1 问题

(1) android sutdio第一次打开一个工程巨慢怎么办？
(2) 手动配置Gradle Home为什么总是无效?
(3) 明明已经下载了Gradle，配置了gradle home,为什么2 简介打开工程还是去自动下载Gradle?

2 简介

需要解决上面问题，需要了解一下知识。

(1) Android Studio怎么知道该用哪个Gradle呢?
AS一个项目所用的Gradle是由我们的工程中下面这个文件决定的:

{your project}/gradle/wrapper/gradle-wrapper.properties

文件内容如下：

#Mon Sep 28 16:15:03 CST 2015
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.4-all.zip

最后一排的distributionUrl 决定了这个项目使用的gradle版本，也就是说不同的项目可以使用不同的gradle版本，这也就是为什么修改Gradle Home失败的原因。

原理：Android Studio打开一个工程时，首先会读取gradle-wrapper.properties 文件，从而知道这个工程需要哪个版本的gradle ,然后就会去保存gradle的文件夹GRADLE_USER_HOME 去找看存不存在这个版本的gradle，不存在则会去distributionUrl 去下载搞清楚了这个流程，现在是不是明白了，为什么第一次打开一个工程会巨慢了吧，因为AS会去下载gradle。

既然搞清楚了原理，也知道打开慢的原因是卡在下载gradle这一步，那么我们就自己下载gralde，然后配置上去。

(1) 修改gradle-wrapper.properties

修改gradle-wrapper.properties 中的 distributionUrl，改成我们想要的版本，只改后面的版本就可以了，前面的部分不要改。具体版本看下面链接：

Gradle下载地址：https://services.gradle.org/distributions/

(2) 打开项目

这个时候AS将自动下载gradle，并创建好目录。这时直接干掉Android Studio并退出，因为这一步是为了得到AS自动创建的下载目录，定位到下面的目录：

Linux:

~/.gradle/wrapper/dists

windows:

C:\users\{user name}\.gradle\wrapper\dists

如：

注意：Gradle是大家共用的，所以当然不会把Gradle放在项目文件中(不是不可以)

接着进入对应的gradle版本文件夹下，会发现有一个一串乱码的文件夹

(3) 下载gradle

从上面{your project}/gradle/wrapper/gradle-wrapper.properties
文件中的Gradle下载地址，下载对应版本的gradle，建议使用下载器进行下载，例如迅雷，本例中为gradle-2.4-all.zip,将下载的gradle-2.4-all.zip复制到上图中一串乱码的文件夹下，注意不要解压。这样我们就跳过了下载gradle这一步。

(4) 重新开启Android Studio,打开工程，ok，一下子就打开了.
另外，需要注意的是，gradle插件和gradle是两个独立的东西，gradle插件版本是由项目最外层的build.gradle文件决定的

app/build.gradle:

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'

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

转载自：https://blog.csdn.net/fuchaosz/article/details/51567808

BUT!!

