AOP 切面

最新推荐文章于 2025-05-04 15:02:31 发布

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最新推荐文章于 2025-05-04 15:02:31 发布

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分类专栏： AOP

本文链接：https://blog.youkuaiyun.com/tpsu888/article/details/95462163

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博客介绍了在模块build.gradle中添加依赖，在项目build.gradle添加对应版本号，还提到自定义注解并将其加载到要检测的方法上，最后创建切面类并添加@Aspect注解。

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模块build.gradle添加依赖

implementation'org.aspectj:aspectjrt:1.9.4'

}

import org.aspectj.bridge.IMessage

import org.aspectj.bridge.MessageHandler

import org.aspectj.tools.ajc.Main



final def log = project.logger

final def variants = project.android.applicationVariants



//在构建工程时，执行编辑

variants.all { variant ->

    if (!variant.buildType.isDebuggable()) {

        log.debug("Skipping non-debuggable build type '${variant.buildType.name}'.")

        return;

    }



    JavaCompile javaCompile = variant.javaCompile

    javaCompile.doLast {

        String[] args = ["-showWeaveInfo",

                         "-1.9",

                         "-inpath", javaCompile.destinationDir.toString(),

                         "-aspectpath", javaCompile.classpath.asPath,

                         "-d", javaCompile.destinationDir.toString(),

                         "-classpath", javaCompile.classpath.asPath,

                         "-bootclasspath", project.android.bootClasspath.join(File.pathSeparator)]

        log.debug "ajc args: " + Arrays.toString(args)



        MessageHandler handler = new MessageHandler(true);

        new Main().run(args, handler);

        for (IMessage message : handler.getMessages(null, true)) {

            switch (message.getKind()) {

                case IMessage.ABORT:

                case IMessage.ERROR:

                case IMessage.FAIL:

                    log.error message.message, message.thrown

                    break;

                case IMessage.WARNING:

                    log.warn message.message, message.thrown

                    break;

                case IMessage.INFO:

                    log.info message.message, message.thrown

                    break;

                case IMessage.DEBUG:

                    log.debug message.message, message.thrown

                    break;

            }

        }

    }

}

项目build.gradle中添加版本号要对应

classpath 'org.aspectj:aspectjtools:1.9.4'

自定义注解 annotation

/**

 * 用来表示性能监控

 */

@Target(ElementType.METHOD)

@Retention(RetentionPolicy.RUNTIME)

public @interface Behaviortrace {

    String value();

}

注解加载要检测的方法上

@Behaviortrace("摇一摇")

    public void yao(View view) {

//        long begin = System.currentTimeMillis();

        SystemClock.sleep(new Random().nextInt(2000));

//        long duration = System.currentTimeMillis() - begin;

//        Log.e("tp", "duration=="+duration);

    }

    @Behaviortrace("漂流瓶")

    public void piao(View view) {

        SystemClock.sleep(new Random().nextInt(2000));

    }

    @Behaviortrace("红包")

    public void hong(View view) {

        SystemClock.sleep(new Random().nextInt(2000));

    }

创建切面BehaviortraceAspect类，类上面加@Aspect注解

@Aspect

public class BehaviotraceAspect {

    //定义切面规则

    //1、就在原来应用中那些注解的地方，到当前切面进行处理。

    //execution(注解名  注解用的地方) ，  * *(..) 任意类 任意方法（任意参数）

    @Pointcut("execution(@com.example.aop.annotation.Behaviortrace * *(..))")

    public void methodAnnotatedWithBehaviorTrace(){}

    //2、对进入切面的内容如何处理

    //@Before() 在切入点之前运行

    //@After()  在切入点之后运行

    //@Around() 在切入点前后都运行

    @Around("methodAnnotatedWithBehaviorTrace()")

    public Object weavJoinPoint(ProceedingJoinPoint joinPoint) throws Throwable {

        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();

        String className = methodSignature.getDeclaringType().getSimpleName();

        String methodName = methodSignature.getName();

        String value = methodSignature.getMethod().getAnnotation(Behaviortrace.class).value();





        long begin = System.currentTimeMillis();

        Object result = joinPoint.proceed();

//        SystemClock.sleep(new Random().nextInt(2000));

        long duration = System.currentTimeMillis() - begin;



        Log.e("tp", String.format("%s功能：%s类的%s方法执行了，用时%d ms",

                value, className, methodName, duration));

        return result;

    }



}