A Color-to-grayscale Android app using Android NDK r12b under Android Studio 2.1.2 with OpenCV 3.1.0 Android SDK.
如果您懂中文,欢迎来阅读我的文章http://johnhany.net/2016/07/opencv-3-1-ndk-dev-on-android-studio-2/
Gradle version 2.10 Gradle Android Plugin 2.1.2
Android development requires JDK environment.
Test passed on x86 target-arch.
I'm only using OpenCV JNI. OpenCV Java API is not required.
Directly downloaded inside Android Studio.
OpenCV3JNI is released under the MIT license.