dependencies {
  ...
  compile 'org.aspectj:aspectjrt:1.8.9'
}

buildscript {
  repositories {
    mavenCentral()
  }
  dependencies {
    classpath 'org.aspectj:aspectjtools:1.8.9'
    classpath 'org.aspectj:aspectjweaver:1.8.9'
  }
}

dependencies {
  ...
}
// 贴上面那段没用的代码是为了说明：下面的任务代码与dependencies同级

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

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",
             "-1.8",
             "-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;
      }
    }
  }
}

@Before("execution(public * *(..))")
public void before(JoinPoint point) {
  System.out.println("CSDN_LQR");
}

@Around("execution(* *to(..))")
public void around(ProceedingJoinPoint joinPoint) {
  System.out.println("CSDN");
  joinPoint.proceed();
  System.out.println("LQR");
}

@After("execution(* com.lqr..*to(..))")
public void after(JoinPoint point) {
  System.out.println("CSDN_LQR");
}

@AfterReturning("execution(int com.lqr.*(..))")
public void afterReturning(JoinPoint point, Object returnValue) {
  System.out.println("CSDN_LQR");
}

@AfterThrowing(value = "execution(* com.lqr..*(..))", throwing = "ex")
public void afterThrowing(Throwable ex) {
  System.out.println("ex = " + ex.getMessage());
}

@Before("execution(* com.lqr..*(..))")
public void before(JoinPoint point) {
  System.out.println("CSDN_LQR");
}

@AfterThrowing(value = "execution(* com.lqr..*(..))", throwing = "ex")
public void afterThrowing(Throwable ex) {
  System.out.println("记录日志");
}

@Pointcut("execution(* com.lqr..*(..))")
public void pointcut() {}

@Before("pointcut()")
public void before(JoinPoint point) {
  System.out.println("CSDN_LQR");
}

@AfterThrowing(value = "pointcut()", throwing = "ex")
public void afterThrowing(Throwable ex) {
  System.out.println("记录日志");
}

public void test(View view) {
  System.out.println("Hello, I am CSDN_LQR");
}

@Aspect
public class TestAnnoAspect {

  @Pointcut("execution(* com.lqr.androidaopdemo.MainActivity.test(..))")
  public void pointcut() {

  }  

  @Before("pointcut()")
  public void before(JoinPoint point) {
    System.out.println("@Before");
  }

  @Around("pointcut()")
  public void around(ProceedingJoinPoint joinPoint) throws Throwable {
    System.out.println("@Around");
  }

  @After("pointcut()")
  public void after(JoinPoint point) {
    System.out.println("@After");
  }

  @AfterReturning("pointcut()")
  public void afterReturning(JoinPoint point, Object returnValue) {
    System.out.println("@AfterReturning");
  }

  @AfterThrowing(value = "pointcut()", throwing = "ex")
  public void afterThrowing(Throwable ex) {
    System.out.println("@afterThrowing");
    System.out.println("ex = " + ex.getMessage());
  }
}

@Around("pointcut()")
public void around(ProceedingJoinPoint joinPoint) throws Throwable {
  System.out.println("@Around");
  joinPoint.proceed();// 目标方法执行完毕
}

public void test(View view) {
  System.out.println("Hello, I am CSDN_LQR");
  int a = 1 / 0;
}

@Around("pointcut()")
public void around(ProceedingJoinPoint joinPoint) throws Throwable {
  long beginTime = SystemClock.currentThreadTimeMillis();
  joinPoint.proceed();
  long endTime = SystemClock.currentThreadTimeMillis();
  long dx = endTime - beginTime;
  System.out.println("耗时：" + dx + "ms");
}

MethodSignature signature = (MethodSignature) joinPoint.getSignature();
String name = signature.getName(); // 方法名：test
Method method = signature.getMethod(); // 方法：public void com.lqr.androidaopdemo.MainActivity.test(android.view.View)
Class returnType = signature.getReturnType(); // 返回值类型：void
Class declaringType = signature.getDeclaringType(); // 方法所在类名：MainActivity
String[] parameterNames = signature.getParameterNames(); // 参数名：view
Class[] parameterTypes = signature.getParameterTypes(); // 参数类型：View

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface TestAnnoTrace {
  String value();
  int type();
}

@TestAnnoTrace(value = "lqr_test", type = 1)
public void test(View view) {
  System.out.println("Hello, I am CSDN_LQR");
}

@Pointcut("execution(@com.lqr.androidaopdemo.TestAnnoTrace * *(..))")
public void pointcut() {}

MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
// 通过Method对象得到切点上的注解
TestAnnoTrace annotation = method.getAnnotation(TestAnnoTrace.class);
String value = annotation.value();
int type = annotation.type();