我在导入第一行代码中的第三章的LIstView项目时，按照如上方法修改后，仍然报错。

org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project 'ListViewTest'.
   at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:79)
   at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:57)
   at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:540)
   at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:93)
   at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:42)
   at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:35)
   at org.gradle.initialization.DefaultGradleLauncher$2.run(DefaultGradleLauncher.java:124)
   at org.gradle.internal.Factories$1.create(Factories.java:22)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53)
   at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:121)
   at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32)
   at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:98)
   at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:92)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
   at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63)
   at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:92)
   at org.gradle.initialization.DefaultGradleLauncher.getBuildAnalysis(DefaultGradleLauncher.java:88)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.configure(InProcessBuildActionExecuter.java:107)
   at org.gradle.tooling.internal.provider.runner.ClientProvidedBuildActionRunner.run(ClientProvidedBuildActionRunner.java:45)
   at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
   at org.gradle.tooling.internal.provider.runner.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:58)
   at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:48)
   at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30)
   at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:81)
   at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:46)
   at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:52)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
   at org.gradle.util.Swapper.swap(Swapper.java:38)
   at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.health.DaemonHealthTracker.execute(DaemonHealthTracker.java:47)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:72)
   at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.health.HintGCAfterBuild.execute(HintGCAfterBuild.java:41)
   at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120)
   at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
   at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:237)
   at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
   at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at java.lang.Thread.run(Thread.java:745)
Caused by: org.gradle.api.artifacts.ResolveException: Could not resolve all dependencies for configuration ':classpath'.
   at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingConfigurationResolver.wrapException(ErrorHandlingConfigurationResolver.java:70)
   at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingConfigurationResolver.access$000(ErrorHandlingConfigurationResolver.java:33)
   at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingConfigurationResolver$ErrorHandlingResolvedConfiguration.getFiles(ErrorHandlingConfigurationResolver.java:199)
   at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:671)
   at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getFiles(DefaultConfiguration.java:293)
   at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getFiles(Unknown Source)
   at org.gradle.api.internal.initialization.DefaultScriptHandler.getScriptClassPath(DefaultScriptHandler.java:69)
   at org.gradle.plugin.use.internal.DefaultPluginRequestApplicator.defineScriptHandlerClassScope(DefaultPluginRequestApplicator.java:186)
   at org.gradle.plugin.use.internal.DefaultPluginRequestApplicator.applyPlugins(DefaultPluginRequestApplicator.java:75)
   at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:157)
   at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:38)
   at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:25)
   at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
   at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:55)
   ... 56 more
Caused by: org.gradle.internal.resolve.ArtifactResolveException: Could not download gradle-core.jar (com.android.tools.build:gradle-core:2.2.0)
   at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver.resolveArtifact(ExternalResourceResolver.java:240)
   at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver$RemoteRepositoryAccess.resolveArtifact(ExternalResourceResolver.java:436)
   at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CacheLockReleasingModuleComponentsRepository$LockReleasingRepositoryAccess$5.run(CacheLockReleasingModuleComponentsRepository.java:96)
   at org.gradle.internal.Factories$1.create(Factories.java:22)
   at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:242)
   at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:313)
   at org.gradle.cache.internal.DefaultPersistentDirectoryStore.longRunningOperation(DefaultPersistentDirectoryStore.java:114)
   at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.longRunningOperation(DefaultCacheFactory.java:179)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultCacheLockingManager.longRunningOperation(DefaultCacheLockingManager.java:56)
   at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CacheLockReleasingModuleComponentsRepository$LockReleasingRepositoryAccess.resolveArtifact(CacheLockReleasingModuleComponentsRepository.java:94)
   at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CachingModuleComponentRepository$ResolveAndCacheRepositoryAccess.resolveArtifact(CachingModuleComponentRepository.java:342)
   at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.BaseModuleComponentRepositoryAccess.resolveArtifact(BaseModuleComponentRepositoryAccess.java:54)
   at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.memcache.InMemoryCachedModuleComponentRepository$CachedAccess.resolveArtifact(InMemoryCachedModuleComponentRepository.java:82)
   at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.resolveArtifact(ErrorHandlingModuleComponentRepository.java:116)
   at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainArtifactResolver.resolveArtifact(RepositoryChainArtifactResolver.java:65)
   at org.gradle.api.internal.artifacts.ivyservice.resolveengine.ComponentResolversChain$ArtifactResolverChain.resolveArtifact(ComponentResolversChain.java:98)
