@ContentView(value = R.layout.activity_main) 
public class MainActivity extends BaseActivity 
{ 
 @ViewInject(R.id.id_btn) 
 private Button mBtn1; 
 @ViewInject(R.id.id_btn02) 
 private Button mBtn2; 

package com.zhy.ioc.view.annotation; 
 
import java.lang.annotation.ElementType; 
import java.lang.annotation.Retention; 
import java.lang.annotation.RetentionPolicy; 
import java.lang.annotation.Target; 
 
@Target(ElementType.TYPE) 
@Retention(RetentionPolicy.RUNTIME) 
public @interface ContentView 
{ 
 int value(); 
} 

 @ContentView(value = R.layout.activity_main) 
public class MainActivity 

 
package com.zhy.ioc.view.annotation; 
 
import java.lang.annotation.ElementType; 
import java.lang.annotation.Retention; 
import java.lang.annotation.RetentionPolicy; 
import java.lang.annotation.Target; 
 
@Target(ElementType.FIELD) 
@Retention(RetentionPolicy.RUNTIME) 
public @interface ViewInject 
{ 
 int value(); 
} 

@ViewInject(R.id.id_btn) 
 private Button mBtn1; 

public enum ElementType { 
 /** 
  * Class, interface or enum declaration. 
  */ 
 TYPE, 
 /** 
  * Field declaration. 
  */ 
 FIELD, 
 /** 
  * Method declaration. 
  */ 
 METHOD, 
 /** 
  * Parameter declaration. 
  */ 
 PARAMETER, 
 /** 
  * Constructor declaration. 
  */ 
 CONSTRUCTOR, 
 /** 
  * Local variable declaration. 
  */ 
 LOCAL_VARIABLE, 
 /** 
  * Annotation type declaration. 
  */ 
 ANNOTATION_TYPE, 
 /** 
  * Package declaration. 
  */ 
 PACKAGE 
} 

public enum RetentionPolicy { 
 /** 
  * Annotation is only available in the source code. 
  */ 
 SOURCE, 
 /** 
  * Annotation is available in the source code and in the class file, but not 
  * at runtime. This is the default policy. 
  */ 
 CLASS, 
 /** 
  * Annotation is available in the source code, the class file and is 
  * available at runtime. 
  */ 
 RUNTIME 
} 

package com.zhy.zhy_xutils_test; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.Toast; 
 
import com.zhy.ioc.view.ViewInjectUtils; 
import com.zhy.ioc.view.annotation.ContentView; 
import com.zhy.ioc.view.annotation.ViewInject; 
 
@ContentView(value = R.layout.activity_main) 
public class MainActivity extends Activity implements OnClickListener 
{ 
 @ViewInject(R.id.id_btn) 
 private Button mBtn1; 
 @ViewInject(R.id.id_btn02) 
 private Button mBtn2; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) 
 { 
  super.onCreate(savedInstanceState); 
   
  ViewInjectUtils.inject(this); 
 
  mBtn1.setOnClickListener(this); 
  mBtn2.setOnClickListener(this); 
 } 
 
 @Override 
 public void onClick(View v) 
 { 
  switch (v.getId()) 
  { 
  case R.id.id_btn: 
   Toast.makeText(MainActivity.this, "Why do you click me ?", 
     Toast.LENGTH_SHORT).show(); 
   break; 
 
  case R.id.id_btn02: 
   Toast.makeText(MainActivity.this, "I am sleeping !!!", 
     Toast.LENGTH_SHORT).show(); 
   break; 
  } 
 } 
 
} 

/** 
  * 注入主布局文件 
  * 
  * @param activity 
  */ 
 private static void injectContentView(Activity activity) 
 { 
  Class<? extends Activity> clazz = activity.getClass(); 
  // 查询类上是否存在ContentView注解 
  ContentView contentView = clazz.getAnnotation(ContentView.class); 
  if (contentView != null)// 存在 
  { 
   int contentViewLayoutId = contentView.value(); 
   try 
   { 
    Method method = clazz.getMethod(METHOD_SET_CONTENTVIEW, 
      int.class); 
    method.setAccessible(true); 
    method.invoke(activity, contentViewLayoutId); 
   } catch (Exception e) 
   { 
    e.printStackTrace(); 
   } 
  } 
 } 

private static final String METHOD_SET_CONTENTVIEW = "setContentView"; 

private static final String METHOD_FIND_VIEW_BY_ID = "findViewById"; 
 /** 
  * 注入所有的控件 
  * 
  * @param activity 
  */ 
 private static void injectViews(Activity activity) 
 { 
  Class<? extends Activity> clazz = activity.getClass(); 
  Field[] fields = clazz.getDeclaredFields(); 
  // 遍历所有成员变量 
  for (Field field : fields) 
  { 
    
