在 Gradle 中加载材料 - 无法下载“android-P" [英] Load Material in Gradle - Failed downloading 'android-P'

问题描述

我对 Android Studio 真的很陌生.

i am really new to Android Studio.

我想将 Material 依赖项添加到我的项目中，但是在 sync 我的 gradle 文件中我收到一条错误消息.

I would like to add the Material dependency to my project but while sync my gradle file I get an error message.

此线程(link)告诉我使用 compileSdkVersion 'android-P' 但这会导致 android studio 告诉我下载 android-P 失败，当我点击下载时(... android-P 不是可供下载...).

This thread (link) told me to use compileSdkVersion 'android-P' but this results in android studio telling me to download android-Pwhich it fails to do, when i click on download (... android-P not avaliable for download..).

所以我按照材料主页上的描述重新尝试它开始.

So I went back to trying it as described on the material homepage get started.

您可以在下面找到我的相应代码和错误消息:

Below you can my find my according code and error message:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.chris.doghelper"
        minSdkVersion 22
        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'
        }
    }
}
allprojects {
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:support-v4:28.0.0'
    implementation 'com.android.support:design:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.google.android.material:material:1.0.0'
    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'
}

和错误信息:

Manifest merger failed : Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com.android.support:support-compat:28.0.0] AndroidManifest.xml:22:18-91
    is also present at [androidx.core:core:1.0.0] AndroidManifest.xml:22:18-86 value=(androidx.core.app.CoreComponentFactory).
    Suggestion: add 'tools:replace="android:appComponentFactory"' to <application> element at AndroidManifest.xml:5:5-24:19 to override.

你有解决我的问题的方法吗?

Do you have a fix for my problem?

推荐答案

这是因为您使用的是带有旧版支持库的新材料库.您必须将 android.support 迁移到 androidx 才能使用 com.google.android.material.

This is because you are using the new Material library with the legacy Support Library. You have to migrate android.support to androidx in order to use com.google.android.material.

如果您还不想切换到新的 androidx 和 com.google.android.material 包，您可以通过 com.android.support:design:28.0.0 依赖.

If you don't want to switch over to the new androidx and com.google.android.material packages yet, you can use Material Components via the com.android.support:design:28.0.0 dependency.

关注链接1和Link2.

要切换 androidX，请按照此 Link3.

To switch androidX follow this Link3.

我走得更深入，我为你找到了.

I went to more deeper and I got it for you.

它一定会帮助你.

快乐编码！

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