"Could not create the Java Virtual Machine" when used Ant package

The error message:

-dex:

[dex] input: I:\companywork\GamePlay\samples\game-sanguo\android\bin\class

es

[dex] input: J:\android\android-sdk-windows\tools\support\annotations.jar

[dex] Pre-Dexing J:\android\android-sdk-windows\tools\support\annotations.

jar -> annotations-31e2db6e0f9d274026a19c8df80cad9a.jar

[dx] Error occurred during initialization of VM

[dx] Could not reserve enough space for object heap

[dx] Error: Could not create the Java Virtual Machine.

[dx] Error: A fatal exception has occurred. Program will exit.

到你的androidSDK目录下 android-sdk-windows\build-tools 找到对应版本的编译工具 我用的是21.1.2

进入目录找到 dx.bat -》 set defaultXmx=-Xmx512M 改小点比如512M