   ViewInject viewInjectAnnotation = field 
     .getAnnotation(ViewInject.class); 
   if (viewInjectAnnotation != null) 
   { 
    int viewId = viewInjectAnnotation.value(); 
    if (viewId != -1) 
    { 
     Log.e("TAG", viewId+""); 
     // 初始化View 
     try 
     { 
      Method method = clazz.getMethod(METHOD_FIND_VIEW_BY_ID, 
        int.class); 
      Object resView = method.invoke(activity, viewId); 
      field.setAccessible(true); 
      field.set(activity, resView); 
     } catch (Exception e) 
     { 
      e.printStackTrace(); 
     } 
 
    } 
   } 
 
  } 
 
 } 

 public static void inject(Activity activity) 
 { 
   
  injectContentView(activity); 
  injectViews(activity); 
   
 } 

package com.zhy.zhy_xutils_test; 
 
import android.view.View; 
import android.widget.Button; 
import android.widget.Toast; 
 
import com.zhy.ioc.view.annotation.ContentView; 
import com.zhy.ioc.view.annotation.OnClick; 
import com.zhy.ioc.view.annotation.ViewInject; 
 
@ContentView(value = R.layout.activity_main) 
public class MainActivity extends BaseActivity 
{ 
 @ViewInject(R.id.id_btn) 
 private Button mBtn1; 
 @ViewInject(R.id.id_btn02) 
 private Button mBtn2; 
 
 @OnClick({ R.id.id_btn, R.id.id_btn02 }) 
 public void clickBtnInvoked(View view) 
 { 
  switch (view.getId()) 
  { 
  case R.id.id_btn: 
   Toast.makeText(this, "Inject Btn01 !", Toast.LENGTH_SHORT).show(); 
   break; 
  case R.id.id_btn02: 
   Toast.makeText(this, "Inject Btn02 !", Toast.LENGTH_SHORT).show(); 
   break; 
  } 
 } 
 
} 

package com.zhy.ioc.view.annotation; 
 
import java.lang.annotation.ElementType; 
import java.lang.annotation.Retention; 
import java.lang.annotation.RetentionPolicy; 
import java.lang.annotation.Target; 
 
@Target(ElementType.ANNOTATION_TYPE) 
@Retention(RetentionPolicy.RUNTIME) 
public @interface EventBase 
{ 
 Class<?> listenerType(); 
 
 String listenerSetter(); 
 
 String methodName(); 
} 

 
package com.zhy.ioc.view.annotation; 
 
import java.lang.annotation.ElementType; 
import java.lang.annotation.Retention; 
import java.lang.annotation.RetentionPolicy; 
import java.lang.annotation.Target; 
 
import android.view.View; 
 
@Target(ElementType.METHOD) 
@Retention(RetentionPolicy.RUNTIME) 
@EventBase(listenerType = View.OnClickListener.class, listenerSetter = "setOnClickListener", methodName = "onClick") 
public @interface OnClick 
{ 
 int[] value(); 
} 

 @OnClick({ R.id.id_btn, R.id.id_btn02 }) 
 public void clickBtnInvoked(View view) 

public static void inject(Activity activity) 
 { 
  injectContentView(activity); 
  injectViews(activity); 
  injectEvents(activity); 
 } 

/** 
  * 注入所有的事件 
  * 
  * @param activity 
  */ 
 private static void injectEvents(Activity activity) 
 { 
   
  Class<? extends Activity> clazz = activity.getClass(); 
  Method[] methods = clazz.getMethods(); 
  //遍历所有的方法 
  for (Method method : methods) 
  { 
   Annotation[] annotations = method.getAnnotations(); 
   //拿到方法上的所有的注解 
   for (Annotation annotation : annotations) 
   { 
    Class<? extends Annotation> annotationType = annotation 
      .annotationType(); 
    //拿到注解上的注解 
    EventBase eventBaseAnnotation = annotationType 
      .getAnnotation(EventBase.class); 
    //如果设置为EventBase 
    if (eventBaseAnnotation != null) 
    { 
     //取出设置监听器的名称，监听器的类型，调用的方法名 
     String listenerSetter = eventBaseAnnotation 
       .listenerSetter(); 
     Class<?> listenerType = eventBaseAnnotation.listenerType(); 
     String methodName = eventBaseAnnotation.methodName(); 
 
     try 
     { 
      //拿到Onclick注解中的value方法 
      Method aMethod = annotationType 
        .getDeclaredMethod("value"); 
      //取出所有的viewId 
      int[] viewIds = (int[]) aMethod 
        .invoke(annotation, null); 
      //通过InvocationHandler设置代理 
      DynamicHandler handler = new DynamicHandler(activity); 
      handler.addMethod(methodName, method); 
      Object listener = Proxy.newProxyInstance( 
        listenerType.getClassLoader(), 
        new Class<?>[] { listenerType }, handler); 
      //遍历所有的View，设置事件 
      for (int viewId : viewIds) 
      { 
       View view = activity.findViewById(viewId); 
       Method setEventListenerMethod = view.getClass() 
         .getMethod(listenerSetter, listenerType); 
       setEventListenerMethod.invoke(view, listener); 
      } 
 
