The below steps for using Android OpenCV sdk in Android Studio. This is a simplified version of this(1) SO answer.
- Download latest OpenCV sdk for Android from OpenCV.org and decompress the zip file.
- Import OpenCV to Android Studio, From File -> New -> Import Module, choose sdk/java folder in the unzipped opencv archive.
- Update build.gradle under imported OpenCV module to update 4 fields to match your project build.gradle a) compileSdkVersion b) buildToolsVersion c) minSdkVersion and d) targetSdkVersion.
- 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.
- For Android Studio v1.2.2, to access to Module Settings :
in the project view, right-click the dependent module
-> Open Module Settings
- Copy libs folder under sdk/native to Android Studio under app/src/main.
- In Android Studio, rename the copied libs directory to jniLibs and we are done.
Step (6) is since Android studio expects native libs in app/src/main/jniLibs
instead of older libs
folder. For those new to Android OpenCV, don't miss below steps
- include
static{ System.loadLibrary("opencv_java"); }
(Note: for OpenCV version 3 at this step you should instead load the library opencv_java3
.)
- For step(5), if you ignore any platform libs like x86, make sure your device/emulator is not on that platform.
OpenCV written is in C/C++. Java wrappers are
- Android OpenCV SDK - OpenCV.org maintained Android Java wrapper. I suggest this one.
- OpenCV Java - OpenCV.org maintained auto generated desktop Java wrapper.
- JavaCV - Popular Java wrapper maintained by independent developer(s). Not Android specific. This library might get out of sync with OpenCV newer versions.