android opencv build.gradle

apply plugin: 'com.android.application'
android {
compileSdkVersion 22
buildToolsVersion "22.0.1"
defaultConfig {
applicationId "com.example.crystal.opencvdemo"
minSdkVersion 15
targetSdkVersion 22
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}

sourceSets.main.jni.srcDirs = []
//禁止自带的ndk功能
sourceSets.main.jniLibs.srcDirs = ['src/main/libs', 'src/main/jniLibs']
//重定向so目录为src/main/libs和src/main/jniLibs，原来为src/main/jniLibs

task ndkBuild(type: Exec, description: 'Compile JNI source with NDK') {
Properties properties = new Properties()
properties.load(project.rootProject.file('local.properties').newDataInputStream())
def ndkDir = properties.getProperty('ndk.dir')

if (org.apache.tools.ant.taskdefs.condition.Os.isFamily(org.apache.tools.ant.taskdefs.condition.Os.FAMILY_WINDOWS)) {
commandLine "$ndkDir/ndk-build.cmd", '-C', file('src/main/jni').absolutePath
} else {
commandLine "$ndkDir/ndk-build", '-C', file('src/main/jni').absolutePath
}
}

tasks.withType(JavaCompile) {
compileTask -> compileTask.dependsOn ndkBuild
compileTask.dependsOn copyNativeLibs
}

//noinspection all
task copyNativeLibs(type: Copy) {
// third party lib so
from(new File(projectDir, 'libs')) { include 'armeabi/*.so' }
into new File(buildDir, 'native-libs')
}

/*    tasks.withType(JavaCompile) {
compileTask ->
//noinspection all
compileTask.dependsOn copyNativeLibs
}*/

//noinspection all
tasks.withType(com.android.build.gradle.tasks.PackageApplication) {
pkgTask ->
pkgTask.jniFolders = new HashSet<File>()
pkgTask.jniFolders.add(new File(buildDir, 'native-libs'))
}

task ndkClean(type: Exec, description: 'Clean NDK Binaries') {
Properties properties = new Properties()
properties.load(project.rootProject.file('local.properties').newDataInputStream())
def ndkDir = properties.getProperty('ndk.dir')

if (org.apache.tools.ant.taskdefs.condition.Os.isFamily(org.apache.tools.ant.taskdefs.condition.Os.FAMILY_WINDOWS)) {
commandLine "$ndkDir/ndk-build.cmd", 'clean', '-C', file('src/main/jni').absolutePath
} else {
commandLine "$ndkDir/ndk-build", 'clean', '-C', file('src/main/jni').absolutePath
}
}

clean.dependsOn 'ndkClean'
}

dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:22.2.1'
compile 'com.android.support:design:22.2.1'
compile files('libs/javacv.jar')
compile files('libs/javacpp.jar')
}