Hello Friends,
A small and sweet post in between all those C, C++ and Python OpenCV Tutorials. I have received several emails from folks who were interested in knowing how to easily install/integrate OpenCV with Android Studio.
The below steps for using Android OpenCV sdk in Android Studio.
- 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/javafolder 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 Dependenciestab. 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 libsfolder. 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.