Easy to use inline @Keep annotation to keep class.
And easy to install.
@Keep
@KeepClassMembers
public class KeepMe {
String keepMe;
}build.gradle:
dependencies {
compile "com.infstory:proguard-annotations:1.0.2"
}How annotations do? proguard-annotations/annotations.pro
Import from official proguard/examples/annotations/src/proguard/annotation
ref. http://proguard.sourceforge.net/manual/examples.html#annotated
$ /gradelw clean assembleRelease
$ cd proguard-annotations-app/build/outputs/apk
$ unzip proguard-annotations-app-release-unsigned.apk
$ dex2jar classes.dex
$ unzip classes_dex2jar.jar
$ tree proguard
proguard
├── annotation
│ ├── BuildConfig.class
│ ├── KeepApplication.class
│ ├── Keep.class
│ ├── KeepClassMemberNames.class
│ ├── KeepClassMembers.class
│ ├── KeepGettersSetters.class
│ ├── KeepImplementations.class
│ ├── KeepName.class
│ ├── KeepPublicClassMemberNames.class
│ ├── KeepPublicClassMembers.class
│ ├── KeepPublicGettersSetters.class
│ ├── KeepPublicImplementations.class
│ ├── KeepPublicProtectedClassMemberNames.class
│ └── KeepPublicProtectedClassMembers.class
└── app
├── KeepMe.class
└── KeepMeWithoutMembers.class
$ jd-gui classes_dex2jar.jar # Optional
$ tree proguard-annotations-app/src/main/java
proguard-annotations-app/src/main/java
└── proguard
└── app
├── DontKeepMe.java
├── KeepMe.java
└── KeepMeWithoutMembers.java
- Test Cases
For which classes I have to use it ? Only classes i made for my items ? Or also activities and services and so on?
It used to apply on reflection target. If you have not use relection, you just enable minify feature with default proguard config by the following build.gradle, and do nothing with proguard config:
android {
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt')
}
}
}When to use @Keep and when to use @KeepClassMembers ?
@Keep used to apply on runtime annotation for relection, it will keep class name and avoid be removed for optimization. @KeepClassMembers used to keep whole class with class members for POJO reflection. It's used to keep targets for Gson and Jackson JSON reflection libraries.
I don't need to write anything in my proguard rule file ? For my application or libraries or jars ?
Yes, do nothing if nothing special. Just enable minify.
Android Support Annotations - Keep
In progress:
@Keep
We've also added @Keep to the support annotations. Note however that > that annotation hasn't been hooked up to the Gradle plugin yet (though > it's in progress.) When finished this will let you annotate methods and > > classes that should be retained when minimizing the app.
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Copyright (c) 2014 Andrew Chen
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