这些是我得到的错误代码：

Information:Gradle tasks [assemble]
Error:(9,5) error: resource android:attr/dialogCornerRadius not found.
/home/liam/.gradle/caches/transforms-1/files-1.1/appcompat-v7-28.0.0-alpha1.aar/536e4dd78846259cf8bef0fd6a3ea0e6/res/values/values.xml

我认为这是由Android P发布和我的Android Studio自动升级或类似的东西引起的.这可以解释为什么有效的旧提交会得到同样的错误.
这将是一个非常新的问题,这可以解释为什么我还没有找到解决方案.

搜索这些错误代码会导致类似的问题,可以通过更改gradle构建文件中的SDK版本来解决.我的问题与此不同,因为更改为SDK 28(我很确定28甚至不存在)导致android工作室说这个包不可用/不存在下载.

How to find issue Android SDK 3.0 Error:(9,5) error: resource android:attr/colorError not found

单击前面提到的错误代码会打开一个名为v28 / values-v28.xml的文件.

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="Base.Theme.AppCompat" parent="Base.V28.Theme.AppCompat"/>
    <style name="Base.Theme.AppCompat.Light" parent="Base.V28.Theme.AppCompat.Light"/>
    <style name="Base.V28.Theme.AppCompat" parent="Base.V26.Theme.AppCompat">
        <!-- We can use the platform styles on API 28+ -->
        <item name="dialogCornerRadius">?android:attr/dialogCornerRadius</item>
    </style>
    <style name="Base.V28.Theme.AppCompat.Light" parent="Base.V26.Theme.AppCompat.Light">
        <!-- We can use the platform styles on API 28+ -->
        <item name="dialogCornerRadius">?android:attr/dialogCornerRadius</item>
    </style>
</resources>

这是我的gradle文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.timelord.timelord.timelord"
        minSdkVersion 24
        targetSdkVersion 26
        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 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support:design:+'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    implementation files('libs/joda-time-2.9.9.jar')
}

和

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}