     } catch (Exception e) 
     { 
      e.printStackTrace(); 
     } 
    } 
 
   } 
  } 
 
 } 

package com.zhy.ioc.view; 
 
import java.lang.ref.WeakReference; 
import java.lang.reflect.InvocationHandler; 
import java.lang.reflect.Method; 
import java.util.HashMap; 
 
public class DynamicHandler implements InvocationHandler 
{ 
 private WeakReference<Object> handlerRef; 
 private final HashMap<String, Method> methodMap = new HashMap<String, Method>( 
   1); 
 
 public DynamicHandler(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); 
 } 
 
 @Override 
 public Object invoke(Object proxy, Method method, Object[] args) 
   throws Throwable 
 { 
  Object handler = handlerRef.get(); 
  if (handler != null) 
  { 
   String methodName = method.getName(); 
   method = methodMap.get(methodName); 
   if (method != null) 
   { 
    return method.invoke(handler, args); 
   } 
  } 
  return null; 
 } 
} 

//通过InvocationHandler设置代理       

DynamicHandler handler = new DynamicHandler(activity); 
      handler.addMethod(methodName, method); 
      Object listener = Proxy.newProxyInstance( 
        listenerType.getClassLoader(), 
        new Class<?>[] { listenerType }, handler); 

package com.zhy.invocationhandler; 
 
public class Button 
{ 
 private OnClickListener listener; 
 
 public void setOnClickLisntener(OnClickListener listener) 
 { 
 
  this.listener = listener; 
 } 
 
 public void click() 
 { 
  if (listener != null) 
  { 
   listener.onClick(); 
  } 
 } 
} 

package com.zhy.invocationhandler; 
 
public interface OnClickListener 
{ 
 void onClick(); 
} 

package com.zhy.invocationhandler; 
 
import java.lang.reflect.InvocationHandler; 
import java.lang.reflect.Method; 
import java.util.HashMap; 
import java.util.Map; 
 
public class OnClickListenerHandler implements InvocationHandler 
{ 
 private Object targetObject; 
 
 public OnClickListenerHandler(Object object) 
 { 
  this.targetObject = object; 
 } 
 
 private Map<String, Method> methods = new HashMap<String, Method>(); 
 
 public void addMethod(String methodName, Method method) 
 { 
  methods.put(methodName, method); 
 } 
 
 @Override 
 public Object invoke(Object proxy, Method method, Object[] args) 
   throws Throwable 
 { 
 
  String methodName = method.getName(); 
  Method realMethod = methods.get(methodName); 
  return realMethod.invoke(targetObject, args); 
 } 
 
} 

package com.zhy.invocationhandler; 
 
import java.lang.reflect.InvocationTargetException; 
import java.lang.reflect.Method; 
import java.lang.reflect.Proxy; 
 
public class Main 
{ 
 private Button button = new Button(); 
  
 public Main() throws SecurityException, IllegalArgumentException, NoSuchMethodException, IllegalAccessException, InvocationTargetException 
 { 
  init(); 
 } 
 
 public void click() 
 { 
  System.out.println("Button clicked!"); 
 } 
 
 public void init() throws SecurityException, 
   NoSuchMethodException, IllegalArgumentException, 
   IllegalAccessException, InvocationTargetException 
 { 
  OnClickListenerHandler h = new OnClickListenerHandler(this); 
  Method method = Main.class.getMethod("click", null); 
  h.addMethod("onClick", method); 
  Object clickProxy = Proxy.newProxyInstance( 
    OnClickListener.class.getClassLoader(), 
    new Class<?>[] { OnClickListener.class }, h); 
  Method clickMethod = button.getClass().getMethod("setOnClickLisntener", 
    OnClickListener.class); 
  clickMethod.invoke(button, clickProxy); 
   
 } 
 
 public static void main(String[] args) throws SecurityException, 
   IllegalArgumentException, NoSuchMethodException, 
   IllegalAccessException, InvocationTargetException 
 { 
 
  Main main = new Main(); 
   
  main.button.click(); 
 } 
 
} 

@Override
 public Object invoke(Object proxy, Method method, Object[] args)
 throws Throwable
 {
 String methodName = method.getName();
 Method realMethod = methods.get(methodName);
 return realMethod.invoke(targetObject, args);
 }

//通过InvocationHandler设置代理 
      DynamicHandler handler = new DynamicHandler(activity); 
      //往map添加方法 
      handler.addMethod(methodName, method); 
      Object listener = Proxy.newProxyInstance( 
        listenerType.getClassLoader(), 
        new Class<?>[] { listenerType }, handler);