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本版专家分：0结帖率 100% -
我建立了一个默认项目，就是不能启动报一下错误
Could not find com.android.tools.build:gradle:3.1.4.
Searched in the following locations:
https://jcenter.bintray.com/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.pom
https://jcenter.bintray.com/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.jar
http://maven.springframework.org/release/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.pom
http://maven.springframework.org/release/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.jar
http://maven.restlet.org/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.pom
http://maven.restlet.org/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.jar
https://repo.maven.apache.org/maven2/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.pom
https://repo.maven.apache.org/maven2/com/android/tools/build/gradle/3.1.4/gradle-3.1.4.jar
Required by:
project :
Add Google Maven repository and sync project
Open File
Enable embedded Maven repository and sync project
什么代码都没有，就是默认项目，一直不能启动，按照网上教程设置了gradle路径，设置了代理，就是不能启动
build:gradle文件
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
//google()
jcenter()
maven { url "http://maven.springframework.org/release" }
maven { url "http://maven.restlet.org" }
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.4'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
//google()
jcenter()
maven { url "http://maven.springframework.org/release" }
maven { url "http://maven.restlet.org" }
mavenCentral()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
gradle-wrapper.properties 文件
#Tue Oct 09 05:56:05 CST 2018
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
Android Studio 3.14正式版官方安装版
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本版专家分：62
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把那两个google()的注释去掉，然后执行Sync Project with Gradle Files 试下，不行再试下执行Make Project。
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本版专家分：0
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取消变成另外一个错了，我在安装网上的加上注释的
我的setting设置：C:/Users/Administrator/.gradle/wrapper/dists/gradle-4.4-all/9br9xq1tocpiv8o6njlyu5op1/gradle-4.4
可以保证这个是自行下载的，我按照网上解决方案添加的
取消“google()”注释就变成一下错误了，整了一天了，新建默认项目都启动不起
Connection timed out: connect
而这个错误的解决方法，我已经参考网上资料进行设置了，就是解决不了问题！我第一次下载的是“Android Studio 3.2正式版”,因为这个问题重新下载的3.1.4版本，SDK是最新的。gradle是自行下载的。
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本版专家分：0
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Download https://dl.google.com/dl/android/maven2/com/android/support/appcompat-v7/maven-metadata.xml Running for 9s
下载这个老失败！
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本版专家分：85
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maven中增加下面这句，放在前面。
maven{ url 'http://maven.aliyun.com/nexus/content/groups/public/'}
gradle-4.4，实在不行，就手工下载，再放到需要的位置。
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本版专家分：0
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4.4下载成功了！但是就是运行不起来！这个也试了！郁闷的很！
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本版专家分：85
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还报什么样的错误？
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本版专家分：0
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最新的报错！
Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.+.
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Show Details
Unable to resolve dependency for ':app@debug/compileClasspath': Could not resolve com.android.support:design:28.+.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support.test:runner:1.0.1.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support.test.espresso:espresso-core:3.0.1.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.+.
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Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not resolve com.android.support:design:28.+.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.+.
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Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not resolve com.android.support:design:28.+.
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Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.+.
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Show Details
Unable to resolve dependency for ':app@release/compileClasspath': Could not resolve com.android.support:design:28.+.
Open File
Show Details
Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.android.support:appcompat-v7:28.+.
Open File
Show Details
Unable to resolve dependency for ':app@releaseUnitTest/compileClasspath': Could not resolve com.android.support:design:28.+.
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本版专家分：10
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Android studio 在哪下载
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本版专家分：1545 -
为什么不用3.21版？我前几天下载了这个版本，一路安装，新建工程就可以编译运行了
