How to Use OpenCV in Android Studio

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本文提供了一套完整的指南，在Android Studio中整合并配置OpenCV库，包括创建目录结构、复制SDK文件、调整build.gradle文件、设置依赖项、创建jniLibs目录并复制.so文件等关键步骤。

How to Use OpenCV in Android Studio

Create a libraries folder underneath your project main directory. For example, if your project is OpenCVExamples, you would create a OpenCVExamples/libraries folder.
Go to the location where you have SDK "\OpenCV-2.4.8-android-sdk\sdk" here you will find the java folder, rename it to opencv.
Now copy the complete opencv directory from the SDK into the libraries folder you just created.

Now create a build.gradle file in the opencv directory with the following contents

apply plugin: 'android-library'

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.9.+'
    }
}

android {
    compileSdkVersion 19
    buildToolsVersion "19.0.1"

    defaultConfig {
        minSdkVersion 8
        targetSdkVersion 19
        versionCode 2480
        versionName "2.4.8"
    }

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            res.srcDirs = ['res']
            aidl.srcDirs = ['src']
        }
    }
}

Edit your settings.gradle file in your application’s main directory and add this line:
```
include ':libraries:opencv'
```
Sync your project with Gradle and it should looks like this
Right click on your project then click on the Open Module Settings then Choose Modules from the left-hand list, click on your application’s module, click on the Dependencies tab, and click on the + button to add a new module dependency.
Choose Module dependency. It will open a dialog with a list of modules to choose from; select “:libraries:opencv”.
Create a jniLibs folder in the /app/src/main/ location and copy the all the folder with *.so files (armeabi, armeabi-v7a, mips, x86) in the jniLibs from the OpenCV SDK.
Click OK. Now everything done, go and enjoy with OpenCV.
链接：http://answers.opencv.org/question/14546/how-to-work-with-opencv4android-in-android-studio/