源码： 

/** * Created by bony on 2017-07-29. * Email: bony */public class Demo {    public static void main(String arg[]){        System.out.println("Hello World!");    }}

 编译与运行：

\Android_SDK\build-tools\25.0.2\dx.bat --dex --output=Demo.dex Demo.class

adb push Demo.dex data/local/tmp/

adb shell dalvikvm -cp /data/local/tmp/Demo.dex Demo