在jni目錄下創(chuàng)建Android.mk文件，在module/build.gradle中關(guān)聯(lián)配置，如下

module/build.gradle的內(nèi)容

apply?plugin:?'com.android.application'

android?{
????compileSdkVersion?26
????defaultConfig?{
????????applicationId?"com.example.sun.jnidemo"
????????minSdkVersion?15
????????targetSdkVersion?26
????????versionCode?1
????????versionName?"1.0"
????????testInstrumentationRunner?"android.support.test.runner.AndroidJUnitRunner"

????????ndk{
????????????abiFilters?"armeabi","armeabi-v7a"
????????}
????}
????externalNativeBuild{
????????ndkBuild{
????????????path?"src/main/jni/Android.mk"
????????}
????}
????buildTypes?{
????????release?{
????????????minifyEnabled?false
????????????proguardFiles?getDefaultProguardFile('proguard-android.txt'),?'proguard-rules.pro'
????????}
????}
}

dependencies?{
????implementation?fileTree(dir:?'libs',?include:?['*.jar'])
????implementation?'com.android.support:appcompat-v7:26.1.0'
????implementation?'com.android.support.constraint:constraint-layout:1.0.2'
????testImplementation?'junit:junit:4.12'
????androidTestImplementation?'com.android.support.test:runner:1.0.1'
????androidTestImplementation?'com.android.support.test.espresso:espresso-core:3.0.1'
}

Android.mk文件的內(nèi)容

LOCAL_PATH?:=?$(call?my-dir)

include?$(CLEAR_VARS)

LOCAL_MODULE????:=?hello
LOCAL_SRC_FILES?:=?Hello.cpp

#?for?logging
LOCAL_LDLIBS????+=?-llog

include?$(BUILD_SHARED_LIBRARY)