昨天看了一段android配置aspectj實現AOP的直播視頻，就試著自己配置了一下，可能是因為我自己的AndroidStudio環境的問題，碰到了不少的坑（其實還是因為對gradle理解的不多），但總歸是配置好了，就分享一下。
試了兩種方式，不過項目下的build.gradle，沒什么變化，直接看一下代碼吧：
build.gradle(項目下)
buildscript { ext { //android appcompat支持庫版本 androidSupportVersion = '26.1.0' //編譯的 SDK 版本，如API20 compileSdkVersion = 26 //構建工具的版本，其中包括了打包工具aapt、dx等,如API20對應的build-tool的版本就是20.0.0 buildToolsVersion = "26.0.2" //兼容的最低 SDK 版本 minSdkVersion = 15 //向前兼容，保存新舊兩種邏輯，并通過 if-else 方法來判斷執行哪種邏輯 targetSdkVersion = 26 //kotlin版本號 kotlin_version = '1.2.10' kotlinVersion = "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version" appcompatV7 = "com.android.support:appcompat-v7:$androidSupportVersion" appcompatDesign = "com.android.support:design:$androidSupportVersion" constraintLayout = 'com.android.support.constraint:constraint-layout:1.0.2' } repositories { google() jcenter() mavenCentral() } dependencies { classpath 'com.android.tools.build:gradle:3.0.1' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files classpath 'org.aspectj:aspectjtools:1.8.13' classpath 'org.aspectj:aspectjweaver:1.8.13' }}allprojects { repositories { google() jcenter() mavenCentral() }}task clean(type: Delete) { delete rootProject.buildDir}看著一大堆，主要就是下面這幾行配置，其他的是我自己項目中用到的，根據自己需要配置就行。
buildscript { repositories { mavenCentral() } dependencies { classpath 'org.aspectj:aspectjtools:1.8.13' classpath 'org.aspectj:aspectjweaver:1.8.13' }}repositories { mavenCentral()}其實這幾行配置在app的build.gradle里也是可以的，但是因為項目下的build.gradle里已經有buildscript {}、allprojects {repositories{} }，就配置在這里了。
然后有兩種配置方式：
第一種
只有一個主Module app的情況下，配置app的build.gradle：
apply plugin: 'com.android.application'apply plugin: 'kotlin-android'apply plugin: 'kotlin-android-extensions'apply plugin: 'org.greenrobot.greendao'android { compileSdkVersion rootProject.ext.compileSdkVersion buildToolsVersion rootProject.ext.buildToolsVersion defaultConfig { applicationId "填入自己的applicationId" minSdkVersion rootProject.ext.minSdkVersion targetSdkVersion rootProject.ext.targetSdkVersion versionCode 1 versionName "1.0" //Lambda配置// jackOptions.enabled = true// android.compileOptions.sourceCompatibility 1.8 buildConfigField "boolean", "LOG", "true"// 顯示Log testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" //支持矢量圖 vectorDrawables.useSupportLibrary = true ndk { //選擇要添加的對應cpu類型的.so庫。 abiFilters 'armeabi', 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64', 'mips', 'mips64' } } buildTypes { release { minifyEnabled false buildConfigField "boolean", "LOG", "false"// 顯示Log proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } //Lambda配置 compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } dataBinding { enabled true } greendao { schemaVersion 1//數據庫版本號 daoPackage 'com.test.qby.newtestapplication.greendao'//設置DaoMaster、DaoSession、Dao包名 targetGenDir 'src/main/java'//設置DaoMaster、DaoSession、Dao目錄 //targetGenDirTest：設置生成單元測試目錄 //generateTests：設置自動生成單元測試用例 } lintOptions { abortOnError true }}dependencies { implementation fileTree(include: ['*.jar'], dir: 'libs') implementation rootProject.ext.kotlinVersion implementation rootProject.ext.appcompatV7 implementation rootProject.ext.constraintLayout compile rootProject.ext.appcompatDesign testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.1' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1' compile 'jp.wasabeef:glide-transformations:3.0.1' // If you want to use the GPU Filters compile 'jp.co.cyberagent.android.gpuimage:gpuimage-library:1.4.1' //騰訊bugly compile 'com.tencent.bugly:crashreport:latest.release' compile 'com.tencent.bugly:nativecrashreport:latest.release' //retrofit