Android studio遇到 java.lang.OutOfMemoryError: GC app:transformClassesWithDexForDebug解决方法 以及gradle优化

Android studio遇到 java.lang.OutOfMemoryError: GC app:transformClassesWithDexForDebug解决方法 以及gradle优化设置

Android studio引入或者新建工程编译发现报以下错误，详细日志如下：

Error:Uncaught translation error: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: GC overhead limit exceededError:Uncaught translation error: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: GC overhead limit exceededError:2 errors; aborting:app:transformClassesWithDexForDebug FAILEDError:Execution failed for task ':app:transformClassesWithDexForDebug'.> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Program Files\Java\jdk1.8.0_74\bin\java.exe'' finished with non-zero exit value 1Information:BUILD FAILEDInformation:Total time: 6 mins 23.159 secsInformation:See complete output in consoleInformation:1,876 errorsInformation:0 warnings

大家看到ＯＯＭ一开始就是想到内存问题，
app:transformClassesWithDexForDebug问题大家应该比较熟悉了，
例如常见的是包冲突或者jar冲突导致的，去检查下build.gradle，工具会提醒报错，大家修改后重新编译即可．

这里的提示的是java.lang.OutOfMemoryError: GC overhead，应该就是Android studio分配的内存不够引起的.
还有一个问题发现编译时间长达6分多钟.
所以做了以下优化测试可以解决:
1.打开AS安装目录所在的位置,bin目录下,如图:

2.用记事本软件打开1中文件.
修改为以下内容,增加分配默认内存(具体内存可以适当加大):

## *DO NOT* modify this file directly. If there is a value that you would like to override,# please add it to your user specific configuration file.## See http://tools.android.com/tech-docs/configuration#-Xms2048m-Xmx2048m-XX:MaxPermSize=2048m-XX:ReservedCodeCacheSize=1024m-XX:+UseConcMarkSweepGC-XX:SoftRefLRUPolicyMSPerMB=50-da-Djna.nosys=true-Djna.boot.library.path=-Djna.debug_load=true-Djna.debug_load.jna=true-Dsun.io.useCanonCaches=false-Djava.net.preferIPv4Stack=true-XX:+HeapDumpOnOutOfMemoryError-Didea.paths.selector=AndroidStudio2.0-Didea.platform.prefix=AndroidStudio

3.打开对应的项目中的“gradle.properties”文件,

修改值为以下内容,增大内存分配(具体内存可以适当加大):

# Project-wide Gradle settings.# IDE (e.g. Android Studio) users:# Settings specified in this file will override any Gradle settings# configured through the IDE.# For more details on how to configure your build environment visit# http://www.gradle.org/docs/current/userguide/build_environment.html# The Gradle daemon aims to improve the startup and execution time of Gradle.# When set to true the Gradle daemon is to run the build.# TODO: disable daemon on CI, since builds should be clean and reliable on serversorg.gradle.daemon=true# Specifies the JVM arguments used for the daemon process.# The setting is particularly useful for tweaking memory settings.# Default value: -Xmx10248m -XX:MaxPermSize=256morg.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8# When configured, Gradle will run in incubating parallel mode.# This option should only be used with decoupled projects. More details, visit# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projectsorg.gradle.parallel=true# Enables new incubating mode that makes Gradle selective when configuring projects.# Only relevant projects are configured which results in faster builds for large multi-projects.# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:configuration_on_demandorg.gradle.configureondemand=true

然后gradle优化设置:
1.修改gradle-wrapper.properties文件：

例如内容:

具体版本与实际保持一致
2.关闭编译是读取网络资源,节省编译时间
file->setting菜单进入如下设置:

然后进入以下菜单设置:

现在设置完成了,我再次编译下看下结果:
发现编译成功了,而且时间也短了不少(PS:公司电脑有点反应慢,哈哈,所以现在编译还是比较慢的,单相对于之前快了很多)

以上配置解决了遇到的java.lang.OutOfMemoryError: GC app:transformClassesWithDexForDebug编译错误,后面相关设置也优化了编译时间问题,希望对大家有所帮助.
大家发现有更好的解决与优化版本可以一起分享与沟通一下.