依赖版本管理有多种方式
- config.gradle
用于Groovy DSL，新建一个 config.gradle 文件，然后将项目中所有依赖写在里面，更新只需修改 config.gradle文件内容，作用于所有module
- buildSrc
可用于Kotlin DSL或Groovy DSL，对于多项目构建，只有一个 buildSrc 目录，该目录必须位于根项目目录中，Gradle 会自动编译并测试目录代码
- version catalog
可用于Kotlin DSL或Groovy DSL，与config.gradle类似，缺点是要求gradle版本在7.4.2以上
这里只介绍config.gradle和version catalog
一.原gradle
1.Groovy DSL：
plugins {id 'com.android.application'
}android {namespace 'com.example.myapplication'compileSdk 34defaultConfig {applicationId "com.example.myapplication"minSdk 24targetSdk 33versionCode 1versionName "1.0"testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"}buildTypes {release {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'}}compileOptions {sourceCompatibility JavaVersion.VERSION_1_8targetCompatibility JavaVersion.VERSION_1_8}buildFeatures {viewBinding true}
}dependencies {implementation 'androidx.appcompat:appcompat:1.6.1'implementation 'com.google.android.material:material:1.11.0'implementation 'androidx.constraintlayout:constraintlayout:2.1.4'implementation 'androidx.navigation:navigation-fragment:2.5.3'implementation 'androidx.navigation:navigation-ui:2.5.3'testImplementation 'junit:junit:4.13.2'androidTestImplementation 'androidx.test.ext:junit:1.1.5'androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
}2.Kotlin DSL：
plugins {id("com.android.application")id("org.jetbrains.kotlin.android")
}android {namespace = "com.example.myapplication"compileSdk = 33defaultConfig {applicationId = "com.example.myapplication"minSdk = 24targetSdk = 33versionCode = 1versionName = "1.0"testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"}buildTypes {release {isMinifyEnabled = falseproguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"),"proguard-rules.pro")}}compileOptions {sourceCompatibility = JavaVersion.VERSION_1_8targetCompatibility = JavaVersion.VERSION_1_8}kotlinOptions {jvmTarget = "1.8"}buildFeatures {viewBinding = true}
}dependencies {implementation("androidx.core:core-ktx:1.9.0")implementation("androidx.appcompat:appcompat:1.6.1")implementation("com.google.android.material:material:1.11.0")implementation("androidx.constraintlayout:constraintlayout:2.1.4")implementation("androidx.navigation:navigation-fragment-ktx:2.5.3")implementation("androidx.navigation:navigation-ui-ktx:2.5.3")testImplementation("junit:junit:4.13.2")androidTestImplementation("androidx.test.ext:junit:1.1.5")androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
}二.config.gradle
1.先在根目录创建config.gradle文件
2.根据自己的依赖情况填写config.gradle
在config.gradle中我们还可以定义方法，做到某些关键字可以动态定义，假设我们有多buildTypes的应用，我们可以通过这种方式输出不同的版本名称，版本号等等。
ext {AppDemoDebug = "debug"AppDemoRelease = "release"versionCode = 1android = [applicationId : "com.example.myapplication",compileSdk : 34,minSdk : 24,targetSdk : 33,versionCode : versionCode,versionName : getVersionName(),testInstrumentationRunner: "androidx.test.runner.AndroidJUnitRunner",]version = [material : "1.11.0",core : "1.9.0",appcompat : "1.6.1",constraintlayout: "2.1.4",navigation : "2.5.3",navigation_ui : "2.5.3",junit : "4.13.2",test_ext : "1.1.5",espresso : "3.5.1"]dependencies = [material : "com.google.android.material:material:$version.material",core : "androidx.core:core-ktx:$version.core",appcompat : "androidx.appcompat:appcompat:$version.appcompat",constraintLayout: "androidx.constraintlayout:constraintlayout:$version.constraintLayout",navigation : "androidx.navigation:navigation-fragment-ktx:$version.navigation",navigation_ui : "androidx.navigation:navigation-ui-ktx:$version.navigation_ui",test_junit : "junit:junit:$version.junit",test_ext : "androidx.test.ext:junit:$version.test_ext",test_espresso : "androidx.test.espresso:espresso-core:$version.espresso",]
}def getVersionName() {String taskName = getGradle().getStartParameter().getTaskRequests().toString()if (taskName.contains(AppDemoDebug)) {return versionCode + "_" + releaseTime() + "_DEBUG"} else {return versionCode + "_" + releaseTime() + "_RELEASE"}
}static def releaseTime() {return new Date().format("yyyyMMdd", TimeZone.getTimeZone("UTC"))
}3.对内容进行关联
在项目层级的build.gradle中增加 apply from:"config.gradle"
如果config.gradle内存书写有错误，则会在这个时候报错，根据错误内容修改文件就行了
4.对内容进行引用
引用后的build.gradle文件，可以对照前面的Groovy DSL，所有的版本号和依赖都引用了config.gradle，以此进行统一管理。
但是有明显的缺点是
- 点击无法跳转到config.gradle对应关键字。
- 依赖没有升级提示。
优点就是可以动态定义版本名称等。
