无法解析：com.android.support:design-v7:27.1.1

Question

我正在使用 Android Studio 3.1.3。Gradle 构建同步失败。我使用了以下方法，但没有使用它。如果有任何解决方案请告诉我

1. maven { url "https://maven.google.com" }

2. 使重启和缓存无效

3. multiDexEnabled true

4. 添加mavenLocal()和mavenCentral()

   这是模块级build.gradle文件：

   android {
           compileSdkVersion 27
           defaultConfig {
               applicationId "com.developers.a_g.designapp"
               minSdkVersion 15
               targetSdkVersion 27
               buildToolsVersion '27.1.1'
               versionCode 1
               versionName "1.0"
               multiDexEnabled true
               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-v7:27.1.1'
       implementation 'com.android.support.constraint:constraint-layout:1.1.2'
       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'
       implementation 'com.android.support:cardview-v7:27.1.1'
       implementation 'com.android.support:design-v7:27.1.1'
       implementation 'com.rengwuxian.materialedittext:library:2.1.4'
       implementation 'com.szagurskii:patternedtextwatcher:0.5.0'
       implementation 'com.github.d-max:spots-dialog:0.7@aar'
       implementation 'com.squareup.retrofit2:retrofit:2.3.0'
       implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
   }
   
   
    android {
           compileSdkVersion 27
           defaultConfig {
               applicationId "com.developers.a_g.designapp"
               minSdkVersion 15
               targetSdkVersion 27
               buildToolsVersion '27.1.1'
               versionCode 1
               versionName "1.0"
               multiDexEnabled true
               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-v7:27.1.1'
       implementation 'com.android.support.constraint:constraint-layout:1.1.2'
       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'
       implementation 'com.android.support:cardview-v7:27.1.1'
       implementation 'com.android.support:design-v7:27.1.1'
       implementation 'com.rengwuxian.materialedittext:library:2.1.4'
       implementation 'com.szagurskii:patternedtextwatcher:0.5.0'
       implementation 'com.github.d-max:spots-dialog:0.7@aar'
       implementation 'com.squareup.retrofit2:retrofit:2.3.0'
       implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
   }
   

---

这是项目级别的build.gradle文件：

    buildscript {

        repositories {

            jcenter()
            google()


            maven {
                url "https://maven.google.com"
            }
        }
        dependencies {
            classpath 'com.android.tools.build:gradle:3.1.3'
        }
    }

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

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

Answer 1

首先确保您使用：

targetSdkVersion 27
compileSdkVersion 27
buildToolsVersion '27.0.3'

你的 gradle 是这样的：

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

buildscript {

    repositories {
        google()
        //..
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'

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

allprojects {
    repositories {
        google()
        //..
    }
}

并更新设计实现，如下所示：

implementation 'com.android.support:design:27.1.1'

您收到此错误是因为 com.android.support:design-v7 不存在它在没有 -v7 的情况下存在，您也可以随时在此链接中检查支持库以确保您使用的是正确的库。