   at org.gradle.api.internal.artifacts.ivyservice.ContextualArtifactResolver$3.execute(ContextualArtifactResolver.java:61)
   at org.gradle.api.internal.artifacts.ivyservice.ContextualArtifactResolver$3.execute(ContextualArtifactResolver.java:59)
   at org.gradle.internal.Transformers$4.transform(Transformers.java:169)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyContextManager.withIvy(DefaultIvyContextManager.java:61)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyContextManager.withIvy(DefaultIvyContextManager.java:39)
   at org.gradle.api.internal.artifacts.ivyservice.ContextualArtifactResolver$4.run(ContextualArtifactResolver.java:69)
   at org.gradle.internal.Factories$1.create(Factories.java:22)
   at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:192)
   at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:175)
   at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:106)
   at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.useCache(DefaultCacheFactory.java:187)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultCacheLockingManager.useCache(DefaultCacheLockingManager.java:64)
   at org.gradle.api.internal.artifacts.ivyservice.ContextualArtifactResolver.executeInContext(ContextualArtifactResolver.java:67)
   at org.gradle.api.internal.artifacts.ivyservice.ContextualArtifactResolver.resolveArtifact(ContextualArtifactResolver.java:59)
   at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingArtifactResolver.resolveArtifact(ErrorHandlingArtifactResolver.java:53)
   at org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.DefaultArtifactSet$LazyArtifactSource.create(DefaultArtifactSet.java:93)
   at org.gradle.api.internal.artifacts.ivyservice.resolveengine.artifact.DefaultArtifactSet$LazyArtifactSource.create(DefaultArtifactSet.java:80)
   at org.gradle.api.internal.artifacts.DefaultResolvedArtifact.getFile(DefaultResolvedArtifact.java:90)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$2.run(DefaultLenientConfiguration.java:122)
   at org.gradle.internal.Factories$1.create(Factories.java:22)
   at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:192)
   at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:175)
   at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:106)
   at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.useCache(DefaultCacheFactory.java:187)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultCacheLockingManager.useCache(DefaultCacheLockingManager.java:64)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration.getFiles(DefaultLenientConfiguration.java:119)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration.getFilesStrict(DefaultLenientConfiguration.java:91)
   at org.gradle.api.internal.artifacts.ivyservice.DefaultResolvedConfiguration.getFiles(DefaultResolvedConfiguration.java:45)
   at org.gradle.api.internal.artifacts.ivyservice.SelfResolvingDependencyConfigurationResolver$FilesAggregatingResolvedConfiguration.getFiles(SelfResolvingDependencyConfigurationResolver.java:87)
   at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingConfigurationResolver$ErrorHandlingResolvedConfiguration.getFiles(ErrorHandlingConfigurationResolver.java:197)
   ... 67 more
Caused by: org.gradle.api.resources.ResourceException: Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle-core/2.2.0/gradle-core-2.2.0.jar'.
   at org.gradle.internal.resource.ResourceExceptions.failure(ResourceExceptions.java:69)
   at org.gradle.internal.resource.ResourceExceptions.getFailed(ResourceExceptions.java:52)
   at org.gradle.api.internal.artifacts.repositories.resolver.DefaultExternalResourceArtifactResolver.downloadStaticResource(DefaultExternalResourceArtifactResolver.java:95)
   at org.gradle.api.internal.artifacts.repositories.resolver.DefaultExternalResourceArtifactResolver.resolveArtifact(DefaultExternalResourceArtifactResolver.java:56)
   at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver.download(ExternalResourceResolver.java:252)
   at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver.resolveArtifact(ExternalResourceResolver.java:238)
   ... 112 more
Caused by: org.gradle.internal.resource.transport.http.HttpRequestException: Could not GET 'https://jcenter.bintray.com/com/android/tools/build/gradle-core/2.2.0/gradle-core-2.2.0.jar'.
   at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:72)
   at org.gradle.internal.resource.transport.http.HttpClientHelper.performRawGet(HttpClientHelper.java:58)
   at org.gradle.internal.resource.transport.http.HttpClientHelper.performGet(HttpClientHelper.java:62)
   at org.gradle.internal.resource.transport.http.HttpResourceAccessor.openResource(HttpResourceAccessor.java:51)
   at org.gradle.internal.resource.transport.http.HttpResourceAccessor.openResource(HttpResourceAccessor.java:34)
   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.transport.DefaultExternalResourceRepository.getResource(DefaultExternalResourceRepository.java:63)
   at org.gradle.internal.resource.transfer.DefaultCacheAwareExternalResourceAccessor.getResource(DefaultCacheAwareExternalResourceAccessor.java:76)
   at org.gradle.api.internal.artifacts.repositories.resolver.DefaultExternalResourceArtifactResolver.downloadStaticResource(DefaultExternalResourceArtifactResolver.java:86)
   ... 115 more
Caused by: javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake
   at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1002)
   at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
   at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
   at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
   at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:394)
   at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:353)
   at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:134)
   at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)
   at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380)
   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:102)
   at org.gradle.internal.resource.transport.http.HttpClientHelper.executeGetOrHead(HttpClientHelper.java:79)
   at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:70)
   ... 124 more
Caused by: java.io.EOFException: SSL peer shut down incorrectly
   at sun.security.ssl.InputRecord.read(InputRecord.java:505)
   at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983)
   ... 141 more