EventBus3.0 混淆解决方案-优快云博客

2019独角兽企业重金招聘Python工程师标准>>>

EventBus 3.0采用注解处理，为了提高效率可在编译时通过注解处理器生成索引代码。但是如果使用索引的话就不能混淆被Subscribe注解的方法。为了能够提高效率使用索引并且混淆被Subscribe注解的方法可以使***gradle.plugin.greenrobot.eventbus***插件

[TOC]

gradle.plugin.greenrobot.eventbus

gradle.plugin.greenrobot.eventbus is a gradle plugin for EventBus when use proguard.

is supports EventBus version from 3.0 and above.
is supports com.android.tools.build:gradle version from 1.5 and above.
is supports android AnnotationProcessor
is supports android-apt

Process

1. hook gradle proguard task.

2. parse mapping.txt.

3. analyse class file.

4. replace method name.

Integration

How to use

1. integration EventBus and EventBusAnnotationProcessor

2. add the jitpack repository and plugin dependency to your project build file

buildscript {
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
    }
    dependencies {
        classpath 'com.github.JackyAnn:gradle.plugin.greenrobot.eventbus:v1.0'
    }
}

3. apply plugin to you module build file

apply plugin: 'com.tobelinker.greenrobot.eventbus'

Sample

gradle.plugin.greenrobot.eventbus.sample

source code generate by EventBusAnnotationProcessor

package com.sample.index;

import org.greenrobot.eventbus.meta.SimpleSubscriberInfo;
import org.greenrobot.eventbus.meta.SubscriberMethodInfo;
import org.greenrobot.eventbus.meta.SubscriberInfo;
import org.greenrobot.eventbus.meta.SubscriberInfoIndex;

import org.greenrobot.eventbus.ThreadMode;

import java.util.HashMap;
import java.util.Map;

/** This class is generated by EventBus, do not edit. */
public class BusIndex implements SubscriberInfoIndex {
    private static final Map<Class<?>, SubscriberInfo> SUBSCRIBER_INDEX;

    static {
        SUBSCRIBER_INDEX = new HashMap<Class<?>, SubscriberInfo>();

        putIndex(new SimpleSubscriberInfo(com.tobelinker.greenrobot.eventbus.sample.BaseActivity.class, true,
                new SubscriberMethodInfo[] {
            new SubscriberMethodInfo("showMessage", com.tobelinker.greenrobot.eventbus.sample.Message.class),
            new SubscriberMethodInfo("showMessage", com.tobelinker.greenrobot.eventbus.sample.EventMessage.class),
        }));

        putIndex(new SimpleSubscriberInfo(com.tobelinker.greenrobot.eventbus.sample.MainActivity.class, true,
                new SubscriberMethodInfo[] {
            new SubscriberMethodInfo("showMessage", com.tobelinker.greenrobot.eventbus.sample.Message.class),
            new SubscriberMethodInfo("showMessage", com.tobelinker.greenrobot.eventbus.sample.EventMessage.class),
            new SubscriberMethodInfo("showMessage", String.class),
            new SubscriberMethodInfo("showMessage", Object.class),
        }));

    }

    private static void putIndex(SubscriberInfo info) {
        SUBSCRIBER_INDEX.put(info.getSubscriberClass(), info);
    }

    @Override
    public SubscriberInfo getSubscriberInfo(Class<?> subscriberClass) {
        SubscriberInfo info = SUBSCRIBER_INDEX.get(subscriberClass);
        if (info != null) {
            return info;
        } else {
            return null;
        }
    }
}

compiled code whith proguard

package com.a.a;

import java.util.*;
import a.a.a.a.*;
import com.tobelinker.greenrobot.eventbus.sample.*;

public class a implements d
{
    private static final Map<Class<?>, c> a;
    
    private static void a(final c c) {
        com.a.a.a.a.put(c.a(), c);
    }
    
    @Override
    public c a(final Class<?> clazz) {
        final c c = com.a.a.a.a.get(clazz);
        if (c != null) {
            return c;
        }
        return null;
    }
    
    static {
        a = new HashMap<Class<?>, c>();
        a(new a.a.a.a.b(com.tobelinker.greenrobot.eventbus.sample.a.class, true, new e[] { new e("showMessage", com.tobelinker.greenrobot.eventbus.sample.c.class), new e("showMessage", b.class) }));
        a(new a.a.a.a.b(MainActivity.class, true, new e[] { new e("showMessage", com.tobelinker.greenrobot.eventbus.sample.c.class), new e("showMessage", b.class), new e("showMessage", String.class), new e("showMessage", Object.class) }));
    }
}

the mapping.txt

com.sample.index.BusIndex -> com.a.a.a:
    java.util.Map SUBSCRIBER_INDEX -> a
    void <init>() -> <init>
    void putIndex(org.greenrobot.eventbus.meta.SubscriberInfo) -> a
    org.greenrobot.eventbus.meta.SubscriberInfo getSubscriberInfo(java.lang.Class) -> a
    void <clinit>() -> <clinit>
com.tobelinker.greenrobot.eventbus.sample.BaseActivity -> com.tobelinker.greenrobot.eventbus.sample.a:
    void <init>() -> <init>
    void showMessage(com.tobelinker.greenrobot.eventbus.sample.Message) -> a
    void showMessage(com.tobelinker.greenrobot.eventbus.sample.EventMessage) -> a
com.tobelinker.greenrobot.eventbus.sample.EventMessage -> com.tobelinker.greenrobot.eventbus.sample.b:
    java.lang.String message -> a
    void <init>(java.lang.String) -> <init>
    java.lang.String toString() -> toString
com.tobelinker.greenrobot.eventbus.sample.MainActivity -> com.tobelinker.greenrobot.eventbus.sample.MainActivity:
    org.greenrobot.eventbus.EventBus eventBus -> a
    void <init>() -> <init>
    void onCreate(android.os.Bundle) -> onCreate
    void onDestroy() -> onDestroy
    void showMessage(com.tobelinker.greenrobot.eventbus.sample.Message) -> a
    void showMessage(com.tobelinker.greenrobot.eventbus.sample.EventMessage) -> a
    void showMessage(java.lang.String) -> a
com.tobelinker.greenrobot.eventbus.sample.Message -> com.tobelinker.greenrobot.eventbus.sample.c:
    java.lang.String message -> a
    void <init>(java.lang.String) -> <init>
    java.lang.String toString() -> toString

the final code after processed

package com.a.a;

import java.util.*;
import a.a.a.a.*;
import com.tobelinker.greenrobot.eventbus.sample.*;

public class a implements d
{
    private static final Map<Class<?>, c> a;
    
    private static void a(final c c) {
        com.a.a.a.a.put(c.a(), c);
    }
    
    @Override
    public c a(final Class<?> clazz) {
        final c c = com.a.a.a.a.get(clazz);
        if (c != null) {
            return c;
        }
        return null;
    }
    
    static {
        a = new HashMap<Class<?>, c>();
        a(new a.a.a.a.b(com.tobelinker.greenrobot.eventbus.sample.a.class, true, new e[] { new e("a", com.tobelinker.greenrobot.eventbus.sample.c.class), new e("a", b.class) }));
        a(new a.a.a.a.b(MainActivity.class, true, new e[] { new e("a", com.tobelinker.greenrobot.eventbus.sample.c.class), new e("a", b.class), new e("a", String.class), new e("showMessage", Object.class) }));
    }
}