Proguard rename package There is a default dictionary which just contains the letters a-z. . If you search for ProGuard rules for a Java or Android library, you’ll see a lot of answers on StackOverflow that tell you to do something like this: -keep class com. Jul 15, 2015 · i have an application written in java, and i am using proguard to obfuscate it and its working very well, i mean the classes and members (data and functions) are renamed to a, ax, xy, z etc. It may help to double-check for typos too. apk package that gets created to check. Embrace the power of ProGuard and R8 today and take your Android development skills to the next level! Mar 18, 2016 · After updating my Android plugin for Gradle, Proguard stop obfuscating my utility and other class files. company1. 1 Answers ProGuard doesn't have a standard option to rename packages yet keep their simple class names. ProGuard can rename package names when obfuscating, so after compilation it might happen that the class and its resource file are no longer in the same package in the final APK. This results in obfuscated class names like these: Aug 25, 2023 · ProGuard is a java tool used for code shrinking , optimization, and obfuscation code (rename the classes, fields) in Android development. This article describes how to use ProGuard’s plugin proguard-maven-plugin to obfuscate Java programs. You could create a ProGuard mapping file manually, with lines like: Apr 1, 2018 · How does ProGuard’s Name Obfuscation work ProGuard uses dictionaries to define to what to rename a package, class or method. Nov 6, 2019 · Below is an example of a mapping. However, from a first glance, your issue does not seem to be related to Proguard. Sep 29, 2017 · Troubleshooting ProGuard issues on Android Why ProGuard? ProGuard is a tool that shrinks, optimizes and obfuscates code. If the package name of some class is missing, ProGuard won't match the elements that you might be expecting. jar @proguard. Although I encourage you to look further into it, there's really no point in shipping an app full of useless code, two or three times the size it could have been without it. Sep 29, 2025 · Learn how to enable R8 to optimize your app size and speed. e. This guide will show you how to configure ProGuard to retain the original class names in your app to make it easier to trace ProGuard offers options with filters for many different aspects of the configuration: names of files, directories, classes, packages, attributes, optimizations, etc. ProGuard is a popular tool for code shrinking and obfuscation in Android applications, which helps improve performance and protect your code. Proguard keep inner class Java -jar proguard. customcomponents How can I do this? I hate to be placing -keep flags for every single custom component file I have in this direc For native methods: ProGuard manual > Examples > Processing native methods # note that <methods> means any method -keepclasseswithmembernames,includedescriptorclasses class * { native <methods>; } In this case, for callback methods: ProGuard manual > Examples > Processing callback methods -keep class mypackage. jar options Ã, ã, Genre: Java-jar proguard. wvengen:proguard-maven-plugin:2. It seems that you are calling a method on a null item there. jar @ myconfig. The first step is to download the dex2jar program and use it to decompile the Dalvik code (. com I'm using ProGuard primarily because I have a library defining a class in the java. pro Nov 13, 2021 · Because Java code is very easy to decompile, Java code obfuscation is needed to protect Java source code well. For example, if you have a class named User and it has variables such as firstName and lastName, the Proguard will rename your User class to A or something like that. Apr 28, 2019 · ProGuard 是一个免费开源的 java包优化和混淆的工具。 官方介绍 Introduction ProGuard是Java类文件缩减器，优化器，混淆器和预验证器。 压缩 (Shrink)步骤检测并删除未使用的类，字段，方法和属性。 优化 (Optimize)步骤分析并优化方法的字节码。 混淆 (Obfuscate)步骤使用简短的无意义名称重命名剩余的类 When writing output entries, ProGuard generally packages the results in a sensible way, reconstructing the input entries as much as required. If I "keep" module-info, which is often suggested online to prevent renaming the file, then elements inside module-info. Binds by default to the lifecycle phase: package. There are several rules which control the naming of classes, methods, and fields: Rule Description -keeppackagenames [<filter>] Don’t rename packages which match the filter. utils. -package and I want that to be renamed so the application can be run on a J2ME device. It renames the remaining classes, fields, and methods using short meaningless names. library. You could create a ProGuard mapping file manually, with lines like: Jul 24, 2025 · Learn how to rename Android Studio project safely. In real use cases, you can let ProGuard do at least some of it’s work. You can see that it is renaming class packages and the methods inside to something like a or a. pro Notes: class_path is a list of jars, apks, aabs, aars, wars, ears, jmods, zips, and directories, with optional filters, separated by path separators. How do I keep Proguard from obfuscating specific class names? Sep 14, 2016 · I have some classes which are used via reflection. If filename contains special characters, the entire name should be quoted with single or double quotes. You could create a ProGuard mapping file manually, with lines like: Learn how to use ProGuard to retain class names while modifying package names in your Java or Android application for better obfuscation. Sometimes it’s possible to obfuscate a class name but not shrink/optimize it, in those cases you could opt for a keep rule as The ProGuard tool shrinks, optimizes, and obfuscates your code by removing unused code and