关于Android反射操作的相关代码详解

1 class TestReflect {
2     private String writeTest() {
3         return "aabbcc";
4     }
5 }

 1         try {
 2             TestReflect test = new TestReflect();//实例化类对象
 3             Class clazz = test.getClass();//获取实例对象类加载器
 4             Method method = clazz.getDeclaredMethod("writeTest");//获取私有方法
 5             method.setAccessible(true);
 6             Object result = method.invoke(test, null);
 7             Log.d("TAG", "反射返回内容：" + result);
 8         } catch (NoSuchMethodException e) {
 9             e.printStackTrace();
10         } catch (IllegalAccessException e) {
11             e.printStackTrace();
12         } catch (InvocationTargetException e) {
13             e.printStackTrace();
14         }

1 //获取object实例，即AppInfo实例，这里会调用无参构造方法
2    　　 Class<?> clazz= Class.forName("com.xxx.xxx.bean.AppInfo");
3        Object obj = clazz.newInstance();

1 clazz.getDeclaredField()//获取私有字段
2 clazz.getDeclaredMethod()//获取私有方法
3 clazz.getMethod()//获取公开方法
4 clazz.getField()//获取公开字段

1 class TestReflect {
2     private String writeTest(String a) {
3         return "aabbcc" + a;
4     }
5 }

 1       try {
 2             TestReflect test = new TestReflect();//实例化类对象
 3             Class clazz = test.getClass();//获取实例对象类加载器
 4             Method method = clazz.getDeclaredMethod("writeTest",String.class);//获取私有方法
 5             method.setAccessible(true);
 6             Object result = method.invoke(test, "传递文本型参数");
 7             Log.d("TAG", "反射返回内容：" + result);
 8 
 9         } catch (NoSuchMethodException e) {
10             e.printStackTrace();
11         } catch (IllegalAccessException e) {
12             e.printStackTrace();
13         } catch (InvocationTargetException e) {
14             e.printStackTrace();
15         }