无法解决android studio中的所有依赖项 [英] Unable to resolve all dependencies in android studio

问题描述

我收到这些错误:-

错误:无法解析:app@debug/compileClasspath"的依赖关系:无法解析 com.android.support:appcompat-v7:27.0.0.

错误:无法解析:app@debugAndroidTest/compileClasspath"的依赖关系:无法解析 com.android.support.test:runner:1.0.1.

错误:无法解析:app@releaseUnitTest/compileClasspath"的依赖关系:无法解析 junit:junit:4.12.

错误:无法解析:app@debugAndroidTest/compileClasspath"的依赖关系:无法解析 com.android.support.test.espresso:espresso-core:3.0.1.

1. 我尝试了很多方法，但它无法同步 gradle.
2. 我也尝试过 GRADLE 离线方法，但也没有奏效.
3. 我曾尝试添加 GOOGLE MAVEN REPO 存储库，但没有奏效.
4. 我已经尝试了此处列出的所有这些方法:- .>

   I am getting these errors:-

   Error:Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:appcompat-v7:27.0.0.

   Error:Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support.test:runner:1.0.1.

   Error:Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve junit:junit:4.12.

   Error:Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support.test.espresso:espresso-core:3.0.1.

   1. I have tried many methods but, it is not syncing gradle.
   2. I have tried GRADLE OFFLINE METHOD TOO, BUT THAT ALSO DIDN'T WORK.
   3. I have tried adding GOOGLE MAVEN REPO REPOSITORY BUT THAT DIDN'T WORK.
   4. I have tried all these methods listed here :- Failed to resolve: com.android.support:cardview-v7:26.0.0 android

   screenshots where the sync is stuck

   I am new to android studio plz omit mistakes.

   Application build.gradle file :

       apply plugin: 'com.android.application'
   
   android {
       compileSdkVersion 27
       buildToolsVersion "26.0.2"
       defaultConfig {
           applicationId "com.example.firstapp.myapplication"
           minSdkVersion 16
           targetSdkVersion 27
           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-v7:27.0.0'
       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'
   }
   

   Application build.gradle file

       // 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:3.0.0'
   
   
               // NOTE: Do not place your application dependencies here; they belong
               // in the individual module build.gradle files
           }
       }
   
       allprojects {
       repositories {
           jcenter()
           maven {
               url "https://maven.google.com"
           }
       }
   }
   
       task clean(type: Delete) {
           delete rootProject.buildDir
       }
   

   解决方案

   I think that you are missing the Google maven repo.

   repositories {
       jcenter()
       maven {
           url "https://maven.google.com"
       }
   }
   

   You have the full document here.

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