Android Studio and openimaj

Question

I am currently trying to build an android studio project using a dependency from the openimaj Java library.

apply plugin: 'com.android.application'

android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "com.example.mapinguari.myapplication"
        minSdkVersion 15
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.2.0'
    compile 'org.openimaj:openimaj:1.3.1'
}

Is my module build file. It reports no errors when syncing to the IDE.

However when I try to construct any of the classes in one of the source files the Android Studio does not recognize any of the classes from the openimaj dependency.

Any Help much appreciated.

Thank you!

Jon · Accepted Answer · 2015-11-05T12:27:26.387

I think it might be because you've specified a non-jar OpenIMAJ dependency (specifically you've told it to link against the OpenIMAJ master pom file, which only contains references to the different sub-modules). You probably need to actually choose the specific modules that you want - for example if your application is doing image processing, then add the dependency org.openimaj:image-processing:1.3.1.

Edit: It seems that the batik svg libraries have a circular dependency somewhere that breaks Gradle (see https://issues.apache.org/jira/browse/BATIK-1098). This is what causes an eventual StackOverflowError. Additionally, something is pulling in xml-apis which will conflict with Android. Assuming you don't mind not have SVG image support, then the following should work:

repositories {
    mavenCentral()
    maven {
        url "http://maven.openimaj.org"
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:18.+'
    compile('org.openimaj:image-processing:1.3.1') {
        exclude group: 'org.apache.xmlgraphics'
        exclude group: 'xml-apis'
    }
}

You might also want to add additional exclusions for dependencies that are not needed in your app - it seems that just including org.openimaj:image-processing pulls in lots of things that are almost certainly not going to be needed (I've created an issue for that here: https://github.com/openimaj/openimaj/issues/97).

Hi Jon, I thought that might be the case, however if I try to add a specific dependency, i.e. core-image, I get an "Error:Failed to notify project evaluation listener". If I check out the logs I am getting a loop in the dependency resolution. — TiPi, Nov 03 '15 at 20:18
Hmm, can you try adding the openimaj maven repository: http://maven.openimaj.org See http://stackoverflow.com/questions/20574111/add-maven-repository-to-build-gradle for how to do it — Jon, Nov 03 '15 at 23:06
Hi Jon. I tried adding the repo that you mention and also tried the snapshots repo after. I am fairly sure I have done this correctly as the modules such as core, and core-audio both sync. But core-image and several others do not. — TiPi, Nov 04 '15 at 19:05
I've just updated the answer after having done a few experiments for myself. It seemed that there were two issues that were stopping it working properly. — Jon, Nov 05 '15 at 12:29
Amazing, it seems to be happy with dependencies now. I'll work through other problems. Cheers! — TiPi, Nov 06 '15 at 10:35

Android Studio and openimaj

1 Answers1