A plugin that quickly pushes the specified class into Maindex

Project address: github.com/JeasonWong/…

Usage scenarios

There are many scenarios, but let me start with two:

• When multidex is used for subcontracting, app is started for the first time to optimize

• Proxy applications, such as InstantRun and other Hotfix frameworks, are needed

• …

How to use

The official plan

There are two ways to add a specified class to maindex:

• MultiDexKeepProguard file (“. / maindex – rules. Pro ‘)
• MultiDexKeepFile file (“. / maindex. TXT “)

I won’t go into details about the use of these two schemes.

MainDexWrapper

configuration

MainDexWrapper supports two ways, one of which is similar to the official multiDexKeepProguard file(‘./maindex-rules.pro’).

Build. Gradle first relies on the plugin at the root:

buildscript {
    repositories {
        maven {
            url 'https://dl.bintray.com/wangyuwei/maven'
        }
    }
    dependencies {
        classpath 'me.wangyuwei:maindexwrapper-plugin:1.0.0'
    }
}
allprojects {
    repositories {
        maven {
            url 'https://dl.bintray.com/wangyuwei/maven'
        }
    }
}Copy the code

Then use the plugin in your app’s build.gradle:

Apply the plugin: 'me. Wangyuwei. Maindexwrapper' compile 'me. Wangyuwei: maindexwrapper - annotations: 1.0.0'Copy the code

use

# #-keep class me.wangyuwei.maindexwrapper.demo.Demo {*; }Copy the code

import me.wangyuwei.maindexwrapper.annotations.KeepMainDex;
@KeepMainDex
public class Demo {
    public class InnerClass {
    }
}Copy the code

The principle of

It’s really simple.

Add our keep-rules to /intermediates/multi-dex/${varie.dirname}/manifest_keep.txt before executing the multidexTask.

Manifest_keep. TXT is an important document in the multidex subcontracting process, where the keep class is entered into maindex.

There are now two easy ways to implement plug-ins:

The first is to copy the contents of the developer’s written Maindex-rules.pro directly into the manifest_keep.txt.

The second is to annotate the classes before the dex is generated. The classes that contain the @keepmaindex annotation are collected and copied into the manifest_keep.txt like the former. The ASM traversal classes I use here, Note that you need to replace the “/” in ClassName with “.”, and the rest is simple.

The tail language