Gradle配置:Android Library打包至Maven倉庫
開發Android Library專案,需要把aar包給商戶app接入,如果按照原始的方法手動給包的話,那就太low了。而且Library中dependencies和proguard等都要商戶app再寫一遍,這實在是和low,對於商戶來說,其實只要一句簡單的程式碼就好了。
compile 'xxx.xx.xx:xxx:3.x'
先直接上程式碼:
project下的build.gradle:
buildscript {
repositories {
jcenter()
maven { url "https://plugins.gradle.org/m2/" }
}
dependencies {
classpath 'com.android.tools.build:gradle:2.1.3'
classpath "org.jfrog.buildinfo:build-info-extractor-gradle:4.4.10"
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
library的build.gradle:
apply plugin: 'com.android.library'
apply plugin: 'com.jfrog.artifactory'
apply plugin: 'maven-publish'
android {
publishNonDefault true
compileSdkVersion 23
buildToolsVersion '23.0.3'
defaultConfig {
minSdkVersion 14
targetSdkVersion 23
//在打包的aar中加入proguard檔案
consumerProguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
debug{
}
}
libraryVariants.all { variant ->
variant.outputs.each { output ->
def outputFile = output.outputFile
if (outputFile != null && outputFile.name.endsWith('.aar')) {
def fileName = getArtifactFileName()
output.outputFile = new File(outputFile.parent, fileName)
}
}
}
}
dependencies {
compile 'com.android.support:support-v4:23.0.1'
compile 'de.greenrobot:eventbus:2.4.0'
compile files('libs/other-library.jar')
}
repositories {
maven {
url "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
}
}
publishing {
publications {
aar(MavenPublication) {
groupId = GROUP
artifactId POM_ARTIFACT_ID
version = VERSION_NAME
artifact "${project.buildDir}/outputs/aar/${getArtifactFileName()}"
//generate POM file
pom.withXml {
def root = asNode()
def dependenciesNode = root.appendNode('dependencies')
def repositoriesNode = root.appendNode('repositories')
//Iterate over the compile dependencies (we don't want the test ones), adding a <dependency> node for each
configurations.compile.allDependencies.each {
if (it.group != null) {
def dependencyNode = dependenciesNode.appendNode('dependency')
dependencyNode.appendNode('groupId', it.group)
dependencyNode.appendNode('artifactId', it.name)
dependencyNode.appendNode('version', it.version)
}
}
//add the repositories exclude local repositories,such as file:/D:/AndroidSDK/extras/android/m2repository/
project.repositories.each {
if (!it.url.toString().startsWith('file')) {
def repositoryNode = repositoriesNode.appendNode('repository')
repositoryNode.appendNode('url', it.url)
repositoryNode.appendNode('name', it.name)
repositoryNode.appendNode('releases').appendNode("enabled",true)
repositoryNode.appendNode('snapshots').appendNode("enabled",false)
}
}
}
}
}
}
artifactory {
contextUrl = REPOSITORY_URL
publish {
repository {
// The Artifactory repository key to publish to
repoKey = VERSION_NAME.contains("SNAPSHOT") ? SNAPSHOT_REPOSITORY_KEY : RELEASE_REPOSITORY_KEY
username = ARTIFACTORY_USERNAME
password = ARTIFACTORY_PASSWORD
}
defaults {
// Tell the Artifactory Plugin which artifacts should be published to Artifactory.
publications('aar')
publishArtifacts = true
// Properties to be attached to the published artifacts.
properties = ['build.status': "$it.project.status".toString()]
publishPom = true
publishIvy = false
}
}
}
def getArtifactFileName() {
return "${POM_ARTIFACT_ID}-${VERSION_NAME}.aar"
}
//在執行artifactoryPublish之前需要生成上傳Maven倉庫的Pom文件。
artifactoryPublish {}.dependsOn(getTasks().getByPath(":sdk:generatePomFileForAarPublication"))
gradle.properties:
#artifactory configs
VERSION_NAME=3.7.0-SNAPSHOT
#VERSION_NAME=3.7.0
VERSION_CODE=31
GROUP=com.example.yourproject
POM_ARTIFACT_ID=libraryname
POM_NAME=libraryname
POM_PACKAGING=aar
#你要上傳的maven倉庫地址
REPOSITORY_URL=http://mvn.hz.com/artifactory
#倉庫的具體兩個小位置,一個是snapshot和releases,這兩個的區別自行上網查詢。snapshot是快照,可以存放用於測試的包,release就是正式釋出的包
SNAPSHOT_REPOSITORY_KEY=libs-snapshots
RELEASE_REPOSITORY_KEY=libs-releases
#在gradle.properties中增加string變數不需要'或者",直接填寫內容即可。這兩個變數是上傳maven倉庫的賬戶和密碼,在我的例子中上傳不需要賬戶密碼,就置為空了
ARTIFACTORY_USERNAME=
ARTIFACTORY_PASSWORD=
程式碼已上完,分批來看下:
apply plugin: 'com.jfrog.artifactory'
apply plugin: 'maven-publish'
這裡是我們要使用的外掛,主要使用這兩個外掛來上傳至maven倉庫。
consumerProguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
這句是在打的包中加入混淆規則,這樣商戶app在接入的時候,不用再去關心你的library的混淆規則。如果你不加這句,那麼你要告訴你商戶app要keep住哪些。。。
