Hey there! I know dealing with compatibility hiccups after tooling upgrades can be super frustrating—let’s walk through solid solutions for your problem, since the old android.enableD8=false fix is no longer supported.

1. Upgrade Okio to a D8-Compatible Version #

The core issue here is an incompatibility between older Okio releases and the D8 dex compiler. The specific problem you’re facing was resolved in later Okio versions, so this is the most straightforward fix.

Update your Okio dependency in your app-level build.gradle (or build.gradle.kts) to a version that plays nice with D8. Here are safe options depending on your OkHttp version:

// For OkHttp 3.x (uses Okio 1.x)
implementation 'com.squareup.okio:okio:1.17.6'

// For OkHttp 4.x+ (requires Okio 2.x+)
implementation 'com.squareup.okio:okio:2.10.0'

Make sure your Okio version aligns with your OkHttp version—mismatches can trigger extra compatibility headaches.

2. Add ProGuard/R8 Rules (If You Can’t Upgrade Right Now) #

If you’re stuck on an older Okio version temporarily, you can add targeted ProGuard/R8 rules to stop the compiler from stripping critical Okio classes that cause the error. Add these lines to your proguard-rules.pro file:

-keep class okio.Okio { *; }
-keep class okio.AsyncTimeout$Watchdog { *; }
-keep class okio.AsyncTimeout$1 { *; }

These rules protect the exact classes that were known to clash with D8 in older Okio builds.

3. Verify OkHttp and Okio Version Compatibility #

Double-check that your OkHttp dependency is fully compatible with the Okio version you’re using. Mismatched versions can amplify D8-related issues. For quick reference:

• OkHttp 3.14.x → Okio 1.17.x
• OkHttp 4.0.x+ → Okio 2.x+

If you’re using OkHttp, you can let Gradle auto-resolve the correct Okio version by just declaring the OkHttp dependency, but explicitly specifying a compatible Okio version can help avoid hidden conflicts.

Why android.enableD8=false Doesn’t Work Anymore #

D8 has been the default dex compiler for Android projects since Android Studio 3.0, and the android.enableD8 flag was deprecated in later updates. Disabling it isn’t a sustainable fix, as Google has phased out support for the old DX compiler entirely.

内容的提问来源于stack exchange，提问作者Abhay Koradiya