randauto / opencv-android-sample

Sample setup for OpenCV + NDK in Android Studio

OpenCV Example

Based on OpenCV's Tutorial #1.

OpenCV installation

Based on this

1. Download latest OpenCV sdk for Android from OpenCV.org and decompress the zip file.
2. Import OpenCV to Android Studio, From File -> New -> Import Module, choose sdk/java folder in the unzipped opencv archive.
3. Update build.gradle under imported OpenCV module to update 4 fields to match your project build.gradle a) compileSdkVersion b) buildToolsVersion c) minSdkVersion and 4) targetSdkVersion.
4. Add module dependency by Application -> Module Settings, and select the Dependencies tab. Click + icon at bottom, choose Module Dependency and select the imported OpenCV module.
5. For Android Studio v1.2.2, to access to Module Settings : in the project view, right-click the dependent module -> Open Module Settings
6. Copy libs folder under sdk/native to Android Studio under app/src/main.
7. In Android Studio, rename the copied libs directory to jniLibs and we are done.

Setup NDK

Download and install Android's Native Development Kit (NDK). More info here: https://developer.android.com/ndk/guides/setup.html

Notes

This project uses the gradle experimental plugin, so it is subject to change.

Your local.properties file must define the ndk and opencv dirs. Here's mine as an example

sdk.dir=~/Library/Android/sdk
ndk.dir=/usr/local/android-ndk-r10e
opencv.dir=~/dev/androidstudio/OpenCV-android-sdk/sdk/native/jni/include