renaming classes, fields, and methods with semantically obscure names. DirectoryName -BasDirectory Specifies the basic directory for subsequent relative file names. It will lead to the bug in your application. Apr 12, 2022 · Learn why you need to think in terms of Java when writing keep rules for Kotlin code and how to maintain security in the Age of Kotlin Programming Language. Jan 21, 2025 · By following the steps and best practices outlined in this article, you can confidently implement ProGuard and R8 in your Jetpack Compose-based application, delivering a high-quality and secure product to your users. dex file) to a Java archive file (. I want to exclude some file paths from ProGuard. Because ProGuard makes your application harder to reverse engineer, it is important that you use it when your application utilizes features that are 10 if you don't want all inner class and members in some package to be obfuscated you can add lines in proguard-rules. myapp. Also, you could check if Proguard is the culprit, by disable-ing it and Jan 28, 2022 · Android has Proguard capability to minimize the size of the APK. Jul 4, 2017 · ProGuard does not have a standard option to rename packages yet keep their simple class names. This allows you to compress, optimize and obfuscate Sep 9, 2020 · There is currently no support for renaming inside XML layouts. (ProGuard Apr 3, 2013 · ProGuard doesn't have a standard option to rename packages yet keep their simple class names. The problem is that these don't load correctly if their names are changed. Use -keepclasseswithmembers instead! Because of these lines { public <methods>; public <fields>; } all your public methods will be left untouched, which means that repackaging and renaming methods, referenced from your public methods can not be Jun 8, 2020 · Proguard may assign the same name (A. The Dual Role of -keep Preventing Obfuscation: Using -keep tells ProGuard not to rename the Java obfuscation is crucial for protecting your application’s code from reverse engineering and unauthorized access. You can use the -printseeds option to see which elements are being kept exactly. Feb 4, 2021 · If you wish to confirm whether ProGuard is preserving certain annotations or classes, you can review the . Complete guide covers package names, display names, and folder structure changes. Jun 25, 2020 · Just an idea: another hack would be to add a manual step in Gradle to rename (move) the proguard jar to the jar name of jar-task before running the Jib task, but perhaps this is not a good practice. Jan 18, 2023 · Learn how to reduce the size of your mobile app via code and resource shrinking using R8 and Proguard rules in Android. First add the sbt-proguard plugin to the plugins. 7. Is there any way to specify that all the classes in a particular package (as oppo Obfuscation generally refers to a broad set of techniques that make code more difficult to understand and reverse engineer, but in the context of R8 rules and documentation it specifically refers to Renaming of packages, classes, methods, and fields that R8 performs. The resulting applications and libraries ProGuard offers options with filters for many different aspects of the configuration: names of files, directories, classes, packages, attributes, optimizations, etc. My code in c++ depends on the packagename, so I need to prevent the packagename from being renamed by Proguard. but w If ProGuard is not keeping the right classes or class members, make sure you are using fully qualified class names. The goal is thread-safe and supports parallel builds. sbt file: Mar 16, 2020 · Android's build tools come with a few ProGuard facets to squeeze the most juice out of your release builds. You should check your MyClass. By adding the following option to the configuration (proguard-rules. pro and then type: java -jar proguard. 1-SNAPSHOT:proguard Description: Runs ProGuard as part of the build. In this post we'll cover what they all are, what's inside 'em, and what you can do with this knowledge! Mar 9, 2020 · R8 Missing class: X Error: Compilation can't be completed because some library classes are missing. Requires dependency resolution of artifacts in scope: compile. lang. By default, obfuscated classes are put in the o package by ProGuard. jar file). proguard:proguard Full name: com. ** { *; } That advice is really bad, and you should never do it. b. filename can contain Java system properties delimited by ' <' and '> '. ProGuard is a free Java app for Android that allows us to do the following: Reduce (minimize) the code: Unused code in the project should be removed. Dec 18, 2023 · Understanding the Role of the -keep Option in ProGuard A common area of confusion when working with ProGuard is understanding exactly what the -keep option does and does not do. Jul 23, 2015 · I want to rename only package name in my application from com. In this blog, we will learn about the things that we should know before using Proguard in Android application. Improve the code: Inline the functions, for example. foo. txt file, which showcases what obfuscation is doing under the hood. I use a c++ native Library in my Android project, but when Proguard is Enabled, the app crashes. class) to two different fragments in different packages while obfuscating. Feb 20, 2018 · ProGuard can rename package names when obfuscating, so after compilation it might happen that the class and its resource file are no longer in the same package in the final APK. Simultaneously, your variable names may be altered to some x, y, or z. utils --> com. company2. g. Required Parameters When compiled, additional info describing the module (i. And according to this stack-overflow answer, which stated that: proguard