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Do I need to remove Proguard related code from Gradle when using R8?
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
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R8 differs from proguard in the following ways: R8 has higher Kotlin language support as compared to proguard. Proguard is mainly used by applications developed using Java. Usually, the R8 compiler is much faster than the proguard compiler.
To enable R8 shrinking in your application, set the minifyEnabled to true in your app's main build. gradle file.
It reduces the size of the application. It removes the unused classes and methods that contribute to the 64K method counts limit of an Android application. It makes the application difficult to reverse engineer by obfuscating the code.
In summary, ProGuard has the following effect on our project: It shrinks the application's size. It removes unused classes and methods that contribute to an Android application's 64K method count limit. By obfuscating the code, it makes it difficult to reverse engineer the application.
You don't actually remove the proguard rules, as R8 works with Proguard rules in compat mode. For more details, please refer to https://android-developers.googleblog.com/2018/11/r8-new-code-shrinker-from-google-is.html.
R8 is available with Android Studio 3.3 beta and works with Proguard rules. To try it, set the following in your project's
gradle.propertiesfile:android.enableR8=true
But for the full mode, it is not directly compatible with Proguard.
Edit #1
Check here for how to migrate Proguard to R8: Android/java: Transition / Migration from ProGuard to R8?
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