使用gradle构建项目build sync fail，只是输出：Starting Gradle Daemon...就没了，这是由于本机安装了多个jdk版本导致gradle的javaHome变量不一致。

由于idea窗口并没有输出详细日志，只是输出了：Starting Gradle Daemon...就没了，我们可以如下图操作：

打开可以找到idea.log。打开改文件可查看详细的信息。

具体的idea log报错信息如下：

2020-06-11 19:00:21,250 [  33121]   INFO - a.AndroidGradleProjectResolver - Exception thrown during task execution 
org.gradle.tooling.GradleConnectionException: Could not run phased build action using Gradle installation 'D:\gradle\gradle-6.5'.
    at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:55)
    at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:29)
    at org.gradle.tooling.internal.consumer.ResultHandlerAdapter.onFailure(ResultHandlerAdapter.java:43)
    at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor.lambda$run$0(DefaultAsyncConsumerActionExecutor.java:57)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.gradle.launcher.daemon.client.DaemonConnectionException: The newly created daemon process has a different context than expected.
It won't be possible to reconnect to this daemon. Context mismatch: 
Java home is different.
Wanted: DefaultDaemonContext[uid=null,javaHome=D:\Java\jdk1.8.0_181,daemonRegistryDir=D:\gradle\.gradle\daemon,pid=8024,idleTimeout=null,priority=NORMAL,daemonOpts=-XX:MaxMetaspaceSize=256m,-XX:+HeapDumpOnOutOfMemoryError,-Xms256m,-Xmx512m,-Dfile.encoding=GBK,-Duser.country=CN,-Duser.language=zh,-Duser.variant]
Actual: DefaultDaemonContext[uid=3d814610-49c2-473e-bda4-b99a73689f2f,javaHome=D:\Java\jdk1.8.0_181\jre,daemonRegistryDir=D:\gradle\.gradle\daemon,pid=3012,idleTimeout=10800000,priority=NORMAL,daemonOpts=-XX:MaxMetaspaceSize=256m,-XX:+HeapDumpOnOutOfMemoryError,-Xms256m,-Xmx512m,-Dfile.encoding=GBK,-Duser.country=CN,-Duser.language=zh,-Duser.variant]

    at org.gradle.launcher.daemon.client.DefaultDaemonConnector.connectToDaemonWithId(DefaultDaemonConnector.java:253)
    at org.gradle.launcher.daemon.client.DefaultDaemonConnector.doStartDaemon(DefaultDaemonConnector.java:222)
    at org.gradle.launcher.daemon.client.DefaultDaemonConnector.startDaemon(DefaultDaemonConnector.java:211)
    at org.gradle.launcher.daemon.client.DefaultDaemonConnector.connect(DefaultDaemonConnector.java:133)
    at org.gradle.launcher.daemon.client.DaemonClient.execute(DaemonClient.java:145)
    at org.gradle.launcher.daemon.client.DaemonClient.execute(DaemonClient.java:99)
    at org.gradle.tooling.internal.provider.DaemonBuildActionExecuter.execute(DaemonBuildActionExecuter.java:51)
    at org.gradle.tooling.internal.provider.DaemonBuildActionExecuter.execute(DaemonBuildActionExecuter.java:35)
    at org.gradle.tooling.internal.provider.LoggingBridgingBuildActionExecuter.execute(LoggingBridgingBuildActionExecuter.java:60)
    at org.gradle.tooling.internal.provider.LoggingBridgingBuildActionExecuter.execute(LoggingBridgingBuildActionExecuter.java:38)
    at org.gradle.tooling.internal.provider.ProviderConnection.run(ProviderConnection.java:211)
    at org.gradle.tooling.internal.provider.ProviderConnection.runPhasedAction(ProviderConnection.java:172)
    at org.gradle.tooling.internal.provider.DefaultConnection.run(DefaultConnection.java:245)
    at org.gradle.tooling.internal.consumer.connection.PhasedActionAwareConsumerConnection.run(PhasedActionAwareConsumerConnection.java:56)
    at org.gradle.tooling.internal.consumer.connection.ParameterValidatingConsumerConnection.run(ParameterValidatingConsumerConnection.java:62)
    at org.gradle.tooling.internal.consumer.DefaultPhasedBuildActionExecuter$1.run(DefaultPhasedBuildActionExecuter.java:78)
    at org.gradle.tooling.internal.consumer.DefaultPhasedBuildActionExecuter$1.run(DefaultPhasedBuildActionExecuter.java:70)
    at org.gradle.tooling.internal.consumer.connection.LazyConsumerActionExecutor.run(LazyConsumerActionExecutor.java:87)
    at org.gradle.tooling.internal.consumer.connection.CancellableConsumerActionExecutor.run(CancellableConsumerActionExecutor.java:45)
    at org.gradle.tooling.internal.consumer.connection.ProgressLoggingConsumerActionExecutor.run(ProgressLoggingConsumerActionExecutor.java:61)
    at org.gradle.tooling.internal.consumer.connection.RethrowingErrorsConsumerActionExecutor.run(RethrowingErrorsConsumerActionExecutor.java:38)
    at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor.lambda$run$0(DefaultAsyncConsumerActionExecutor.java:55)
    ... 6 more
2020-06-11 19:00:21,250 [  33121]   INFO - .project.GradleProjectResolver - Gradle project resolve error 
org.gradle.tooling.GradleConnectionException: Could not run phased build action using Gradle installation 'D:\gradle\gradle-6.5'.
    at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:55)
    at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:29)
    at org.gradle.tooling.internal.consumer.ResultHandlerAdapter.onFailure(ResultHandlerAdapter.java:43)
    at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor.lambda$run$0(DefaultAsyncConsumerActionExecutor.java:57)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.gradle.launcher.daemon.client.DaemonConnectionException: The newly created daemon process has a different context than expected.

1.检查java_home环境变量

2.要求的路径是 javaHome=D:\Java\jdk1.8.0_181  但是实际的路径是  D:\Java\jdk1.8.0_181\jre

是因为之前解决别的问题把jdk中的tool.jar放到了jre中,所以  D:\Java\jdk1.8.0_181\jre把这个目录下的

tool.jar删掉就好了.估计gradle是按照tool.jar的目录设置默认目录的.