Oboe is a native library written in C++ which uses the Android NDK. To move data from Java to C++ you can use JNI.
That said, if you are generating your audio in Java you'll get better performance using the Java AudioTrack class. This can be created with low latency using the AudioTrack.Builder method setPerformanceMode(AudioTrack.PERFORMANCE_MODE_LOW_LATENCY).
You can dynamically tune the latency of the stream just like in Oboe using setBufferSizeInFrames(int) Also you can use blocking writes with the Java AudioTrack and still get a low latency stream. Oboe requires a callback to get a low latency stream and that does not work well with Java.
Note that AudioTrack.PERFORMANCE_MODE_LOW_LATENCY was added in API 26, For API 24 or 25 use AudioAttributes.FLAG_LOW_LATENCY. That was deprecated but will still work with later APIs.
Oboe only works with PCM data. It does not include any extraction or decoding classes. For this you can use:
NdkMediaExtractor and NdkMediaCodec - they're approximately 10X slower than FFmpeg but ship with Android. Code sample here.If you don't need the lowest possible audio latency you may want to investigate using the following Java/Kotlin APIs which support playback of compressed audio files:
Start by ensuring that your project builds successfully. The main thing to do is ensure that the Oboe include paths are set correctly in your project's CMakeLists.txt. Full instructions here.
If that doesn't fix it try the following:
$HOME/Library/Caches/AndroidStudio<version>We have had several reports of this happening and are keen to understand the root cause. If this happens to you please file an issue with your Android Studio version and we'll investigate further.
Please ask questions on Stack Overflow with the Oboe tag.