libraryVariants.all { variant ->
variant.outputs.each { output ->
def outputFile = output.outputFile
if (outputFile != null && outputFile.name.endsWith('.aar')) {
def fileName = getArtifactFileName()
output.outputFile = new File(outputFile.parent, fileName)
}
}
}
def getArtifactFileName() {
return "${POM_ARTIFACT_ID}-${VERSION_NAME}.aar"
}
這句只是修改每次編譯生成的aar包的名字。上述兩部分組成。
下面分兩部分,第一步是生成pom文件和aar包。第二部是將pom和aar包上傳至maven倉庫。
先看下第一步
publishing {
publications {
aar(MavenPublication) {
groupId = GROUP
artifactId POM_ARTIFACT_ID
version = VERSION_NAME
artifact "${project.buildDir}/outputs/aar/${getArtifactFileName()}"
//generate POM file
pom.withXml {
def root = asNode()
def dependenciesNode = root.appendNode('dependencies')
def repositoriesNode = root.appendNode('repositories')
//Iterate over the compile dependencies (we don't want the test ones), adding a <dependency> node for each
configurations.compile.allDependencies.each {
if (it.group != null) {
def dependencyNode = dependenciesNode.appendNode('dependency')
dependencyNode.appendNode('groupId', it.group)
dependencyNode.appendNode('artifactId', it.name)
dependencyNode.appendNode('version', it.version)
}
}
//add the repositories exclude local repositories,such as file:/D:/AndroidSDK/extras/android/m2repository/
project.repositories.each {
if (!it.url.toString().startsWith('file')) {
def repositoryNode = repositoriesNode.appendNode('repository')
repositoryNode.appendNode('url', it.url)
repositoryNode.appendNode('name', it.name)
repositoryNode.appendNode('releases').appendNode("enabled",true)
repositoryNode.appendNode('snapshots').appendNode("enabled",false)
}
}
}
}
}
}
這裡會生成pom文件,pom主要就是對你的library的一個描述,看個例子:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example.yourproject</groupId>
<artifactId>libraryname</artifactId>
<version>3.7.0-SNAPSHOT</version>
<packaging>aar</packaging>
<dependencies>
<dependency>
<groupId>com.android.support</groupId>
<artifactId>support-v4</artifactId>
<version>23.0.1</version>
</dependency>
<dependency>
<groupId>de.greenrobot</groupId>
<artifactId>eventbus</artifactId>
<version>2.4.0</version>
</dependency>
</dependencies>
<repositories>
<repository>
<url>https://jcenter.bintray.com/</url>
<name>BintrayJCenter</name>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>
所以在我們的例子中加入了library依賴的dependency和repository。如果不加dependency的話,在商戶app中需要再加入library的依賴項。
!!!!但是!!!!加入repository好像沒用,我依舊要在商戶app中加入repository,目前還沒找到為什麼,讀者若知道和我說下!!!!
生成aar的話,就呼叫gradle的assembleRelease就好了。
第二步上傳至maven:
artifactory {
contextUrl = REPOSITORY_URL
publish {
repository {
// The Artifactory repository key to publish to
repoKey = VERSION_NAME.contains("SNAPSHOT") ? SNAPSHOT_REPOSITORY_KEY : RELEASE_REPOSITORY_KEY
username = ARTIFACTORY_USERNAME
password = ARTIFACTORY_PASSWORD
}
defaults {
// Tell the Artifactory Plugin which artifacts should be published to Artifactory.
publications('aar')
publishArtifacts = true
// Properties to be attached to the published artifacts.
properties = ['build.status': "$it.project.status".toString()]
publishPom = true
publishIvy = false
}
}
}
其實也很簡單,就是指明倉庫地址,賬戶密碼,型別等就好了。
這時候sync下你的程式碼,會發現在gradle task中多了幾個task。
artifactoryPublish就是上傳aar到maven中,也就是我們剛剛說的第二步。
generatePomFileForAarPublication就是生成pom文件,也就是我們剛剛說的第一步。
後面三個我就不太清楚具體是幹嘛的。
如果你直接執行artifactoryPublish的話,可能會出錯,因為你可能還沒生成pom文件。所以我在build.gradle中加了一句依賴:
//在執行artifactoryPublish之前需要生成上傳Maven倉庫的Pom文件。
artifactoryPublish {}.dependsOn(getTasks().getByPath(":sdk:generatePomFileForAarPublication"))
這句話的意思就是在執行artifactoryPublish任務之前,需要執行generatePomFileForAarPublication。這樣就不會出錯了。
好了,現在雙擊artifactoryPublish任務進行上傳,看下結果:
下面給出了引用的程式碼:
compile(group: 'com.example.yourproject', name: 'libraryname', version: '3.7.0-20161213.023523-29', ext: 'aar')
好了,在商戶app中只用加入這一句就好了。
加入之後,build之後你會發現剛剛library專案中的eventbus和support庫都會自動導進來了,而商戶app中卻不用宣告,是否很簡單易用呢?
接下來講下遇到的坑吧:
1.pom檔案中配置的repository不管用,就是說pom中的依賴項並不從我配置的repositories中尋找,所以別人加入你的aar的話,還需要在build.gradle中加入你使用的倉庫。
2.在repository節點中,有個屬性叫做updatePolicy,updatePolicy更新snapshot包的頻率,屬性有四個值always(實時更新) daily(每天更新) interval:xxx(隔xxx分鐘更新一次) never(從不更新) 預設為daily ,如果repository節點不起作用的話,那麼policy不起作用的話,如何你不更新版本號就在原來的版本上釋出的話,可能會拉取不到最新的包。
目前看到一種解決辦法是隻需執行一下mvn clean install 即可完成依賴更新,完成以上操作可完成無需更改版本釋出,依賴方也不需要更改pom。