HiBeaver是一个用于进行Java字节码插桩的Gradle插件，可以用来:
1.修改Jar文件内部的代码实现，注入逻辑（同时还支持对Android的aar文件进行修改）。
2.实现Java轻量级AOP设计，支持Android Gradle Plugin。
结合强大的Java ASM字节码修改工具和Gradle Transform API，HiBeaver可以实现在Android应用编译阶段，依据使用者的配置，对工程内所包含的Java字节码进行修改，从而支持使用者仅通过Gradle配置对字节码进行代码注入和AOP设计，或对项目依赖的Jar包内的代码增加Hook节点。
从1.2.7版本开始，HiBeaver不再依赖于Android编译插件，可以在Gradle环境下独立运行，随心所欲地修改Jar/Aar文件内的代码逻辑。
Beaver，即河狸，是一种日日忙碌于在自己栖息河流上修建和装修大坝的可爱小动物。河狸的堤坝虽说不上像三峡那样“高峡出平湖”，却也为自然和生态做出了暖男般的贡献。
该插件已经上传到Jcenter,可直接引用最新版本如下：
classpath 'com.bryansharp:hibeaver:1.2.7'
在1.2.7及以上的版本中，hibeaverModifyFiles任务不再依赖Android的gradle插件，也就是说只要你有gradle和Java运行环境，建一个build.gradle就可以指定Jar/Aar文件进行修改了。详见testJarModify目录下的示例。
然后在工程的build.gradle里加入如下片段（或通过其他.gradle引入）：
apply plugin: 'hiBeaver'
import com.bryansharp.gradle.hibeaver.utils.MethodLogAdapter
import org.objectweb.asm.ClassVisitor
import org.objectweb.asm.MethodVisitor
import org.objectweb.asm.Opcodes
//or you can import like bellow:
//import org.objectweb.asm.*
hiBeaver {
//下面这个参数仅仅影响log输出，为本次修改命名，无实际意义，不配置也可以
hiBeaverModifyName = 'myHibeaverTest'
//设置为true可以显示帮助内容，默认为true
showHelp = true
//keepQuiet默认为false,为true时不会有字节码修改的log输出，建议为false
keepQuiet = false
//下面的参数设置为true时会输出工程编译耗时信息
watchTimeConsume = false
//重头戏是配置下面的参数：modifyMatchMaps
//基础配置结构形如： ['class':[[:],[:]],'class':[[:],[:]]], 类型是 Map<String, List<Map<String, Object>>>
modifyMatchMaps = [
//此处可以进行模糊匹配，!表示排除，!android*即表示排除掉android开头的全类名。
//|符号不完全表示或，而仅仅是匹配的分隔符。*表示任意长度（>0）的任意字符
'*Activity|*Receiver|!android*' : [
//methodDesc设置为空代表对methodDesc不进行限制
//方法名也可以用模糊匹配 用javap -s 命令来查看类中方法的description
['methodName': 'on**', 'methodDesc': null, 'adapter': {
ClassVisitor cv, int access, String name, String desc, String signature, String[] exceptions ->
MethodVisitor methodVisitor = cv.visitMethod(access, name, desc, signature, exceptions);
MethodVisitor adapter = new MethodLogAdapter(methodVisitor) {
@Override
void visitCode() {
super.visitCode();
methodVisitor.visitLdcInsn(desc);
methodVisitor.visitLdcInsn(name);
//下面这行代码 为要调用的方法，请酌情修改
methodVisitor.visitMethodInsn(Opcodes.INVOKESTATIC,
"bruce/com/testhibeaver/MainActivity",
"hookXM", "(Ljava/lang/Object;Ljava/lang/Object;)V");
}
}
return adapter;
}]
]
,
//此处以r:开头，代表正则表达式匹配模式
'r:.*D[a-zA-Z]*Client' : [
['methodName': 'on**', 'methodDesc': null, 'adapter': {
ClassVisitor cv, int access, String name, String desc, String signature, String[] exceptions ->
MethodVisitor methodVisitor = cv.visitMethod(access, name, desc, signature, exceptions);
MethodVisitor adapter = new MethodLogAdapter(methodVisitor) {
@Override
void visitCode() {
super.visitCode();
}
}
return adapter;
}]
]
]
//下面为对Jar或Aar进行单独修改的配置，执行hibeaverModifyFiles的Gradle任务来对路径所指向的文件进行修改，
//产出物在build/HiBeaver目录下
modifyTasks = ["${rootDir.absolutePath}/submodule/app/libs/MiPush_SDK_Client_3_2_2.jar": modifyMatchMaps]
}本repo项目中还包含一个submodule，里面有本插件的demo，可以使用git submodule来进行初始化，然后在项目根目录加入settings.gradle并编辑（include ':submodule:app'）来包含这个子项目（是一个app demo）。
玩的愉快！有任何问题和bug请提issue，欢迎参与到本项目的完善中！
By applying the regular expression and wildcard features, HiBeaver now has been upgraded to a Java lightweight AOP design tool.
