Develop Reference

Android R8 not obfuscating class names

I have been researching this for the past few hours without any luck. Class names are not obfuscated no matter what. These are just regular classes, not Activities, Services, or something else which is also in Android Manifest (I know those don't get obfuscated). What am I missing here?
Android Gradle Plugin version: 4.0.0
Gradle version: 6.1.1
Android Studio version: 4.0
With these versions, R8 should be enabled by default. Here is my buildType config:
buildTypes {
release {
//useProguard false // even tried this without luck
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
signingConfig signingConfigs.release
}
}
Here is my proguard-rules.pro
-ignorewarnings
# --- Glide ---
-keep public class * implements com.bumptech.glide.module.GlideModule
-keep public class * extends com.bumptech.glide.module.AppGlideModule
-keep public enum com.bumptech.glide.load.ImageHeaderParser$** {
**[] $VALUES;
public *;
}
# --- Billing library ---
-keep class com.android.vending.billing.**
# --- Retrofit2 ---
# Retrofit does reflection on generic parameters. InnerClasses is required to use Signature and
# EnclosingMethod is required to use InnerClasses.
-keepattributes Signature, InnerClasses, EnclosingMethod
# Retrofit does reflection on method and parameter annotations.
-keepattributes RuntimeVisibleAnnotations, RuntimeVisibleParameterAnnotations
# Retain service method parameters when optimizing.
-keepclassmembers,allowshrinking,allowobfuscation interface * {
#retrofit2.http.* <methods>;
}
# Ignore annotation used for build tooling.
-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
# Animal Sniffer compileOnly dependency to ensure APIs are compatible with older versions of Java.
-dontwarn org.codehaus.mojo.animal_sniffer.*
# Ignore JSR 305 annotations for embedding nullability information.
-dontwarn javax.annotation.**
# With R8 full mode, it sees no subtypes of Retrofit interfaces since they are created with a Proxy
# and replaces all potential values with null. Explicitly keeping the interfaces prevents this.
-if interface * { #retrofit2.http.* <methods>; }
-keep,allowobfuscation interface <1>
# --- TwitterKit ---
#Picasso Proguard Config https://github.com/square/picasso
-dontwarn com.squareup.okhttp.**
# --- GSON ---
# Gson uses generic type information stored in a class file when working with fields. Proguard
# removes such information by default, so configure it to keep all of it.
-keepattributes Signature
# For using GSON #Expose annotation
-keepattributes *Annotation*
# Gson specific classes
-dontwarn sun.misc.**
#-keep class com.google.gson.stream.** { *; }
# Application classes that will be serialized/deserialized over Gson
-keep class com.google.gson.examples.android.model.** { <fields>; }
# Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory,
# JsonSerializer, JsonDeserializer instances (so they can be used in #JsonAdapter)
-keep class * implements com.google.gson.TypeAdapter
-keep class * implements com.google.gson.TypeAdapterFactory
-keep class * implements com.google.gson.JsonSerializer
-keep class * implements com.google.gson.JsonDeserializer
# Prevent R8 from leaving Data object members always null
-keepclassmembers,allowobfuscation class * {
#com.google.gson.annotations.SerializedName <fields>;
}
# --- SciChart ---
# ignore warnings and save classes required for syntax highlighting
-dontwarn java.awt.**
-dontwarn javax.swing.**
-dontwarn syntaxhighlight.**
-keep public class java.awt.** { *; }
-keep public class javax.swing.** { *; }
-keep public class syntaxhighlight.** { *; }
-keep public class prettify.** { *; }
# need to keep these classes and their methods because they are used by resampling code
-keep public class com.scichart.core.model.DoubleValues { *; }
-keep public class com.scichart.core.model.FloatValues { *; }
-keep public class com.scichart.core.model.IntegerValues { *; }
-keep public class com.scichart.data.model.Point2DSeries { *; }
# repack obfuscated classes into single package so it would be hard to find their originall package
-repackageclasses ''
-allowaccessmodification
Similar questions which I checked but didn't offer any solutions to this:
Android studio 3.4.2 R8 obfuscator does not obfuscate class names, but only java code inside
Class no longer obfuscated after upgrading to Android Gradle plugin 3.4.0
Android/java: Transition / Migration from ProGuard to R8?

As per WorkManager's proguard file, it is expected that all classes that extend ListenableWorker (and its subclasses, such as Worker) are kept. This is because the name of the class is the unique key in WorkManager's internal database.

