Write an opencv android app using jruby

Download opencv lib

Download lib from http://sourceforge.net/projects/opencvlibrary/files/opencv-android/2.4.8/ Unzip the files

Setup ruboto project

use Ruboto CLI to create a new project

ruboto gen app -t 15 --package org.ruboto.example.opencv

Add the opencv project into the project.properties

android.library.reference.1=../OpenCV-2.4.8-android-sdk/sdk/java 

Add following import lines into the Activity file:

import 'org.opencv.android.BaseLoaderCallback'
import 'org.opencv.android.CameraBridgeViewBase.CvCameraViewFrame'
import 'org.opencv.android.LoaderCallbackInterface'
import 'org.opencv.android.OpenCVLoader'

Now you can run following command to build the app and check if the OpenCV Lib is imported correctly.

rake install start

Start from here to write the awesome OpenCV App using ruby

Now we can start to write the app.

Trouble Shooting

missing build.xml

Seems the new android version require build.xml, so just copy this file from other project and change the project name in it.

Failure [INSTALLFAILEDALREADY_EXISTS]

use the adb command to delete the existed app:

adb uninstall org.ruboto.ruanwz.opencv_demo