Beaver means 河狸 in Chinese, cute animals always busy in building their cute river dam.
Basically, HiBeaver is a Gradle plugin for modifying your java byte code.
This plugin has been uploaded to jcenter. You can use this by adding the following code to your buildScripts:
classpath 'com.bryansharp:HiBeaver:1.2.7'and then add this to you app build scripts:
import com.bryansharp.gradle.hibeaver.utils.MethodLogAdapter
import org.objectweb.asm.ClassVisitor
import org.objectweb.asm.MethodVisitor
import org.objectweb.asm.Opcodes
//or you can import like bellow:
//import org.objectweb.asm.*
hiBeaver {
//this will determine the name of this hibeaver transform, no practical use.
hiBeaverModifyName = 'myHibeaverTest'
//turn this on to make it print help content, default value is true
showHelp = true
//this flag will decide whether the log of the modifying process be printed or not, default value is false
keepQuiet = false
//this is a kit feature of the plugin, set it true to see the time consume of this build
watchTimeConsume = false
//this is the most important part
//basic structure is like ['class':[[:],[:]],'class':[[:],[:]]], type is Map<String, List<Map<String, Object>>>
//advanced structure is like: ['classMatchPattern':['classMatchType':'wildcard','modifyMethods':[[:],[:]]],'classMatchPattern':['classMatchType':'regEx','modifyMethods':[[:],[:]]]]
modifyMatchMaps = [
//this is the basic version
'classname of which to be modified': [
// you can use javap -s command to get the description of one method
// the adapter is a closure
['methodName': 'the name of the method', 'methodDesc': 'javap -s to get the description', 'adapter': {
//the below args cannot be changed, to copy them entirely with nothing changed is recommended
ClassVisitor cv, int access, String name, String desc, String signature, String[] exceptions ->
//return null to modify nothing
return null;
}]
,
['methodName': 'the name of the method2', 'methodDesc': 'javap -s to get the description', 'adapter': {
ClassVisitor cv, int access, String name, String desc, String signature, String[] exceptions ->
return null;
}]
]
,
//the latter ones are advanced cases
'*Activity' : [
//the value of classMatchType can either be one of the three: all,regEx,wildcard
//default value is all
'classMatchType': 'wildcard',
'modifyMethods' : [
//methodMatchType会同时对methodName和methodDesc的匹配生效
//methodDesc设置为空代表对methodDesc不进行限制
['methodName': 'on**', 'methodMatchType': 'wildcard', 'methodDesc': null, 'adapter': {
ClassVisitor cv, int access, String name, String desc, String signature, String[] exceptions ->
MethodVisitor methodVisitor = cv.visitMethod(access, name, desc, signature, exceptions);
MethodVisitor adapter = new MethodLogAdapter(methodVisitor) {
@Override
void visitCode() {
super.visitCode();
methodVisitor.visitLdcInsn(desc);
methodVisitor.visitLdcInsn(name);
methodVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "bruce/com/testhibeaver/MainActivity", "hookXM", "(Ljava/lang/Object;Ljava/lang/Object;)V");
}
}
return adapter;
}]
]
]
,
'.*D[a-zA-Z]*Receiver' : [
'classMatchType': 'regEx',
'modifyMethods' : [
['methodName': 'on**', 'methodMatchType': 'wildcard', 'methodDesc': null, 'adapter': {
ClassVisitor cv, int access, String name, String desc, String signature, String[] exceptions ->
MethodVisitor methodVisitor = cv.visitMethod(access, name, desc, signature, exceptions);
MethodVisitor adapter = new MethodLogAdapter(methodVisitor) {
@Override
void visitCode() {
super.visitCode();
methodVisitor.visitLdcInsn(desc);
methodVisitor.visitLdcInsn(name);
methodVisitor.visitMethodInsn(Opcodes.INVOKESTATIC, "bruce/com/testhibeaver/MainActivity", "hookXM", "(Ljava/lang/Object;Ljava/lang/Object;)V");
}
}
return adapter;
}]
]
]
]
}You can also see the content above in the build log outputs.
There is also a demo showing how to use it. You can either get it through git submodule and add a settings.gradle file to include the module, or get it by checking out hiBeaverDemo.
Hope you can enjoy it! Any comment and suggestion is welcomed.