ndk-rust

Android NDK and Rust with Bazel example

Setup

1. Install latest Android Studio
2. Install correct build-tools with sdkmanager "build-tools;30.0.3"
3. Install correct NDK with sdkmanager "ndk;21.4.7075529"
4. Setup ANDROID_HOME to point to installation directory, e.g. on OSX: export ANDROID_HOME="$HOME/Library/Android/sdk".
5. Setup ANDROID_NDK_HOME to point to the right NDK, e.g. export ANDROID_NDK_HOME="$ANDROID_HOME/ndk/21.4.7075529"

Building the APK

Running:

bazel build //:ndk_rust --sandbox_debug --verbose_failures --test_output=streamed --fat_apk_cpu=armeabi-v7a,arm64-v8a,x86,x86_64

builds an APK with a rust shared library with the chosen architectures:

$ zipinfo bazel-bin/ndk_rust.apk | head -6
Archive:  bazel-bin/ndk_rust.apk
Zip file size: 6218745 bytes, number of entries: 350
-rw----     2.0 fat  4385888 b- defN 10-Jan-01 00:00 lib/arm64-v8a/libndk_rust_jni.so
-rw----     2.0 fat  3921056 b- defN 10-Jan-01 00:00 lib/armeabi-v7a/libndk_rust_jni.so
-rw----     2.0 fat  3884392 b- defN 10-Jan-01 00:00 lib/x86/libndk_rust_jni.so
-rw----     2.0 fat  4379960 b- defN 10-Jan-01 00:00 lib/x86_64/libndk_rust_jni.so