工程大了Moudle开始多了之后导包量也跟着增大，稍不注意容易重复导包，或者导包版本不一致，开发中经常遇到这个问题。这里为大家推荐 kotlin+buildSrc 依赖包管理方式，实现依赖包统一管理的同时甚至支持自动补全，使用起来也非常简单。
废话少说：
步骤1：
首先要集成Kotlin，AndroidStudio3.0以后自动集成，生成项目时勾选即可，之前的版本下载插件。
步骤二:
2.1.新建目录 buildSrc 与app同级
2.2 新建文件 build.gradle.kts 如下，同步gradle
plugins{
`kotlin-dsl`
}
2.3.如目录新建 Dependencies.kt （自定义）文件，完成之后build下
/**
* 版本
*/
object Versions {
val compileSdkVersion =27
val minSdkVersion =19
val targetSdkVersion =27
val versionCode =1
val versionName ="v1.0.0"
val support_lib ="27.1.0"
val retrofit ="2.3.0"
val rxjava ="2.1.9"
val constraint ="1.0.2"
}
/**
* app
*/
object App {
val applicationId ="chinamobile.iot.mykotlinbuilddemo"
}
/**
* 依赖包
*/
object Libs {
val constraint_layout ="com.android.support.constraint:constraint-layout:${Versions.constraint}"
val support_annotations ="com.android.support:support-annotations:${Versions.support_lib}"
val support_appcompat_v7 ="com.android.support:appcompat-v7:${Versions.support_lib}"
val support_v4 ="com.android.support:support-v4:${Versions.support_lib}"
val retrofit ="com.squareup.retrofit2:retrofit:${Versions.retrofit}"
val retrofit_rxjava_adapter ="com.squareup.retrofit2:adapter-rxjava2:${Versions.retrofit}"
val rxjava ="io.reactivex.rxjava2:rxjava:${Versions.rxjava}"
}
步骤三：在Moudle下build.gradle中引用
applyplugin:'com.android.application'
applyplugin:'kotlin-android'
applyplugin:'kotlin-android-extensions'
android {
compileSdkVersion Versions.compileSdkVersion
defaultConfig {
applicationId App.applicationId
minSdkVersion Versions.minSdkVersion
targetSdkVersion Versions.targetSdkVersion
versionCode Versions.versionCode
versionName Versions.versionName
testInstrumentationRunner"android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabledfalse
proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(include: ['*.jar'],dir:'libs')
implementation Libs.support_annotations
implementation Libs.support_appcompat_v7
implementation Libs.constraint_layout
}
这里应用和代码中直接引用静态常量一样，可补全可查看，非常简洁直观。
注意：kotlin依赖放到Project/build.gradle中
dependencies {
classpath'com.android.tools.build:gradle:3.1.3'
classpath"org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
Demo地址：https://github.com/AndroidxXiaobai/BuildSrcDemo
