定义注解：

package com.fyfeng.android.annotations;

import java.lang.annotation.ElementType;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.annotation.Target;

@Retention(value = RetentionPolicy.RUNTIME)

@Target(value = { ElementType.METHOD })

public @interface ClickMethod {

int id();

}

注解处理：

package com.fyfeng.android.annotations;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import android.app.Activity;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

public class AnnotationUtils {

private static final String tag = AnnotationUtils.class.getSimpleName();

public void init(final Activity activity) {

this.bindClick(activity);

}

public void bindClick(final Activity activity) {

Method[] methods = activity.getClass().getDeclaredMethods();

for (int k = 0; k < methods.length; k++) {

final Method m = methods[k];

Log.d(tag, "method[" + m.getName() + "]");

if (!m.isAnnotationPresent(ClickMethod.class)) {

continue;

}

ClickMethod click = m.getAnnotation(ClickMethod.class);

Log.d(tag, m.getName() + " 发现注解.");

final View view = activity.findViewById(click.id());

view.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

try {

m.invoke(activity, new Object[] {});

} catch (IllegalArgumentException e) {

e.printStackTrace();

} catch (IllegalAccessException e) {

e.printStackTrace();

} catch (InvocationTargetException e) {

e.printStackTrace();

}

}

});

}

}

}

使用示例：

package com.fyfeng.test;

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

import com.fyfeng.android.annotations.AnnotationUtils;

import com.fyfeng.android.annotations.ClickMethod;

public class MainActivity extends Activity {

private static final String tag = MainActivity.class.getSimpleName();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

AnnotationUtils autil = new AnnotationUtils();

autil.init(this);

}

@ClickMethod(id = R.id.text)

public void doClick() {

Log.d(tag, "----------------------");

}

@ClickMethod(id=R.id.text2)

public void doSecClick(){

Log.d(tag, "----------------------1");

}

}