automatically add rules specific for android/google package. In this case, two fragments will have the same TAG. There is no need to reference the old names. -Injars Class_Path Specifies the program vessels (or wars, ears Proguard may assign the same name (A. github. -keepclassmembers This protects only the members of the class from shrinking and obfuscation. Example com. , if all public AutoRenamingTool, or ART, is a tool for remapping/renaming the contents of a JAR file, with extensibility for applying other transformations, both built-in and user-provided. Let’s consider the following code with this lonely class: When optimizing with ProGuard, it will start by processing Foo. pro options @filename abbreviation of 'file name -Clude'. a. Whether they have public members or not. Using tools such as ProGuard and yGuard can significantly enhance code security, thus mitigating the risk of intellectual property theft. Code obfuscation: Rename the names of classes, fields, and so on. How to tell ProGuard to keep everything in a particular package? You can disable code shrinking and other optimizations, but leave the obfuscation step. class are wrong, and classes cannot be loaded at runtime. While there are other tools available for developers, ProGuard is readily … Create a package that contains a single fat-jar that has been shrunken / optimized / obfuscated with proguard. Writing everything to an output directory is the most straightforward option: the output directory will contain a complete reconstruction of the input entries. String); } Or e. As part of the compilation process the aapt2 tool will generate -keep rules for the names present in the XML layouts, so the Android runtime will be able to perform the required reflection for layout inflation. It can be configured through a set of rules to control how Sep 15, 2025 · Understanding ProGuard in Android Proguard is an open-source tool designed to shrink, optimize and obfuscate Java bytecode. I however use a classloader to dynamically load different extensions to my application. See full list on guardsquare. It’s an essential part of the build process for releasing production-ready apps, offering Oct 23, 2017 · By default, packages that contain classes that can't be renamed aren't renamed either, and the package hierarchy is preserved. A typical application To shrink, optimize, and obfuscate the ProGuard application itself, one would typically create a configuration file proguard. A package name will remain readable if at least one class in the package is kept. How ProGuard works ProGuard can rename classes, fields and methods by removing useless code and using short, meaningless names. Clarifying this is crucial for writing effective ProGuard rules that align with your app’s optimization and security needs. MyCallbackClass { void myCallbackMethod(java. This guide delves into popular Java obfuscation tools, their unique features, and how to implement them effectively. So, we created a list of things that you should know before using Proguard. Proguard is used to minify, obfuscate and optimize the Android code. After few searching, I found that Android studio gradle now uses newer version of Proguard. Overview of Keep Options Jun 10, 2012 · 41 Hello I am writing an Android app and I have set up Proguard to obfuscate my application. pro) -printconfiguration <somefile> the full Quick Start • Features • Contributing • License ProGuard is a free shrinker, optimizer, obfuscator, and preverifier for Java bytecode: It detects and removes unused classes, fields, methods, and attributes. However, during the obfuscation process, it might rename your class names, making debugging and maintenance more difficult. Keep your mapping file of the Proguard to trace back to the original code. Nov 7, 2024 · ProGuard is a powerful tool that shrinks, optimizes, and obfuscates your Android application code. So let’s look through the more specific -keep variants. This is the NeoForged successor to ForgeAutoRenamingTool or FART. It shrinks APK sizes by removing unused code and obfuscates the Dec 6, 2017 · You only have to change the keep s to point to the new package/class names. java class at line 427. FILENAME -Includes read configuration options from the specified file. Jan 31, 2023 · If you keep a class, its package structure remains kept as well. class. Apr 1, 2018 · How does ProGuard’s Name Obfuscation work ProGuard uses dictionaries to define to what to rename a package, class or method. It optimizes bytecode and removes unused instructions. First, it’s overly broad — that double-asterisk in the package means every class under every package under that top-level package; and the asterisk Jul 23, 2025 · So, if you use Proguard, the Proguard will modify the class, variable, and method names. How to do this using ProGuard? I Don't want to apply any optimizations in this except changing my package names. , packages) gets added to this compiled "class" -- package names that Proguard changes afterwards. It appears ProGuard is removing these when I build for release. This plays two parts… it shrinks the size of the application by renaming your super descriptive function names of Jan 30, 2018 · This line in your rules keeps all your classes and interfaces: -keep public class * { I mean ALL of them. Attributes: Requires a Maven project to be executed. The result is a smaller sized . apk file that is more difficult to reverse engineer. Even if your variables are accessed by reflection, you could remove and rename unused classes, for example. 答案： ProGuard doesn't have a standard option to rename packages yet keep their simple class names. tylhnk hghvj oadh scrts mophxav hnqalk xtjtf weyuwg zcmxz znw uuiwcu fojvijmx uaebh uqeoie mhii