//file:noinspection DependencyNotationArgument
plugins {id 'com.android.application'
}android {namespace rootProject.ext.android.applicationIdcompileSdk rootProject.ext.android.compileSdkdefaultConfig {applicationId rootProject.ext.android.applicationIdminSdk rootProject.ext.android.minSdktargetSdk rootProject.ext.android.targetSdkversionCode rootProject.ext.android.versionCodeversionName rootProject.ext.android.versionNametestInstrumentationRunner rootProject.ext.android.testInstrumentationRunner}buildTypes {release {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'}}compileOptions {sourceCompatibility JavaVersion.VERSION_1_8targetCompatibility JavaVersion.VERSION_1_8}buildFeatures {viewBinding true}
}dependencies {implementation rootProject.ext.dependencies.appcompatimplementation rootProject.ext.dependencies.materialimplementation rootProject.ext.dependencies.constraintLayoutimplementation rootProject.ext.dependencies.navigationimplementation rootProject.ext.dependencies.navigation_uitestImplementation rootProject.ext.dependencies.test_junitandroidTestImplementation rootProject.ext.dependencies.test_extandroidTestImplementation rootProject.ext.dependencies.test_espresso
}三.version catalog
1.在gradle目录下创建libs.versions.toml文件
2.根据自己的依赖情况填写libs.versions.toml
[versions]
#plugins-version
application = "8.1.3"
kotlin = "1.9.0"
#config-version
applicationId = "com.example.myapplication"
compileSdk = "34"
minSdk = "24"
targetSdk = "33"
versionCode = "1"
versionName = "1.0"
#dependence-version
material = '1.11.0'
core = '1.9.0'
appcompat = '1.6.1'
constraintlayout = '2.1.4'
navigation = '2.5.3'
navigation-ui = '2.5.3'
junit = '4.13.2'
test-ext = '1.1.5'
espresso = '3.5.1'[libraries]
android-material = { module = "com.google.android.material:material", version.ref = "material" }
androidx-core = { module = "androidx.core:core-ktx", version.ref = "core" }
androidx-appcompat = { module = "androidx.appcompat:appcompat", version.ref = "appcompat" }
androidx-constraintlayout = { module = "androidx.constraintlayout:constraintlayout", version.ref = "constraintlayout" }
navigation = { module = "androidx.navigation:navigation-fragment-ktx", version.ref = "navigation" }
navigation-ui = { module = "androidx.navigation:navigation-ui-ktx", version.ref = "navigation-ui" }
test-junit = { module = "junit:junit", version.ref = "junit" }
test-ext = { module = "androidx.test.ext:junit", version.ref = "test-ext" }
test-espresso = { module = "androidx.test.espresso:espresso-core", version.ref = "espresso" }[bundles]
android-test = ["test-ext","test-espresso"]
androidx-navigation = ["navigation", "navigation-ui"][plugins]
appliaction = { id = "com.android.application", version.ref = "application" }
kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }该文件分了四个板块，[versions],[libraries],[bundles],[plugins]，bundles的作用是将libraries中你觉得可以绑定到一起的引用绑定到一块，在build.gradle中引用时，只引用bundle的值就行，相当于一次引用多个libraries。
该文件不需要进行关联，gradle会自动识别****.toml文件，所以只要按这个格式命名就行。
3. 对内容进行引用
@Suppress("DSL_SCOPE_VIOLATION")
plugins {alias(libs.plugins.appliaction)alias(libs.plugins.kotlin.android)
}android {namespace = "com.example.myapplication"compileSdk = Integer.parseInt(libs.versions.compileSdk.get())defaultConfig {applicationId = libs.versions.applicationId.get()minSdk = Integer.parseInt(libs.versions.minSdk.get())targetSdk = Integer.parseInt(libs.versions.targetSdk.get())versionCode = Integer.parseInt(libs.versions.versionCode.get())versionName = libs.versions.versionName.get()testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"}buildTypes {release {isMinifyEnabled = falseproguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"),"proguard-rules.pro")}}compileOptions {sourceCompatibility = JavaVersion.VERSION_1_8targetCompatibility = JavaVersion.VERSION_1_8}kotlinOptions {jvmTarget = "1.8"}buildFeatures {viewBinding = true}
}dependencies {implementation(libs.androidx.core)implementation(libs.androidx.appcompat)implementation(libs.android.material)implementation(libs.androidx.constraintlayout)implementation(libs.bundles.androidx.navigation)testImplementation(libs.test.junit)androidTestImplementation(libs.bundles.android.test)
}引用后的build.gradle文件，可以对照前面的Kotlin DSL，所有的版本号和依赖都引用了libs.versions.toml，以此进行统一管理。version catalog弥补了config.gradle的缺点，可支持跳，在文件中也可以看到引用的升级建议：
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