Material Android 不支持设计和 Appcompat-v7？

Question

我是 Android 编程新手。当我尝试将 material 设计库添加到 build.gradle 显示执行错误 'com.android.support:appcompat-v7:28.0.0'。
错误信息是：

Dependencies using groupId com.android.support and androidx.* can not be combined but found IdeMavenCoordinates{myGroupId='com.android.support', myArtifactId='support-fragment', myVersion='28.0.0', myPacking='aar', myClassifier='null'} and IdeMavenCoordinates{myGroupId='androidx.arch.core', myArtifactId='core-runtime', myVersion='2.0.0', myPacking='aar', myClassifier='null'} incompatible dependencies less... (Ctrl+F1)
Inspection info:There are some combinations of libraries, or tools and libraries, that are incompatible, or can lead to bugs. One such incompatibility is compiling with a version of the Android support libraries that is not the latest version (or in particular, a version lower than your targetSdkVersion). Issue id: GradleCompatible

我不想删除 appcompat，因为我想支持较低版本。

这是我的 gradle 代码：

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    buildToolsVersion "29.0.0"
    defaultConfig {
        applicationId "com.vignesh.materialdesigntest"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "com.google.android.material:material:1.1.0-alpha07"
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    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

您需要迁移到 AndroidX

转到 android 工作室菜单

Refactor

在此菜单下转到

Migrate to AndroidX

更多信息AndroidX

希望对您有所帮助！

Answer 2

在 Android Studio 中，导航到 Refactor 菜单和 select 迁移到 AndroidX

Material Android 不支持设计和 Appcompat-v7？

Material design and Appcompat-v7 not supported in Android?

android

android-studio

material-design

android-appcompat