compile 'com.squareup.retrofit2:retrofit:2.3.0' compile 'com.squareup.retrofit2:converter-gson:2.3.0' compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0' compile 'com.squareup.okhttp3:logging-interceptor:3.9.0' //rxJava compile 'io.reactivex.rxjava2:rxandroid:2.0.1' // Because RxAndroid releases are few and far between, it is recommended you also // explicitly depend on RxJava's latest version for bug fixes and new features. compile 'io.reactivex.rxjava2:rxjava:2.1.8' //greenDao compile 'org.greenrobot:greendao:3.2.0' //換膚功能 compile 'com.zhy:changeskin:4.0.2' //AOP面向切面編程，加入這行就不用在libs下引入jar包了，不然要寫成compile file(libs/aspectjrt.jar) compile 'org.aspectj:aspectjrt:1.8.13'}/*//在項目下配置了，此處就不需要了buildscript { repositories { mavenCentral() } dependencies { classpath 'org.aspectj:aspectjtools:1.8.13' classpath 'org.aspectj:aspectjweaver:1.8.13' }}repositories { mavenCentral()}*/import org.aspectj.bridge.IMessageimport org.aspectj.bridge.MessageHandlerimport org.aspectj.tools.ajc.Mainfinal def log = project.loggerfinal def variants = project.android.applicationVariantsvariants.all { variant -> if (!variant.buildType.isDebuggable()) { log.debug("Skipping non-debuggable build type '${variant.buildType.name}'.") return } JavaCompile javaCompile = variant.javaCompile javaCompile.doLast { String[] args = ["-showWeaveInfo", "-1.5", "-inpath", javaCompile.destinationDir.toString(), "-aspectpath", javaCompile.classpath.asPath, "-d", javaCompile.destinationDir.toString(), "-classpath", javaCompile.classpath.asPath, "-bootclasspath", project.android.bootClasspath.join(File.pathSeparator)] log.debug "ajc args: " + Arrays.toString(args) MessageHandler handler = new MessageHandler(true) new Main().run(args, handler) for (IMessage message : handler.getMessages(null, true)) { switch (message.getKind()) { case IMessage.ABORT: case IMessage.ERROR: case IMessage.FAIL: log.error message.message, message.thrown break case IMessage.WARNING: log.warn message.message, message.thrown break case IMessage.INFO: log.info message.message, message.thrown break case IMessage.DEBUG: log.debug message.message, message.thrown break } } }}這一個gradle主要的東西就是這些：
//AOP面向切面編程，加入這行就不用在libs下引入jar包了，不然要寫成compile file(libs/aspectjrt.jar)compile 'org.aspectj:aspectjrt:1.8.13'import org.aspectj.bridge.IMessageimport org.aspectj.bridge.MessageHandlerimport org.aspectj.tools.ajc.Mainfinal def log = project.loggerfinal def variants = project.android.applicationVariantsvariants.all { variant -> if (!variant.buildType.isDebuggable()) { log.debug("Skipping non-debuggable build type '${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 } } }}下面那一堆是用命令在編譯最后做一些關聯的，具體的我也不懂，只管加上好了。
第二種
有多個module都需要用到aspectj，特別是組件開發的情況下，不可能每個module都配置一下，所以就需要新建一個aspectj的module作為項目的library。
app下build.gradle需要修改：
將
//AOP面向切面編程，加入這行就不用在libs下引入jar包了，不然要寫成compile file(libs/aspectjrt.jar)compile 'org.aspectj:aspectjrt:1.8.13'
去掉，改為
implementation project(':aspectjlib')不過上面這句在你添加module依賴的時候會自動生成。
新建library的build.gradle配置如下：
