If you already use Android Studio or have downloaded the SDK: Open your SDK root directory. Navigate to the build-tools folder.
If you see compilation errors stating that standard Android classes or Java 8 features cannot be resolved, you missed specifying the platform library.
git clone https://r8.googlesource.com/r8 cd r8 tools/gradle.py d8 Use code with caution. Copied to clipboard The output will be located at build/libs/d8.jar .
If you are working on a headless Linux server or prefer the terminal, download the official command-line tools from the Android Developer portal:
An exhaustive, step-by-step technical guide on how to download, locate, and use the D8 dex compiler ( d8.jar ) for Android development.