Develop Reference

How to fix invalid line numbers in Proguard enabled Android release APK?

When Proguard enabled in Android release build, Line numbers will change. This will not happen in Proguard enabled debug build, If exception occurred it is possible to find root cause easily retracing logs on debug application. but in release build line numbers are wrong.
How do I fix this issue?
TargerSDKVersion = 33 | GrdleVersion = 7.1.2
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
debug {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
proguard-rules.pro
-keepattributes SourceFile,LineNumberTable

Android project not obfuscating

I want to obfuscate my android code, I have set minifienable true and setup proguard file, but after generating apk and decompile, the code is not obfuscated. This is my proguard :
my proguard file:
-dontwarn com.huawei.**
-dontwarn org.conscrypt.*
-dontwarn org.openjsse.javax.net.ssl.*
-dontwarn org.openjsse.net.ssl.OpenJSSE
my build.gradle file
buildTypes {
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
debug{
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}

To enable ProGuard in Android Studio. Below is the sample how to enable default ProGuard in Android Studio.
Go to the build.gradle file of app
enable the proguard minifyEnabled true and useProguard true
enable shrinkResources true to reduce the APK size by shrinking resources.
proguardFiles getDefaultProguardFile('proguard-android.txt') to enable the default one. If you want to use your own proguard file then use the below rules.
release
{
debuggable false
useProguard true
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}

delete build file
invalidate cache and restart android studio

My app crashes when using proguard with Hyperledger Iroha

When i try to do minify enabled true in my build.gradle file using below code application is crashed :
Code
buildTypes {
release {
debuggable false
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
debug{
debuggable true
minifyEnabled true
shrinkResources false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
when I did: minifyEnabled true after building release apk: app-release.apk, the app crashed.
when I did: minifyEnabled false after building release apk: app-release.apk, the build is okay.
enter image description here

As indicated ref resource, minifyEnabled will remove unused codes. In your situation, there might be methods which is used with JNI or else and compiler did not known it's used. Again according to ref, you can specify which files to keep from examination of built-in minify (same as proguard).
The answer is here

As given in the error message the classloader was not able to find the class org.apache.xerces.datatype.DatatypeFactoryImpl
Proguard is changing the class name to stop this from happening you can add
-keep class org.apache.**{ *; }
in your progurad-rules.pro file

Add this to proguard
-keep public class jp.co.soramitsu.iroha.android.** {
public protected *;
public private *;
}

Android proguarded apk still readable

I tried to proguard my app. It successfully obfuscated the apk. However, when i try to view the java code of my apk using Apk_oneclick, I am able to. I have created a release version of my apk. Still the problem persist. Any help would be much appreciated.
Thanks in advance.
build.gradle:
Proguard Rules:
Java code from the release-apk:

For enabling ProGuard configurations for your application you need to enable it in your module level gradle file. you need to set the value of minifyEnabled true.
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
You can also enable shrinkResources true which will remove resources that ProGuard flaggs as unused.
buildTypes {
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}

You need to set following property
and add some rules in proguard-android
buildTypes {
release {
debuggable false
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}

Got it working. Cleaned the project and ran the same with some changes in the Proguard rules.

Android debuggable=true with proguard is on

As my project is too large, I need to run proguard in order to compile android successfully.
But when I set android:debuggable="true" in order for me to debug easily, it turn off proguard automatically. Is there any solution or workaround? Thank You

Ran into the exactly same problem. Luckily Google helped me out.
Now my build.gradle:
// ...
android {
// ...
buildTypes {
debug {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'),
'proguard-rules.txt',
'proguard-rules.debug.txt'
debuggable true
}
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'),
'proguard-rules.txt'
}
}
}
proguard-rules.debug.txt:
-renamesourcefileattribute SourceFile
-keepattributes SourceFile,LineNumberTable
-dontobfuscate
-dontoptimize
-dontpreverify
Worked for me. Hope it helps. ;-)