Android Studio Error -- Could not create the Java Virtual Machine

:app:dexDebug Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. FAILED FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:dexDebug'. > com.android.ide.common.internal.LoggedErrorException: Failed to run command: E:\Program Files\adt-bundle-windows-x86-20140702\sdk\build-tools\21.1.2\dx.bat --dex --no-optimize --output E:\android\workspace\DialogDemo\app\build\intermediates\dex\debug --input-list=E:\android\workspace\DialogDemo\app\build\intermediates\tmp\dex\debug\inputList.txt Error Code: 1 Output: Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. BUILD FAILED

Gradle打包的时候经常出现此错误，命令--stacktrace

Error occurred during initialization of VM Could not reserve enough space for object heap Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.

目前google and 百度查询有两种解决方案

1.设置java的

-Xms128m
-Xmx512m
-XX:MaxPermSize=250m

修改这三个参数

2.升级JDK

经过测试2种方案都不行

 

通过

dx.bat --dex

命令的dx.bat脚本有这样一句代码

REM By default, give dx a max heap size of 1 gig and a stack size of 1meg. rem This can be overridden by using "-JXmx..." and "-JXss..." options below.

set defaultXmx=-Xmx1024M set defaultXss=-Xss1m

set defaultXmx=-Xmx1024M

原因就是此处设置的Xmx为1024M，编译打包APK时java虚拟机内存空间不足，修改为512M即可正常编译打包了。

set defaultXmx=-Xmx512M