apply plugin: 'com.android.library'android { compileSdkVersion rootProject.ext.compileSdkVersion buildToolsVersion rootProject.ext.buildToolsVersion defaultConfig { minSdkVersion rootProject.ext.minSdkVersion targetSdkVersion rootProject.ext.targetSdkVersion versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } }}dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) implementation rootProject.ext.appcompatV7 testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.1' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1' //AOP compile 'org.aspectj:aspectjrt:1.8.13'}import org.aspectj.bridge.IMessageimport org.aspectj.bridge.MessageHandlerimport org.aspectj.tools.ajc.Mainandroid.libraryVariants.all { variant -> 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", android.bootClasspath.join( File.pathSeparator)] MessageHandler handler = new MessageHandler(true) new Main().run(args, handler) def log = project.logger 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: case IMessage.INFO: log.info message.message, message.thrown break case IMessage.DEBUG: log.debug message.message, message.thrown break } } }}注意：下面那一堆跟app的gradle中的稍微有點區別，一個是module,一個是library，gradle中的東西不一樣。
兩種配置方式基本就是這樣了，使用方法我也是剛了解一點，記錄一下簡單的計算性能的用法吧
自定義注解類：
package com.test.qby.aspectjlib.annotation;import java.lang.annotation.ElementType;import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;import java.lang.annotation.Target;/** * Created by qby on 2018/1/26 0026. * 自定義注解 */@Target(ElementType.METHOD)@Retention(RetentionPolicy.RUNTIME)public @interface IFirstAnnotation { String value();}@Target 注解目標，表示注解使用在什么地方，這里是METHOD方法；@Retention 保留策略，表示注解調用時機，這里RUNTIME運行時
切面類
import android.widget.Toast;import com.test.qby.aspectjlib.annotation.IFirstAnnotation;import com.test.qby.newtestapplication.app.MyApplication;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Pointcut;import org.aspectj.lang.reflect.MethodSignature;import java.lang.reflect.Method;import java.lang.reflect.TypeVariable;import java.util.Locale;/** * Created by qby on 2018/1/26 0026. * 自定義注解行為 */@Aspectpublic class MethodBehaviorAspect { private static final String TAG = "aspect_aby"; @Pointcut("execution(@com.test.qby.aspectjlib.annotation.IFirstAnnotation * *(..))") public void firstMethodAnnotationBehavior() { } @Pointcut("execution(* com.test.qby.newtestapplication.ui.MainActivity.aspectClick(android.view.View))") public void secondMethodAnnotationBehavior() { } @Around("firstMethodAnnotationBehavior()") public Object wavePointcutAround(ProceedingJoinPoint joinPoint) throws Throwable { MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature(); // 類名 String className = methodSignature.getDeclaringType().getSimpleName(); // 方法名 String methodName = methodSignature.getName(); // 功能名 IFirstAnnotation behaviorTrace = methodSignature.getMethod() .getAnnotation(IFirstAnnotation.class); String value = behaviorTrace.value();// String value = "點擊"; long start = System.currentTimeMillis(); Object result = joinPoint.proceed(); long duration = System.currentTimeMillis() - start; Log.e(TAG, String.format("%s類中%s方法執行%s功能,耗時：%dms", className, methodName, value, duration)); Toast.makeText(MyApplication.getContext(), String.format(Locale.CHINESE, "%s類中%s方法執行%s功能,耗時：%dms", className, methodName, value, duration), Toast.LENGTH_SHORT).show(); return result; }}@Aspect指定切面類；@Pointcut切入點；@Around是切入方式Advice的一種，表示在切入點前后插入代碼，還有@Before、@After；Pointcut語法，execution，表示根據Advice在執行方法內部代碼前后插入代碼,call，表示根據Advice在調用方法前后插入代碼......
頁面調用
@IFirstAnnotation("測試Aspect")public void aspectClick(View view) { try { Thread.sleep(new Random().nextInt(1000)); } catch (InterruptedException e) { e.printStackTrace(); } }@IFirstAnnotation調用注解，()內部為在IFirstAnnotation中寫的value的值，去掉value()后此處去掉()
注意：在MethodBehaviorAspect 類中如果有用到Context，可直接使用joinPoint.getTarget()類型轉換成Context，這里是由于項目使用了databinding，部分getTarget()獲取到的值不能強轉為Context，所以這里用的MyApplication獲取的Context
這只是個人的初步嘗試，里面當然還有很多內容需要去學，剛看了CSDN上有人寫的幾篇關于AOP的內容，都挺詳細的，給出其中一個地址
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
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