod = mStudentClass.getDeclaredMethod("show");//取消访问私有方法的合法性检查         mStudentShowMethod.setAccessible(true);//调用show()方法        mStudentShowMethod.invoke(mStudentObject);                } catch (Exception e) {System.out.println(e.toString());}        }}

Worker如下:

package cn.testreflect;public class Worker {    private int age;    private String name;    private Student mStudent;    public Worker() {super();mStudent=new Student("I am a student", 9527);System.out.println("---> public Worker(){ }");}public Worker(int age, String name) {super();this.age = age;this.name = name;mStudent=new Student("I am a student", 9527);System.out.println("---> public Worker(int age, String name){ }");}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}@Overridepublic String toString() {return "Worker [age=" + age + ", name=" + name + "]";}public void printMessage(String name,int age,int salary){System.out.println("name="+name+",age="+age+",salary="+salary);}    }

Student如下:

package cn.testreflect;public class Student {private String name;private int age;public Student() {super();}public Student(String name, int age) {super();this.name = name;this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}@Overridepublic String toString() {return "Student [name=" + name + ", age=" + age + "]";}public void show(){System.out.println("-----> call method show()");}}

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Android中Java反射技术的使用"         android:layout_centerInParent="true"/></RelativeLayout>