每次建立新專案都要重新建立jniLibs，很煩（每次都忘了怎麼建立（傻逼！）），無奈之下還是寫一篇部落格以備不時之需

在gradle下配置：

    sourceSets {
        main {
            jniLibs.srcDirs = ['libs']
        }

    }
//    // 或者：
//    sourceSets.main {
//        jniLibs.srcDirs = ['libs']
//        jni.srcDirs = []
//    }

放置一個完整的gradle程式碼

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "24.0.2"
    defaultConfig {
        applicationId "com.yrmao.pinyinsearch"
        minSdkVersion 14
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {
        main {
            jniLibs.srcDirs = ['libs']
        }

    }
//    // 或者：
//    sourceSets.main {
//        jniLibs.srcDirs = ['libs']
//        jni.srcDirs = []
//    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.0.0'
    testCompile 'junit:junit:4.12'
    compile files('libs/pinyin4j-2.5.0.jar')
}