android - 为什么 Android Studio 3.2.1 中的新项目模板不使用 AndroidX 库？

Question

谷歌说

"We recommend using the AndroidX libraries in all new projects. You should also consider migrating existing projects to AndroidX as well." source

但 Android Studio 3.2.1 仍会创建一个新的项目模板，该模板由历史“android.support.*”库支持。

为什么？

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.developer.myapplication"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:support-vector-drawable:28.0.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

Answer 1

直到 Android Studio 3.3或更高版本(目前仍是预览版/测试版)。

如果你用它创建一个新项目，你会发现这个Use AndroidX artifacts选项。然后创建之后，你会发现依赖项默认是androidx.*