我已将android studio更新为3.1.3，升级后，我的gradle无法同步，并且显示了此错误：
Caused by: org.gradle.api.resources.ResourceException: Could not get resource 'https://dl.google.com/dl/android/maven2/com/android/tools/build/builder/3.0.1/builder-3.0.1.jar'.
at org.gradle.internal.resource.ResourceExceptions.failure(ResourceExceptions.java:74)
at org.gradle.internal.resource.ResourceExceptions.getFailed(ResourceExceptions.java:57)
at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor.copyToCache(DefaultCacheAwareExternalResourceAccessor.java:198)
at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor.access$300(DefaultCacheAwareExternalResourceAccessor.java:55)
at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor$1.create(DefaultCacheAwareExternalResourceAccessor.java:88)
at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor$1.create(DefaultCacheAwareExternalResourceAccessor.java:80)
at org.gradle.cache.internal.ProducerGuard$AdaptiveProducerGuard.guardByKey(ProducerGuard.java:97)
at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor.getResource(DefaultCacheAwareExternalResourceAccessor.java:80)
at org.gradle.api.internal.artifacts.repositories.resolver.DefaultExternalResourceArtifactResolver.downloadStaticResource(DefaultExternalResourceArtifactResolver.java:97)
at org.gradle.api.internal.artifacts.repositories.resolver.DefaultExternalResourceArtifactResolver.resolveArtifact(DefaultExternalResourceArtifactResolver.java:67)
at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver.download(ExternalResourceResolver.java:310)
at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver.resolveArtifact(ExternalResourceResolver.java:296)
... 27 more
Caused by: org.gradle.internal.resource.transport.http.HttpRequestException: Could not GET 'https://dl.google.com/dl/android/maven2/com/android/tools/build/builder/3.0.1/builder-3.0.1.jar'.
at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:97)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performRawGet(HttpClientHelper.java:81)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performGet(HttpClientHelper.java:85)
at org.gradle.internal.resource.transport.http.HttpResourceAccessor.openResource(HttpResourceAccessor.java:43)
at org.gradle.internal.resource.transport.http.HttpResourceAccessor.openResource(HttpResourceAccessor.java:29)
at org.gradle.internal.resource.transfer.DefaultExternalResourceConnector.openResource(DefaultExternalResourceConnector.java:56)
at org.gradle.internal.resource.transfer.ProgressLoggingExternalResourceAccessor.openResource(ProgressLoggingExternalResourceAccessor.java:36)
at org.gradle.internal.resource.transfer.AccessorBackedExternalResource.withContentIfPresent(AccessorBackedExternalResource.java:130)
at org.gradle.internal.resource.BuildOperationFiringExternalResourceDecorator$11.call(BuildOperationFiringExternalResourceDecorator.java:237)
at org.gradle.internal.resource.BuildOperationFiringExternalResourceDecorator$11.call(BuildOperationFiringExternalResourceDecorator.java:229)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:350)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:340)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:197)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:117)
at org.gradle.internal.resource.BuildOperationFiringExternalResourceDecorator.withContentIfPresent(BuildOperationFiringExternalResourceDecorator.java:229)
at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor.copyToCache(DefaultCacheAwareExternalResourceAccessor.java:196)
... 36 more
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to 127.0.0.1:9666 [/127.0.0.1] failed: Connection refused: connect
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:151)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:388)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performHttpRequest(HttpClientHelper.java:149)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performHttpRequest(HttpClientHelper.java:127)
at org.gradle.internal.resource.transport.http.HttpClientHelper.executeGetOrHead(HttpClientHelper.java:104)
at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:95)
... 51 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:74)
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:134)
... 63 more
它没有下载
https://dl.google.com/dl/android/maven2/com/android/tools/build/builder/3.0.1/builder-3.0.1.jar
，因此无法同步。
我如何手动下载此gradle并将其添加到我的android studio？
修改： 这是我的主要gradle 文件。我也尝试使用代理，但不起作用
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()
}
}
编辑：：我的升级版：
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "ir.persiandesigners.sima.sima"
minSdkVersion 14
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
vectorDrawables.useSupportLibrary = true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:26.0.0-alpha1'
compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'
compile 'com.android.support:cardview-v7:26.0.0-alpha1'
compile 'com.android.support:design:26.0.0-alpha1'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:0.5'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:2.2.2'
compile 'com.google.android.gms:play-services-gcm:11.8.0'
compile 'me.cheshmak:analytics:2.0.+'
implementation 'com.squareup.retrofit2:retrofit:2.4.0'
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
}
repositories {
maven {
url 'https://repository.cheshmak.me'
}
}
答案 0 :(得分：0)
您必须将根级别build.gradle更新为：
buildscript {
repositories {
jcenter()
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.1.4'
}
}
此外，请确保gradle不在离线模式下或没有防火墙（以防仍然无法下载）。
重点是，旧版本3.0.1在新的google()存储库中可能不可用。
答案 1 :(得分：0)
更改为应用程序级别的build.gradle文件
allprojects {
repositories {
jcenter()
maven {
url 'https://maven.google.com'
}
}
}
并将其添加到您的顶级build.gradle文件
allprojects {
repositories {
google()
jcenter()
mavenLocal()
mavenCentral()
}
}
答案 2 :(得分：0)
1）将编译更改为实现
2）更新
repositories {
jcenter()
mavenLocal()
mavenCentral()
google()
}
到
repositories {
google()
jcenter()
mavenLocal()
mavenCentral()
}
3）使用+处理Google和Firebase依赖项有一个技巧，一旦成功使用最新版本进行构建即可。
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:+'
implementation 'com.android.support:recyclerview-v7:+'
implementation 'com.android.support:cardview-v7:+'
implementation 'com.android.support:design:+'
implementation 'com.google.android.gms:play-services-gcm:+'
implementation 'me.cheshmak:analytics:2.0.+'
implementation 'com.squareup.retrofit2:retrofit:2.4.0'
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
}
答案 3 :(得分：0)
根据android文档中有关本地环境构建依赖项的说明，可以使用以下配置：
implementation fileTree(dir: 'libs', include: ['*.jar'])
Gradle在项目的module_name / libs /目录中声明对JAR文件的依赖（因为Gradle读取相对于build.gradle文件的路径）。
或者，您可以如下指定单个文件：
implementation files('libs/foo.jar', 'libs/bar.jar')
在您的情况下，下载必要的jar并将其放入lib中。当然，这是一种解决方法