How to fix java.lang.noclassdefounderror for Calligraphy Xamarin.Android Error

This error is making me sick, when ever I get this error I have to build-clean my project for like 5-8 times and after that my app runs else it does not. I have been facing this issue after I used calligraphy for custom fonts. If there is any other library better than this then please recommend I am just tired of this error.
I have enabled mulltidex in my application
Proguard file for reference.
# This is a configuration file for ProGuard.
# http://proguard.sourceforge.net/index.html#manual/usage.html
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-verbose
# Optimization is turned off by default. Dex does not like code run
# through the ProGuard optimize and preverify steps (and performs some
# of these optimizations on its own).
-dontoptimize
-dontpreverify
# Note that if you want to enable optimization, you cannot just
# include optimization flags in your own project configuration file;
# instead you will need to point to the
# "proguard-android-optimize.txt" file instead of this one from your
# project.properties file.
-keepattributes *Annotation*
-keep public class com.google.vending.licensing.ILicensingService
-keep public class com.android.vending.licensing.ILicensingService
# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
-keepclasseswithmembernames class * {
native <methods>;
}
# keep setters in Views so that animations can still work.
# see http://proguard.sourceforge.net/manual/examples.html#beans
-keepclassmembers public class * extends android.view.View {
void set*(***);
*** get*();
}
# We want to keep methods in Activity that could be used in the XML attribute onClick
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}
# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keepclassmembers class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator CREATOR;
}
-keepclassmembers class **.R$* {
public static <fields>;
}
# The support library contains references to newer platform versions.
# Don't warn about those in case this app is linking against an older
# platform version. We know about them, and they are safe.
-dontwarn android.support.**
# Understand the #Keep support annotation.
-keep class android.support.annotation.Keep
-keep #android.support.annotation.Keep class * {*;}
-keepclasseswithmembers class * {
#android.support.annotation.Keep <methods>;
}
-keepclasseswithmembers class * {
#android.support.annotation.Keep <fields>;
}
-keepclasseswithmembers class * {
#android.support.annotation.Keep <init>(...);
}
-keep class com.google.android.gms.** { *; }
-dontwarn com.google.android.gms.**

Android Proguard unable to obfuscate libaary aar package name

I'm trying to Obfuscate using proguard ,
I use some library Projects and aar libs. For both of these the pacakge name is visible. I need to obfuscate the package name.
Proguard
# This is a configuration file for ProGuard.
# http://proguard.sourceforge.net/index.html#manual/usage.html
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-verbose
# Optimization is turned off by default. Dex does not like code run
# through the ProGuard optimize and preverify steps (and performs some
# of these optimizations on its own).
-dontoptimize
-dontpreverify
# Note that if you want to enable optimization, you cannot just
# include optimization flags in your own project configuration file;
# instead you will need to point to the
# "proguard-android-optimize.txt" file instead of this one from your
# project.properties file.
-keepattributes *Annotation*
-keep public class com.google.vending.licensing.ILicensingService
-keep public class com.android.vending.licensing.ILicensingService
# For native methods, see http://proguard.sourceforge.net/manual/examples.html#native
-keepclasseswithmembernames class * {
native <methods>;
}
# keep setters in Views so that animations can still work.
# see http://proguard.sourceforge.net/manual/examples.html#beans
-keepclassmembers public class * extends android.view.View {
void set*(***);
*** get*();
}
# We want to keep methods in Activity that could be used in the XML attribute onClick
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}
# For enumeration classes, see http://proguard.sourceforge.net/manual/examples.html#enumerations
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keepclassmembers class * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator CREATOR;
}
-keepclassmembers class **.R$* {
public static <fields>;
}
# The support library contains references to newer platform versions.
# Don't warn about those in case this app is linking against an older
# platform version. We know about them, and they are safe.
-dontwarn android.support.**
# Understand the #Keep support annotation.
-keep class android.support.annotation.Keep
-keep #android.support.annotation.Keep class * {*;}
-keepclasseswithmembers class * {
#android.support.annotation.Keep <methods>;
}
-keepclasseswithmembers class * {
#android.support.annotation.Keep <fields>;
}
-keepclasseswithmembers class * {
#android.support.annotation.Keep <init>(...);
}
-dontwarn org.apache.http.**
-dontnote org.apache.http.**
-dontwarn microsoft.aspnet.signalr.**
-dontwarn okio.**
-dontnote okio.**
-dontnote com.fasterxml.jackson.**
-dontwarn com.fasterxml.jackson.**
-dontwarn com.squareup.picasso.**
-dontwarn android.net.http.AndroidHttpClient
-dontwarn retrofit2.**
-dontwarn okhttp3.**
-dontnote retrofit2.**
-dontnote okhttp3.**
-dontnote android.net.http.**
Build.gradle
debug {
shrinkResources false
debuggable true
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
I have referred to :
Android Archive (AAR) package obfuscation
Android Archive (AAR) package obfuscation
How to obfuscate android library(.aar) using proguard?
Thanks

Where to add Proguard Custom Rules?

