Aspectj 在Android中的简单使用（Java + Kotlin） |
您所在的位置：网站首页 › aide支持kotlin吗 › Aspectj 在Android中的简单使用（Java + Kotlin） |
Aspectj 在Android中的简单使用（Java + Kotlin）
|
OOP&AOP
OOP(Object Oriented Programming):面向对象编程。把问题或功能模块化，每个模块处理自己的事。 AOP(Aspect Oriented Programming):面向切面编程。把分散于不同模块中的相同业务放到统一的地方来管理。如：日志记录，业务埋点，持久化，性能监控，数据校验，缓存，权限检查，异常处理等。 AspectJ简介AspectJ定义了AOP语法，所以它有一个专门的编译器用来生成遵守Java字节编码规范的Class文件，在编译期注入代码。代表框架：Hugo(Jake Wharton) 基本概念Join Points:连接点，程序中可切入的点。如：方法调用时，读取某个变量时 Pointcut:切入点，代码注入的位置，其实就是有条件限定的Join Point，例如只在特定方法中注入代码 Aspect:切面，一个关注点的模块化 Advice:在切入点注入的代码，一般有before、after、around三种类型 Target Object:被一个或多个aspect横切拦截操作的目标对象 Weaving:把Advice代码织入到目标对象的过程 Inter-type declarations:用来个一个类型声明额外的方法或属性 Demo示例给方法添加性能测试 Java版本1.添加依赖 Project->bulid.gradle dependencies { ... classpath 'org.aspectj:aspectjtools:1.8.13' classpath 'org.aspectj:aspectjweaver:1.8.13' } Module->build.gradle dependencies { ... implementation 'org.aspectj:aspectjrt:1.8.13' } // 最后面添加即可 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", "-1.5", "-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 } } } }2.自定义注解 @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface PerformanceAnnotation { String value(); }3.自定义切面 @Aspect public class PerformanceAspect { public static final String TAG = PerformanceAspect.class.getSimpleName(); @Pointcut("execution(@ com.tongjin.aspectj.java.PerformanceAnnotation * *(..))") public void performancePointcut(){} @Around("performancePointcut()") public Object wavePerformancePointcut(ProceedingJoinPoint joinPoint) throws Throwable { MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature(); // 类名 String className = methodSignature.getDeclaringType().getSimpleName(); // 方法名 String methodName = methodSignature.getName(); // 功能名 PerformanceAnnotation behaviorTrace = methodSignature.getMethod().getAnnotation(PerformanceAnnotation.class); String value = behaviorTrace.value(); long start = System.currentTimeMillis(); Object result = joinPoint.proceed(); long duration = System.currentTimeMillis() - start; Log.e(TAG, String.format("%s类中%s方法执行%s功能,耗时：%dms", className, methodName, value, duration)); return result; } }4.使用 @PerformanceAnnotation("performance") public void clickMe(View view) { Toast.makeText(this, "Click", Toast.LENGTH_SHORT).show(); }5.日志输出
由于java版本添加依赖的方式，在kotlin中不起作用，采用大神方案 1.添加依赖 Project->build.gradle dependencies { ... classpath 'com.hujiang.aspectjx:gradle-android-plugin-aspectjx:2.0.4' } Module->bulid.gradle apply plugin: 'android-aspectjx'2.自定义注解 @Target(AnnotationTarget.FUNCTION) @Retention(AnnotationRetention.RUNTIME) annotation class PerformanceAnnotation(val value: String)3.自定义切面 @Aspect class PerformanceAspect { companion object { val TAG = PerformanceAspect::class.java.simpleName } @Pointcut("execution(@ com.tongjin.myapplication.PerformanceAnnotation * *(..))") fun performancePointcut() { } @Around("performancePointcut()") @Throws(Throwable::class) fun wavePerformancePointcut(joinPoint: ProceedingJoinPoint) { val methodSignature = joinPoint.signature as MethodSignature // 类名 val className = methodSignature.declaringType.simpleName // 方法名 val methodName = methodSignature.name // 功能名 val behaviorTrace = methodSignature.method.getAnnotation(PerformanceAnnotation::class.java) val value = behaviorTrace.value val start = System.currentTimeMillis() joinPoint.proceed() val duration = System.currentTimeMillis() - start Log.e(TAG, "${className}类中${methodName}方法执行${value}功能,耗时：${duration}ms") } }4.使用 @PerformanceAnnotation("performance") fun clickMe(view: View) { Toast.makeText(this, "Click", Toast.LENGTH_SHORT).show() }5.日志输出
|
【本文地址】
今日新闻 |
推荐新闻 |