bug描述

Caused by: org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':app:debugCompileClasspath'.

产生原因

1. 一般可能是更换了新AndroidStudio导致的。
2. 依赖库未能成功下载

解决办法

1.新版本AndroidStudio解决办法

该方法不行就使用下面的旧版本方法试试

注意：修改的是，项目的根目录下的settings.gradle文件内容

pluginManagement {repositories {gradlePluginPortal()google()mavenCentral()maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }maven { url "https://jitpack.io" }}
}
dependencyResolutionManagement {repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)repositories {google()mavenCentral()maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }maven { url "https://jitpack.io" }}
}
rootProject.name = "My Application"
include ':app'

2.旧版本AndroidStudio用下面的办法

注意：修改的是，项目的根目录下的build.gradle文件内容

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {repositories {maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }jcenter()maven { url "https://jitpack.io" }}
}allprojects {repositories {maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }jcenter()maven { url "https://jitpack.io" }}
}

出现该问题的背景介绍

由于有多个项目同时开发，其中一个项目工程出现了问题，开发布局时不智能提示相关属性如id等，最后通过更换AndroidStudio解决掉的，然后回头来开发其他项目时发现工程跑不起来了，各种报错，其中一个错误就是：

Caused by: org.gradle.api.internal.artifacts.ivyservice.
DefaultLenientConfiguration$ArtifactResolveException: Could 
not resolve all files for configuration ':app:debugCompileClasspath'.

顿时我蒙蔽了，前几天还好好的呢。根据解释应该是gradle出现了问题，于是各种调试，都没解决。最后的解决办法就是上面说的更换回之前的AndroidStudio就好了。但我刚发现之前的不提示属性问题又出现了。

关于androidstudio 布局文件不提示属性问题如图：

打id时不提示id属性，解决办法如图：

修改 app的build.gradle中的compileSdk版本，改完后同步，再试试。