I am trying to add custom Proguard rules for my app, but I am not sure into which file I should add those custom rules. I know of three files
1)Android/sdk/tools/proguard/proguard-android.txt
2)Android/sdk/tools/proguard/proguard-project.txt
3)Project --> app --> proguard-rules.pro

First of all you will use the
3)Project --> app --> proguard-rules.pro
and
few generic custom rules which are safe to apply on app and wouldn't
hinder the functioning of it
depends on the code in your app but if you will set minifyEnabled to true(which is recommended) this could lead to a lot of issues which can be solved through proguard rules file.
This is my proguard file for one of my projects where I'm using Fabric, httpApacheClient, shareActionProvider and some other libraries that needs specific rules for proguard.
# This will ignore warnings for missing translations and some other wanrinings
-ignorewarnings
# Keeping line numbers for easy error tracking :
-keepattributes SourceFile,LineNumberTable
# Support ShareActionProvider will not work without this line :
-keep class android.support.v7.widget.ShareActionProvider { *; }
# Flurry Crashlytics
-keep class com.flurry.** { *; }
-dontwarn com.flurry.**
-keepattributes *Annotation*,EnclosingMethod
-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet, int); }
# Preserve Flurry mediation classes for DFP/AdMob Ads ­keep public class com.google.ads.mediation.flurry.**
# Google Play Services library
-keep class * extends java.util.ListResourceBundle {
protected Object[][] getContents(); }
-keep public class com.google.android.gms.common.internal.safeparcel.SafeParcelable {
public static final *** NULL; }
-keepnames #com.google.android.gms.common.annotation.KeepName class *
-keepclassmembernames class * {
#com.google.android.gms.common.annotation.KeepName *; }
-keepnames class * implements android.os.Parcelable { public static final ** CREATOR;
}
-keepattributes InnerClasses, EnclosingMethod
-keep class com.ironsource.mobilcore.**{ *; }
-dontwarn org.apache.http.**
-dontwarn android.net.http.AndroidHttpClient
-dontwarn android.app.Notification
-keep class com.dianxinos.DXStatService.stat.TokenManager {
public static java.lang.String getToken(android.content.Context);
}
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.app.Activity
-keep public class * extends android.content.ContentProvider
And almost you will find related proguard settings in the documentation of any external library you use.

in
3)Project --> app --> proguard-rules.pro
There are not generic proguard rules. All those generic ones already included with SDK, It depends on what features and libraries are you using in your project. Also there is no safeway of doing it. You have to apply rules and test app -> fix any issues then repeat same process.

Proguard doesnt obfuscate Class name, only methods are obfuscated

I try using Proguard in android studio, but seems like Proguard is not obfuscating the class name, for example, my app structure, and the config:
and config
but when i try trigger the exception in the app:
the exception is listed in ADB console:
only the methods are obfuscated, the MainActivity.class is not

This is an expected behaviour because the class is an activity!
All classes that are mentioned in AndroidManifest.xml have to keep their names (activities, services, providers, receivers, application, instrumentation). Otherwise the system won't be able to find them.
Gradle build automatically generates some rules for your ProGuard configuration to achieve this. It scans AndroidManifest.xml and adds rules for each class found there.
If you want to see all the rules that are used, add this line to your ProGuard rules:
-printconfiguration "build/outputs/mapping/configuration.txt"
It will create configuration.txt file containing all the rules.
There should be something like this:
# view AndroidManifest.xml #generated:50
-keep class com.github.browep.proguard.MainActivity {
<init>(...);
}

I was facing the same problems,
After updating my Android plugin for Gradle, Proguard stop obfuscating my utility and other class files.
After few searching, I found that Android studio gradle now uses newer version of Proguard.
And according to this stack-overflow answer, which stated that:
proguard automatically add rules specific for android/google package.
Therefore, After few rule changes in my app, Proguard obfuscated the class names again.
Old proguard-rules.pro:
#support-v4
##link https://stackoverflow.com/questions/18978706/obfuscate-android-support-v7-widget-gridlayout-issue
-dontwarn android.support.v4.**
-keep class android.support.v4.** { *; }
-keep class android.support.v4.app.** { *; }
-keep interface android.support.v4.app.** { *; }
#support-v7
-dontwarn android.support.v7.**
-keep class android.support.v7.** { *; }
#https://stackoverflow.com/a/34895791/4754141
-keep class !android.support.v7.view.menu.**
-keep interface android.support.v7.* { *; }
#support design
##link https://stackoverflow.com/a/31028536
-dontwarn android.support.design.**
-keep class android.support.design.** { *; }
-keep interface android.support.design.** { *; }
-keep public class android.support.design.R$* { *; }
#error : Note: the configuration refers to the unknown class 'com.google.vending.licensing.ILicensingService'
#solution : #link https://stackoverflow.com/a/14463528
-dontnote com.google.vending.licensing.ILicensingService
-dontnote **ILicensingService
#updating to Gradle 2.14.1 caused error : https://stackoverflow.com/q/17141832/4754141
-keepattributes EnclosingMethod
#render script
##link https://stackoverflow.com/questions/22161832/renderscript-support-library-crashes-on-x86-devices
-keepclasseswithmembernames class * { native <methods>; }
-keep class android.support.v8.renderscript.** { *; }
New proguard-rules.pro:
#https://stackoverflow.com/a/41901653/4754141
#https://stackoverflow.com/a/23840049/4754141
-keep class android.support.** { *; }
-keep interface android.support.** { *; }