关于 AOP 的详细介绍请参考 深入理解Android之AOP
本文主要介绍 怎么在 AndroidStudio 中使用 AspectJ
1 . 在android studio 中新建一个项目 MyApplication
2. 在 app 目录下 的 build.gradle 中完成如下配置:
apply plugin: 'com.android.application'
import org.aspectj.bridge.IMessage
import org.aspectj.bridge.MessageHandler
import org.aspectj.tools.ajc.Main
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'org.aspectj:aspectjtools:1.8.9'
}
}
repositories {
mavenCentral()
}
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.example.yqqyang.myapplication"
minSdkVersion 23
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'
compile 'org.aspectj:aspectjrt:1.8.9'
}
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;
}
}
}
}
如此 gradle 的配置就算完成了,接下来要编写代码了
3.在MainActivity 的同级目录下创建 AspectMethod.java 文件.
4. 在 AspectMethod.java 中编写代码(下方代码中com.example.yqqyang.myapplication.MainActivity 请换成 自己的包名类名):
package com.example.yqqyang.myapplication;
import android.util.Log;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
/**
* @author YQQ.yang.
* @date 2017/5/10 9:26.
*/
@Aspect
public class AspectMethod {
private static final String TAG = "QQ";
@Before("execution(* com.example.yqqyang.myapplication.MainActivity.*(..))")
public void beforeMethodExe(JoinPoint joinPoint) {
Log.e(TAG, "before----- > " + System.currentTimeMillis());
}
@After("execution(* com.example.yqqyang.myapplication.MainActivity.*(..))")
public void afterMethodExe(JoinPoint joinPoint) {
Log.e(TAG, "after ----- > " + System.currentTimeMillis());
}
}
5. 运行 app moudle
在 logcat 会有如下输出:
打开 app/build/intermediates/classes/debug/com/example/yqqyang/myapplication/MainActivity.class 文件,会发现 编译后的 MainActivity 里面的代码已经改变了:
